{"title":"BEST SOUNDING AUDIO TUBES IN STOCK TODAY (new items listed daily)","description":"\u003cp\u003eThe best sounding audio tubes money can buy (new items listed daily)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","products":[{"product_id":"ef86-valvo-germany-branded-siemens-nos-1965-p1","title":"(!!!!!) (Best Pair) EF86 Siemens Germany made by Valvo (Hamburg) NOS 1965 (3.4ma\/3.4ma) 1-2% matched","description":"\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e \u003cstrong\u003e1 Matched Pair) EF86 Siemens Germany made by Valvo NOS 1965 (Hamburg plant)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e1 tube) 3.4ma Gm=2100\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e1 tube) 3.4ma Gm=2200 \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eGood Ma range 2.5-3.5ma\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eGood Gm range 1800-2200\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch1\u003e \u003c\/h1\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003e- Vox AC10, AC30\u003cbr\u003e- Dr. Z Z-28\u003cbr\u003e- Vox AC15HTVH head (install all Mullard tubes: EF86, 12AX7, EZ81, EL84)\u003cbr\u003e- Eastern Electric M520\u003cbr\u003e- Matchless C-30, SC30\u003cbr\u003e- Bottlehead\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"EF86 Siemens Germany made by Valvo NOS 1965","offer_id":506082589,"sku":"ef86p1","price":138.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_8d321b95-618a-4798-a367-a0e8e7784473.jpg?v=1747775511"},{"product_id":"6l6gc-sylvania-tall-bottle-nos-p3","title":"(!!!!!) (Best Sylvania Pair) 6L6GC Sylvania TALL BOTTLE NOS 1970's (79ma and 80ma) 1-3% matched","description":"\u003cp\u003e1 matched pair) 6L6GC Sylvania TALL BOTTLE NOS 1970's same build\u003c\/p\u003e\n\u003cp\u003e1 tube) 79ma Gm=5900 Sylvania branded Philips\u003c\/p\u003e\n\u003cp\u003e1 tube) 80ma Gm=6200 Sylvania branded RCA\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eGood NOS range 60-72ma\u003c\/p\u003e\n\u003cp\u003eGood NOS Gm = 6000\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003erecommended for:\u003c\/p\u003e\n\u003cp\u003e- Mesa Boogie Mark IIC+ 1980 \u003cbr\u003e- Mesa 400\u003cbr\u003e- Two Rock K\u0026amp;M Ltd.\u003cbr\u003e- Fender\u003cbr\u003e- Ampeg B15 (B-15)\u003cbr\u003e- Fender Showman 1972\u003cbr\u003e- Leben\u003cbr\u003e- EICO HF20\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":510742253,"sku":"6L6GCsyl_pair","price":288.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_339dc60b-e7ea-4137-aa97-964f46cf3eb9.jpg?v=1755548449"},{"product_id":"6sn7gtb-cbs-short-bottle-nos-1961-p1","title":"(!!!!) (BEST PAIR) 6SN7GTB CBS SHORT BOTTLE NOS 1961 same date codes (8.4\/8.5ma and 8.2\/8.9ma) (similar to Sylvania) (Close Gm) (Schiit Freya, Rogue, Cary)","description":"\u003cp\u003e1 low noise pair) 6SN7GTB CBS SHORT BOTTLE NOS 1961 same date codes (similar to Sylvania) (strong Gm)\u003cbr\u003e1 tube) 8.4\/8.5ma Gm=2900\/2900\u003cbr\u003e1 tube) 8.2\/8.9ma Gm=2700\/2900\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSchiit Freya\u003c\/p\u003e\n\u003cp\u003eRogue\u003c\/p\u003e\n\u003cp\u003eModwright OPPO\u003c\/p\u003e\n\u003cp\u003eCary\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- similar build and sound to Sylvania with black plates\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6SN7GTB CBS NOS","offer_id":517272529,"sku":"6SN7GTBcbspr","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/4_fe10de44-8eed-4504-a89f-93ffabffb00f.jpg?v=1777235020"},{"product_id":"6sn7gtb-gep15","title":"(!!!!!) (BEST VALUE PAIR #1) 6SN7GTB GE coin-base NOS 1980 same date codes (7.4\/7.6ma and 7.8\/7.6ma) (same Gm) (Schiit Freya, Rogue)","description":"\u003cp\u003e1 low noise pair) 6SN7GTB GE NOS 1980 (JR) 1-3% matched \u003cbr\u003e1 tube) 7.4\/7.6ma Gm=2500\/2500\u003cbr\u003e1 tube) 7.8\/7.6ma Gm=2500\/2500 slightly taller\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e(Schiit Freya, Rogue)\u003c\/h1\u003e","brand":"Tube World","offers":[{"title":"6SN7GTB GE","offer_id":517277473,"sku":"6SN7GTBpr","price":68.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_58512993-90e8-475f-839e-5eda3bd69931.jpg?v=1756881170"},{"product_id":"ell80-6hu8-valvo-nos-branded-sylvania","title":"(!!!) (Best Pair) ELL80=6HU8 Valvo Germany NOS branded Sylvania and Dumont 1965-1966 (22\/21ma and 21\/22.5ma)","description":"\u003cp\u003e1 pair) ELL80=6HU8 Valvo Germany NOS same build\u003c\/p\u003e\n\u003cp\u003e1 tube) 21\/22ma Gm=6200\/6100 (Sylvania 1966)\u003c\/p\u003e\n\u003cp\u003e1 tube) 21\/22.5ma Gm=5900\/6300 (Dumont 1965)\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e- Fisher SA1000 amp\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e- German Radios\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":531857489,"sku":"ELL80","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_f35732ae-15c6-47e9-a4e3-e37c2dcd93fc.jpg?v=1741206505"},{"product_id":"best-pair-811a-ge-made-by-rca-nos-1950s-55-36-and-56-36","title":"(!!!!) (BEST PAIR) 811A GE made by RCA NOS 1950's (55\/36 and 56\/36)","description":"\u003cp\u003e1 matched pair) 811A GE NOS made by RCA 1950's\u003c\/p\u003e\n\u003cp\u003e1 tube) 55\/36 original box\u003c\/p\u003e\n\u003cp\u003e1 tube) 56\/36 white box\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on TV-7D\/U\u003cbr\u003e\u003cbr\u003e \u003c\/p\u003e\n\u003cp\u003e- WAVAC MD 811A\u003cbr\u003e- ALTEC LANSING 1570B\u003cbr\u003e- Ideal Innovations, Canada\u003cbr\u003e- Nat. Audio\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"811A","offer_id":546983961,"sku":"811Apr","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_4d86aff2-8ef0-441a-ab3e-e0e94dae32e2.jpg?v=1773069736"},{"product_id":"6cs7-rca-pair-2","title":"(!!!) (Best Pair) 6CS7 RCA gray plates NOS 1970 era (20\/10.6ma and 21\/12.2ma)","description":"\u003cp\u003e1 matched pair) 6CS7 RCA NOS tall gray ribbed plates 1970 era\u003c\/p\u003e\n\u003cp\u003e1 tube) 20ma\/10.6ma Gm=4300\/3000\u003c\/p\u003e\n\u003cp\u003e1 tube) 21ma\/12.2ma Gm=4700\/3100\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eGood Ma triode #1 = 20ma Good Gm = 4000-4500\u003c\/p\u003e\n\u003cp\u003eGood Ma triode #2 = 10ma, Good Gm = 2000-2200\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003efor:\u003c\/p\u003e\n\u003cp\u003eLeben CS 600 integrated amp\u003cbr\u003eLeben CS 660P power amp\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":561103077,"sku":"6CS7rca","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_271056ce-5174-41dd-b99a-ebacde166fb2.jpg?v=1775802697"},{"product_id":"6uf-1000vdc-cde-us-made-oil-cap-nos-1988","title":"(!!!) 6uf\/1000VDC CDE US made oil cap NOS 1988 (power supply or crossover cap) (27 in stock)","description":"\u003cp\u003e27 in stock\u003c\/p\u003e\n\u003cp\u003e6uf\/1000VDC CDE US made oil cap NOS in perfect condition 1988\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e(oval dimensions: 3\" long and 1.875\" wide) (no mounting brackets)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eCAPS CAN BE SHIPPED IN A PRIORITY MAIL FLAT-RATE\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eBOX TO ADDRESSES IN THE USA\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eEMAIL FOR A SHIPPING RATE IF YOU WANT TO ORDER\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eMORE THAN 2\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e(power supply)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":562787525,"sku":"6ufcde","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/6UFoil.jpg?v=1571438787"},{"product_id":"western-electric-309a-nos-1960-matched-pair","title":"(!!!!) (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)","description":"\u003cp\u003e1 matched pair) 309A Western Electric NOS 1960 original boxes - large punch plate\u003c\/p\u003e\n\u003cp\u003e1 tube) 4.8ma Gm=1100\u003c\/p\u003e\n\u003cp\u003e1 tube) 5.1ma Gm=1100\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eVplate=180V\u003c\/p\u003e\n\u003cp\u003eVscreen=75V\u003c\/p\u003e\n\u003cp\u003eVgrid=-1.5V\u003c\/p\u003e\n\u003cp\u003eGood Ma = 4.5-4.8ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 1000-1100\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGeneral Info\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- Variable-Mu Pentode\u003c\/p\u003e\n\u003cp\u003e- Very low noise\u003c\/p\u003e\n\u003cp\u003e- 5 pin base\u003c\/p\u003e\n\u003cp\u003eVfil=10V @ 320ma\u003c\/p\u003e\n\u003cp\u003eVplate=180V\u003c\/p\u003e\n\u003cp\u003eGm=1100\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World Express","offers":[{"title":"309A Western Electric NOS matched pair 1960","offer_id":609432749,"sku":"309Apr","price":288.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/309a1.jpg?v=1571438797"},{"product_id":"6v6gt-ge-coated-glass-nos-p1a","title":"(!!!!) (Best Pair) 6V6GT GE coated glass NOS 1952-1954 (46.8ma and 47.5ma)","description":"\u003cp\u003e1 pair) 6V6GT GE coated glass NOS 1952-1954\u003c\/p\u003e\n\u003cp\u003e1 tube) 46.8ma Gm=4300\u003c\/p\u003e\n\u003cp\u003e1 tube) 47.5ma Gm=4400\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- Fender Musicmaster Bass Guitar 1970\u003cbr\u003e- Fender Champion 600 (new)\u003cbr\u003e- Fender Tweed Champ 1960\u003cbr\u003e- Victoria Amp Model # 20122\u003cbr\u003e- Fender 57 Champ Reissue\u003cbr\u003e- Fender Deluxe 1963\u003cbr\u003e- Fender Tweed Champ with 5F1 circuit\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6V6GT GE coated glass","offer_id":657692661,"sku":"6V6GT","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/4_794d1e23-13b6-40c3-b86f-40b6c0d6ed86.jpg?v=1779828626"},{"product_id":"1608-rca-ceramic-base-nos-1940-era","title":"1608 RCA white ceramic base NOS in white box 1940 era (32.5ma)","description":"\u003cp\u003e1 tube) 1608 RCA white ceramic base NOS in white box 1940 era\u003c\/p\u003e\n\u003cp\u003eVplate=350V, Vgrid=-10V Iplate=32.5ma Gm=5400 (NOS = 36ma) 1937 RCA data sheet\u003c\/p\u003e\n\u003cp\u003eVplate=425V, Vgrid=-15V Iplate=29.2ma Gm=5100 (NOS = 30ma) 1937 RCA data sheet\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003e1 TUBE, NOT A PAIR \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e1608=801 specs with mu raised to 20 versus 801\/801A mu = 8\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003e1608 has a 2.5V filament, 801 and 801A has a 7.5V filament\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e1608: quick heating filament: 2.5V filament @ 2.5amps\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":664787661,"sku":"1608rca","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1608a.jpg?v=1571438807"},{"product_id":"826-ken-rad-nos-1942-pair","title":"(!!!) (Best Pair) 826 Ken Rad NOS 1942 same date codes original boxes strong emission","description":"\u003cp\u003e1 matched pair) 826 Ken Rad NOS 1942 same date codes (K3) original boxes\u003c\/p\u003e\n\u003cp\u003e1) 54\/30\u003c\/p\u003e\n\u003cp\u003e1) 51\/30\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- strong emission and bright filaments\u003c\/p\u003e\n\u003cp\u003e- excellent pair\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":674036321,"sku":"826pr","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_203d1754-6d06-4ea8-8b13-2cd6243bbe8c.jpg?v=1618424887"},{"product_id":"gz30-5z4gt-mullard-uk-v1","title":"(!!!) (Best Single) GZ30=5Z4GT Mullard UK NOS 1962 (56\/30 and 56\/30) (rare) 1% section balance","description":"\u003cp\u003eGZ30=5Z4GT Mullard UK NOS \"D\" getter 1962 (5H1-B2F3) very good printing\u003c\/p\u003e\n\u003cp\u003e56\/40\u003c\/p\u003e\n\u003cp\u003e56\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e(5Z4GT has same ratings as 5Y3GT, but is indirectly heated like a 5AR4)\u003cbr\u003e\u003cbr\u003e- Dared\u003c\/p\u003e\n\u003cp\u003e- Leak TL 10.1\u003c\/p\u003e\n\u003cp\u003e- Woo Audio WA22\u003c\/p\u003e\n\u003cp\u003e- Woo Audio WA5LE\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"GZ30","offer_id":703465857,"sku":"GZ30","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_fd29671e-4fd9-44c2-ac6d-733b48665d3d.jpg?v=1772837252"},{"product_id":"6384-tungsol-p7","title":"(!!!!!) (Best Overall Pair) JAN-6384 Tungsol low hours\/test like new 1967-1972 (68.5ma and 66ma)","description":"\u003cp\u003e1 matched pair) JAN-6384 Tungsol low hours\/test like new - \u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003etop getters like new - in Tungsol boxes\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e1 tube) 66ma Gm=5200 (1970-1972)\u003c\/p\u003e\n\u003cp\u003e1 tube) 68.5ma Gm=5450 (1967-1968)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eVplate=250V\u003c\/p\u003e\n\u003cp\u003eVscreen=250V\u003c\/p\u003e\n\u003cp\u003eVgrid=-25V\u003c\/p\u003e\n\u003cp\u003eNOS mA range = 60-70ma\u003c\/p\u003e\n\u003cp\u003eNOS Gm range = 5000-5400 \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6384 Tungsol pair","offer_id":742779425,"sku":"6384pair","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_48d60ca1-23eb-4eaa-86ba-a3c8c8e1ab34.jpg?v=1726937017"},{"product_id":"12x4-rv5","title":"12X4 RCA branded Westinghouse NOS black plates \"D\" getter branded 1962 era (49\/40 and 50\/40)","description":"\u003cp\u003e12X4 RCA branded Westinghouse NOS black plates \"D\" getter branded 1962 era\u003c\/p\u003e\n\u003cp\u003e49\/40\u003c\/p\u003e\n\u003cp\u003e50\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- Dynaco PAS-2, PAS-3\u003cbr\u003e- Juicy Music Peach II pre-amp\u003cbr\u003e- car radios\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":779540817,"sku":"12X4","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_b6fd30fd-6b49-4774-a165-24e2f21b25f8.jpg?v=1752959869"},{"product_id":"3s4-tungsol-pair","title":"(!!!) (Best Pair) VT-174=3S4 Tungsol NOS 1943 (100\/60 and 100\/60)","description":"\u003cp\u003e1 pair) VT-174=3S4 Tungsol NOS 1943\u003c\/p\u003e\n\u003cp\u003e1 tube) 100\/60\u003c\/p\u003e\n\u003cp\u003e1 tube) 100\/60\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on B\u0026amp;K\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- Bottlehead Quickie preamp 2010-2013\u003cbr\u003e- WWII Walkie Talkie\u003cbr\u003e- Analog Squared TU-5\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":780725397,"sku":"3S4pr","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_5b71013e-3f79-4ae5-9ff1-fa15e466e6e9.jpg?v=1672852006"},{"product_id":"300a-western-electric-engraved-base-circa-1933","title":"(!!!!) (RARE SINGLE) 300A Western Electric Engraved Base circa 1933 (60ma @ 300Vplate) (payment via wire transfer or credit card) (FREE shipping)","description":"\u003cp\u003e300A Western Electric Engraved Base circa 1933 nice condition - \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e$6299.99\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003epayment via wire transfer or credit card only\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(128, 255, 0);\"\u003e\u003cstrong\u003efree shipping via UPS or DHL\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 255, 0);\"\u003e\u003cstrong\u003eAMPLITREX AT1000 TEST DATA:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eVfil=5VDC\u003c\/p\u003e\n\u003cp\u003eVplate=300VDC\u003c\/p\u003e\n\u003cp\u003eVgrid=-56.5VDC\u003c\/p\u003e\n\u003cp\u003eIplate=60ma\u003c\/p\u003e\n\u003cp\u003eGm=4750\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVfil=5VDC\u003c\/p\u003e\n\u003cp\u003eVplate=400VDC\u003c\/p\u003e\n\u003cp\u003eVgrid=-80.5VDC\u003c\/p\u003e\n\u003cp\u003eIplate=71ma\u003c\/p\u003e\n\u003cp\u003eGm=4850\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(128, 255, 0);\"\u003e\u003cstrong\u003eTest on TV7D\/U = 72\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(128, 255, 0);\"\u003e\u003cstrong\u003estrong single\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eoriginal box - poor condition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e300A data sheet\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":781590897,"sku":"300A","price":5888.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_2fa692bf-2ae3-451e-91ae-d86f560b5c22.jpg?v=1720477988"},{"product_id":"m8137-cv4004-12ax7-mullard-branded-philips-box-plates-nos-1966","title":"(!!!!!) (Recommended Single) M8137=CV4004=12AX7 Mullard branded Philips box plates NOS 1966 (Gm=1500\/1400 and 1.0\/0.8mA)","description":"\u003cp\u003e1 low noise tube) M8137=CV4004=12AX7 Mullard branded Philips box plates NOS 1966\u003c\/p\u003e\n\u003cp\u003eGm=1500 (1.0ma)\u003c\/p\u003e\n\u003cp\u003eGm=1400 (0.8ma)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eGood mA = 0.9-1.0mA+\u003c\/p\u003e\n\u003cp\u003eGood Gm range = 1500-1600+\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003e- EAR 834P\u003cbr\u003e- EAR 864\u003cbr\u003e- Aestetix Rhea phono\u003cbr\u003e- Aestetix Calypso, Io phono\u003cbr\u003e- Art Audio phono\u003cbr\u003e- Audio Research linestage \u003cbr\u003e- Shindo linestage\u003cbr\u003e- Jolida 1000 CD player\u003cbr\u003e- CAT SL-1 Signature Mark III preamp\u003cbr\u003e- Fender Pro Reverb 1967\u003cbr\u003e- Pathos Acoustics T.T. Hybrid Integrated amp (INPOL)\u003cbr\u003e- Belari 129 phono\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"M8137=CV4004=12AX7 Mullard branded Philips box plates NOS 1966","offer_id":791787461,"sku":"m8137mull","price":188.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_7f8abf68-fb1c-484c-8030-a7249a96afe2.jpg?v=1681333336"},{"product_id":"1l6-sylvania-nos-1950-pair","title":"(!!!!) (Best Pair) 1L6 Sylvania NOS 1950 same date codes (20\/16 and 19\/16)","description":"\u003cp\u003e1 pair) 1L6 Sylvania NOS 1950 same date codes\u003c\/p\u003e\n\u003cp\u003e1) 20\/16\u003c\/p\u003e\n\u003cp\u003e1) 19\/16\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on TV-7D\/U\u003c\/p\u003e\n\u003cp\u003etesting above 20\/16 is strong\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":795450845,"sku":"1L6","price":148.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_18c69080-b3ea-4ac3-a1c1-f9c6a46ca21d.jpg?v=1618572899"},{"product_id":"6bl7gt-ge-pair-10","title":"(!!!!) (Best Pair) 6BL7GT GE \"D\" getter NOS 1957 same build (34\/36ma and 37\/32ma)","description":"\u003cp\u003e1 pair) 6BL7GT GE \"D\" getter NOS 1957 same build\u003c\/p\u003e\n\u003cp\u003e1 tube) 37\/32ma Gm=7200\/6700 (rebranded RCA 1957) (KM) in 6BL7GTA box\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003e1 tube) 34\/36ma Gm=7200\/7200 (1957)\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003e- Single Power MPX3 SE\u003cbr\u003e- Cary 1610se\u003c\/p\u003e\n\u003cp\u003e(Vfil=6.3V @ 1.5A, Vplate max=500V, Iplate max=60ma, Pout max = 12 watts total for both triode sides)\u003cbr\u003eThe 6BL7GTA is interchangeable with a 6BL7GT but differs from it in having\u003cbr\u003ean improved section 1 for increased life as an oscillator, and controlled zero-bias\u003cbr\u003eplate current in both sections\u003cbr\u003eTypical Characteristics Class A Amp:\u003cbr\u003eVplate= 250V\u003cbr\u003eIplate= 42ma\u003cbr\u003eVgrid= -9\u003cbr\u003eRp= 2150 ohms\u003cbr\u003eMu= 15\u003cbr\u003eGm= 6200 for 6BL7 (RCA manual 1953) and 7000 mhos for 6BL7GTA (GE Manual 1957)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":813959653,"sku":"6BL7GTpr","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_04803f5e-8dec-4cae-bad8-bf45449704fd.jpg?v=1732087955"},{"product_id":"em34-cv394-mullard-nos-early-1950-s-v1","title":"EM34=CV394 Mullard Germany NOS early 1950's (1 in stock)","description":"\u003cp\u003e1) EM34=CV394 Mullard Germany NOS early 1950's red painted glass\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWayne Kerr CT530\u003cbr\u003eSalora 671-V 1950\u003cbr\u003eSABA Bodensee Automatik 3DS 1954\u003cbr\u003eGrundig 4095 1956\u003cbr\u003eGrundig 8090 1957\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":845173861,"sku":"em34","price":124.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_e071a479-1592-4571-86dd-05979d631b8a.jpg?v=1581195580"},{"product_id":"244a-we-nos-st-14-engraved-base-1930s-single","title":"(!!!) (Best Pair) 244A Western Electric NOS ST-14 \"Engraved Base\" 1930's - 1940 (4.1ma and 5ma) (close Gm)","description":"\u003cp\u003e1 pair) 244A Western Electric NOS ST-14 \"Engraved Base\" 1930's\u003c\/p\u003e\n\u003cp\u003e1 tube) 5.0ma Gm=900\u003c\/p\u003e\n\u003cp\u003esupport rods slightly tilted inside glass, but plate and cathode are perfectly centered\u003c\/p\u003e\n\u003cp\u003etilt does not effect tube performance\u003c\/p\u003e\n\u003cp\u003e1 tube) 4.1ma Gm=800\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVplate=120V\u003c\/p\u003e\n\u003cp\u003eVgrid=-6V\u003c\/p\u003e\n\u003cp\u003eGood Ma = 4ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 890\u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cp\u003e2V Filament\u003c\/p\u003e\n\u003cp\u003eDeveloped in 1929\u003c\/p\u003e\n\u003cp\u003eSuperb Sound with Mesh-Plate\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":869609037,"sku":"244Apair","price":279.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/244ap1.jpg?v=1571438847"},{"product_id":"352a-we-nos-1964-pair","title":"(!) (Best Pair) 352A WE NOS 1964 original boxes (1 pair)","description":"\u003cp\u003e1 pair) 352A WE NOS 1964 \"D\" getter original boxes \u003c\/p\u003e\n\u003cp\u003e1 tube) 24\/16\u003c\/p\u003e\n\u003cp\u003e1 tube) 25\/16\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e(352A=Dual-Diode Triode, similar to 292A and 6R7G)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":949196145,"sku":"352Apair","price":144.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_15c14c93-fc13-479b-bac2-522520409d65.jpg?v=1703254974"},{"product_id":"jrc-5751-rcap1","title":"(!!!) (Best Pair) JRC-5751 RCA NOS black plates double mica 1962 (2.7\/2.3ma and 2.7\/2.9ma) (similar to Command Series)","description":"\u003cp\u003e1 low noise pair) JRC-5751 RCA NOS black plates, double mica 1962 \u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e(similar to Command Series)\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e1 tube) 2.7\/2.9ma Gm=1900\/2000\u003c\/p\u003e\n\u003cp\u003e1 tube) 2.7\/2.3ma Gm=1900\/1700\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e(RCA are very sweet sounding and a high quality 5751; low noise and good bass)\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e- McIntosh C500T Tube Preamplifier \u003cbr\u003e- Aesthetix\u003cbr\u003e- VTL 7.5 preamp\u003cbr\u003e- Conrad Johnson\u003cbr\u003e- Fender Dual Showman 1972\u003cbr\u003e- Jolida CD player\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":984369924,"sku":"5751rca","price":198.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_3d5e203b-d323-430a-9efd-6cc3daf1e740.jpg?v=1773249953"},{"product_id":"30-brimar-pair","title":"(!!!) (Best Pair) 30 Brimar BVA made in USA but might be made in UK in white boxes 1940's (3.1ma and 3.3ma)","description":"\u003cp\u003e1 Pair) 30 Brimar BVA made in USA but might be made in UK in white boxes 1940's \u003cbr\u003e1 tube) 3.1ma Gm=900\u003cbr\u003e1 tube) 3.3ma Gm=900\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eNOS Ma = 3ma\u003c\/p\u003e\n\u003cp\u003eNOS Gm = 800-900\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":986565944,"sku":"30","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/30brim.jpg?v=1571438868"},{"product_id":"5z3g-rca-1957","title":"(!!) (SINGLE) 5Z3G RCA NOS 1957 (10 in stock) (special price)","description":"\u003cp\u003e10) 5Z3G RCA NOS 1957 reboxed\u003c\/p\u003e\n\u003cp\u003esome have slightly tilted glass\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e5Z3 with 4pins = same specs as 5U4G octal base\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":1000525368,"sku":"5Z3G","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_821ee020-9e26-4775-9b7f-c6b7c20de1c3.jpg?v=1727963572"},{"product_id":"809-rca-ceramic-base-pair","title":"(!!!) (BEST PAIR) 809 RCA ceramic base like new 1940 era (68\/42 and 70\/42)","description":"\u003cp\u003e1 pair) 809 RCA ceramic base like new 1940 era in white boxes - large side getters\u003c\/p\u003e\n\u003cp\u003e1 tube) 68\/42\u003c\/p\u003e\n\u003cp\u003e1 tube) 70\/42\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on TV-7D\/U\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":1046500936,"sku":"809pr","price":148.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_57201609-1802-4757-99f8-8f8b5f25f791.jpg?v=1731436598"},{"product_id":"ecc808-6kx8-telefunken-p1","title":"(!!!) (BEST PAIR) ECC808=6KX8 Telefunken Diamond Bottom NOS 1963-1966 (1.1\/1.3ma and 1.3\/1.0ma)","description":"\u003cp\u003e1 matched pair) ECC808=6KX8 Telefunken Diamond Bottom NOS 1963-1966 in white boxes\u003c\/p\u003e\n\u003cp\u003e1 tube) 1.1\/1.3ma Gm=1500\/1600 1963\u003c\/p\u003e\n\u003cp\u003e1 tube) 1.3\/1.0ma Gm=1600\/1500 1966\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eVplate=250V\u003c\/p\u003e\n\u003cp\u003eVgrid=-1.9V\u003c\/p\u003e\n\u003cp\u003eGood Ma = 1.0-1.2ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 1500-1600\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eB=Berlin\u003c\/p\u003e\n\u003cp\u003eTubes were \"Factory Sealed \"\u003c\/p\u003e\n\u003cp\u003e(5 are used in the 4 Channel Echolette PA amp made in Germany)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":1095463412,"sku":"ECC808","price":178.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_1_88f4b09e-95c4-4683-ade9-0d66443848f1.jpg?v=1770150084"},{"product_id":"vt-52-sylvania-nos-1940s-original-box","title":"(!!) (Recommended Single) VT-52 Sylvania NOS 1940's original box (55ma)","description":"\u003cp\u003e1 tube) VT-52 Sylvania NOS 1940's original box \u003c\/p\u003e\n\u003cp\u003e55ma\u003c\/p\u003e\n\u003cp\u003eGm=2600\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eNOT A PAIR\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVplate=225V\u003c\/p\u003e\n\u003cp\u003eVgrid=-30V\u003c\/p\u003e\n\u003cp\u003eGood mA range 50-65mA\u003c\/p\u003e\n\u003cp\u003eGood Gm range 2500-3000+\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":1111125976,"sku":"VT-52","price":188.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/vt52syl.jpg?v=1571438894"},{"product_id":"6dq6b-sylvania-pair","title":"(!!) (BEST PAIR) 6DQ6B Sylvania NOS 1960's same build (78ma and 80ma)","description":"\u003cp\u003e1 pair) 6DQ6B Sylvania NOS 1960's\u003c\/p\u003e\n\u003cp\u003e1 tube) 78ma Gm=8100 Sylvania\u003c\/p\u003e\n\u003cp\u003e1 tube) 80ma Gm=8200 Sylvania Philco\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":1129841920,"sku":"6DQ6Bpr","price":18.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_a7407221-7a4b-4d33-b8b3-27e61ccb2686.jpg?v=1657560185"},{"product_id":"350a-we","title":"350A Western Electric used\/good 85% 1947 (78.2ma and Gm=7400)","description":"\u003cp\u003e350A Western Electric used\/good 85% 1947 small getter flashing\u003c\/p\u003e\n\u003cp\u003e78.2ma\u003c\/p\u003e\n\u003cp\u003eGm=7400\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e350A = 350B with top cap for plate connection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eNOS mA range 80-100mA\u003c\/p\u003e\n\u003cp\u003eNOS Gm range 8000-9000\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":1131814048,"sku":"350A","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_7d1342ee-5fb4-4197-80c9-26e6ab038f45.jpg?v=1757795108"},{"product_id":"6sl7gt-rca-p1a","title":"(!!!!) (Best Overall Pair) 6SL7GT RCA NOS black plates gray coated glass 1950's (2.3\/2.4ma and 2.2\/2.4ma)","description":"\u003cp\u003e1 low noise pair) 6SL7GT RCA NOS black plates gray coated glass 1950's\u003c\/p\u003e\n\u003cp\u003e1 tube) 2.3\/2.4ma Gm=1500\/1600 \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1 tube) 2.2\/2.4ma Gm=1400\/1500 \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- Ampeg Heritage B-15 \u003cbr\u003e- Alessandro Itallian Greyhound jazz amp\u003cbr\u003e- Alessandro Black and Tan 2005\u003cbr\u003e- Almarro A318B\u003cbr\u003e- Eddie Current\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6SL7GT RCA NOS Pair","offer_id":1308996252,"sku":"6SL7GTpair","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/4_57fd8a22-7f91-42dc-bb2a-e77bb50074ab.jpg?v=1779863862"},{"product_id":"ec86-telefunken-p1a","title":"(!!) (BEST PAIR #2) EC86 Telefunken Germany \u003c\u003e bottom gold pins NOS 1960 (10.5ma and 11.2ma) (close Gm)","description":"\u003cp\u003e1 Pair) EC86 Telefunken Germany \u0026lt;\u0026gt; bottom gold pins NOS 1960 same date codes\u003c\/p\u003e\n\u003cp\u003e1 tube) 10.5ma Gm=14,400\u003c\/p\u003e\n\u003cp\u003e1 tube) 11.2ma Gm=14,500\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on Amplitrex\u003c\/p\u003e\n\u003cp\u003eVplate=185V\u003c\/p\u003e\n\u003cp\u003eGood Ma range 10-13ma\u003c\/p\u003e\n\u003cp\u003eGood Gm range 13-15,000\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":1452105924,"sku":"EC86tele","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/4_781306bb-d407-459e-ac7f-f61c4321a630.jpg?v=1778138795"},{"product_id":"6350-sylvania-black-plates-nos-p1","title":"(!!!!!) (Recommended Pair) 6350 Sylvania black plates NOS 1960 era \"D=SQUARE\" getter (9.4\/8.2ma and 10.2\/8.4ma)","description":"\u003cp\u003e1 low noise pair) 6350 Sylvania black plates NOS 1960 era \"D=SQUARE\" getter\u003c\/p\u003e\n\u003cp\u003e1 tube) 9.4\/8.2ma Gm=4300\/4100 (GB-6350) 1963\u003c\/p\u003e\n\u003cp\u003e1 tube) 10.2\/8.4ma Gm=4400\/4200 (1960 era)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eVplate=150V\u003c\/p\u003e\n\u003cp\u003eVgrid=-5V\u003c\/p\u003e\n\u003cp\u003eGood mA per section = 9-11ma\u003c\/p\u003e\n\u003cp\u003eGood Gm per section = 4300-5000\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003erecommended for:\u003c\/p\u003e\n\u003cp\u003e- VTL Wotan MB1250, VTL MB450, VTL MB300, VTL 225 Deluxe, VTL Deluxe 140, VTL Stereo 120\/50, VTL ST150\u003c\/p\u003e\n\u003cp\u003e- VTL Siegfried\u003c\/p\u003e\n\u003cp\u003e- Joule Electra LA-150 (mk2)\u003c\/p\u003e\n\u003cp\u003e- Joule Electra LA 100 Mk.III\u003c\/p\u003e\n\u003cp\u003e- Shindo-lab Corton\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6350 Sylvania black plates","offer_id":3457795332,"sku":"6350","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_1_11122dd4-ea56-4b9f-95a9-336947588f1b.jpg?v=1768080783"},{"product_id":"6v6gta-rca-used-v1","title":"(!!!!) (Good Value Pair) 6V6GTA RCA used\/good 1962 and 1970's (30ma and 31.5ma)","description":"\u003cp\u003e1 pair) 6V6GTA RCA gray oval plates used\/good 1962 and 1970's same build\u003c\/p\u003e\n\u003cp\u003e1 tube) 31.5ma Gm=3300 (1962) (MR) bottom getter\u003c\/p\u003e\n\u003cp\u003e1 tube) 30.0ma Gm=3300 1970's - side getter\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- Fender Musicmaster Bass Guitar 1970\u003cbr\u003e- Fender Champion 600 (new)\u003cbr\u003e- Fender Tweed Champ 1960\u003cbr\u003e- Victoria Amp Model # 20122\u003cbr\u003e- Fender 57 Champ Reissue\u003cbr\u003e- Fender Deluxe 1963\u003cbr\u003e- Fender Tweed Champ with 5F1 circuit\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6V6GTA RCA used\/pair","offer_id":3857407300,"sku":"6V6GTArca","price":88.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_01fd915d-4e3f-48c5-abba-447ccedb17ea.jpg?v=1664029041"},{"product_id":"6f8g-rayp1","title":"(!!!!) (BEST PAIR) 6F8G=VT-99 Raytheon NOS 1945 era (8.6\/10.2ma and 9.8\/9.0ma)","description":"\u003cp\u003e1 pair) 6F8G=VT-99 Raytheon NOS 1945 era - PARALLEL BLACK PLATES\u003c\/p\u003e\n\u003cp\u003e1 tube) 8.6\/10.2ma Gm=2700\/3100\u003c\/p\u003e\n\u003cp\u003e1 tube) 9.8\/9.0ma Gm=3200\/3000\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eGood Ma range 7-10ma\u003c\/p\u003e\n\u003cp\u003eGood Gm range 2400-2600 \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e- 6F8G is electrically the same as a 6SN7GT but has a top cap for 1 grid connection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003einformation:\u003c\/p\u003e\n\u003cp\u003eGE, Sylvania and Raytheon have mirror image parallel black plates\u003c\/p\u003e\n\u003cp\u003eRCA and Ken Rad have staggered black ribbed plates\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":4158187588,"sku":"6F8Gnos","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_27da6714-bac0-4d68-9ef3-e81149b988c3.jpg?v=1773786413"},{"product_id":"ecc31-cv1285-6n7g-mullard-single-2","title":"(!!) ECC31=CV1285=6N7G Mullard black plates NOS 1950's (7.4\/9.4ma)","description":"\u003cp\u003e1 tube) ECC31=6N7G Mullard NOS 1950's black plates black base in white box  mis-matched triode sections\u003c\/p\u003e\n\u003cp\u003e7.4ma Gm=2600\u003c\/p\u003e\n\u003cp\u003e9.4ma Gm=3100\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eVplate=200V, Vgrid=-2V, Good Iplate range 6-9ma\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eECC31=CV1285 Mullard: (6N7GT substitute)\u003cbr\u003e----------------------------------------------------------\u003cbr\u003eThe ECC31 uses a common cathode for both triode sections\u003cbr\u003e and is equivalent to a 6N7G. Except for interelectrode capacitances,\u003cbr\u003e and a different pinout, this tube is identical electrically with type ECC32, but CANNOT be substituted for a ECC32 (ECC31 mu = 32, ECC32 mu=32)\u003c\/p\u003e\n\u003cp\u003eECC31 SONIC FEEDBACK:\u003cbr\u003e--------------------\u003cbr\u003eOne might think you would praise the Mullard ECC31 to justify the high price you ask. But that's not true, they sound so extremely good the price IS justified (because you cannot get this sound cheaper): My just for fun stereo amp is a Philco type 45 driven by Ken-Rad 6N7GT's. I was very pleased with the sound, so I wanted to know how the praised Mullard ECC31\/CV1285 \u003cbr\u003emay sound....unbelievable! Lots of realistic space, rhythm, great tonal balance with very truthful sound of the instruments, natural colours...this tube gives POWER and authority to the 45 flew power triode! Stunning! Going back to the Ken-Rad's are several steps backwards: Air is lost, less colours, less strong, narrow, the music doesn't make so much fun anymore than before, the musicians seem to play funny uninspirated. The ECC31=CV1285 may be a little \u003cbr\u003eunderestimated due to the common cathode, but this is a big mistake. Running in parallel is not \"political correct\", but it sounds absolutely outstanding!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":4409092292,"sku":"ECC31","price":118.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/ecc3169.jpg?v=1571438935"},{"product_id":"12at7-mullard-pair-4","title":"(!!!!) (Recommended Pair) ECC81=12AT7 Philips by Mullard NOS 1966-1970 (10\/9.2ma and 9.3\/8.6ma) (Close Gm matching) 1-5% matched","description":"\u003cp\u003e1  low noise pair) ECC81=12AT7 Philips by Mullard UK NOS 1966-1970  \u003c\/p\u003e\n\u003cp\u003e1 tube) 10\/9.2ma Gm=5100 and 5100\u003c\/p\u003e\n\u003cp\u003e1 tube) 9.3\/8.6ma Gm=5200 and 5000\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003e- Sweet and Smooth 12AT7\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTested on Amplitrex AT1000\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLow Noise and not microphonic\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGood Ma range 8-10ma\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGood Gm range 5000-5500\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJolida JD303\u003c\/li\u003e\n\u003cli\u003eGuitar amps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":4758098820,"sku":"ecc81_mullminipair","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_b131e860-9fa1-47ba-83c4-bd69b89306ac.jpg?v=1772901277"},{"product_id":"tube-identification-fee-refundable-with-order","title":"(!!!!!) Tube Recommendation Fee $25 - refundable with order (1 piece of audio gear; guitar amp, preamp, power amp, DAC, mic)","description":"\u003cp\u003eTube World Express will recommend tubes for 1 piece of audio gear:\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- Guitar amp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- DAC\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- Preamp or phono-stage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- Power amplifier\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- Microphone\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- Compressor\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- Radio\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e\u003cstrong\u003e- Juke box\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003e$25 fee per audio unit, fee is refundable with tube order\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Tube Recommendation Fee - refundable with order","offer_id":5862917124,"sku":"technical_fee","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/tubey_identification_ae4f01cf-eda5-4d23-9a73-fff729638a41.png?v=1571438938"},{"product_id":"6lq6-rayp1","title":"(!!!!) (Best Pair #1) 6LQ6=6JE6C Raytheon Japan NOS 1970's (112ma and 109ma)","description":"\u003cp\u003e1 pair) 6LQ6=6JE6C Raytheon Japan NOS 1970's same date codes\u003c\/p\u003e\n\u003cp\u003e1 tube) 112ma Gm=10,700\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e1 tube) 109ma Gm=10,600\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eTested on Amplitrex AT1000\u003c\/p\u003e\n\u003cp\u003eVplate=175V\u003c\/p\u003e\n\u003cp\u003eVscreen=125V\u003c\/p\u003e\n\u003cp\u003eVgrid=-25V\u003c\/p\u003e\n\u003cp\u003eIplate GOOD range 70-90ma\u003c\/p\u003e\n\u003cp\u003eGm GOOD range 8,500 - 10,000\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":10953466820,"sku":"6LQ6pr","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_7dd0c4c3-aa0c-4482-85cc-122ebb19da92.jpg?v=1763603482"},{"product_id":"448a-western-electric-tipped-top-1965-pair-1a","title":"(!!!) (Best Pair #3) 448A Western Electric tipped top used\/strong 1965 (30ma and 32ma) (Matched on Amplitrex)","description":"\u003cp\u003e1 pair) 448A Western Electric \"tipped top\" used\/strong D getter halo 1965 in white boxes\u003c\/p\u003e\n\u003cp\u003e1 tube) 30ma Gm=27,000\u003c\/p\u003e\n\u003cp\u003e1 tube) 32ma Gm=28,700 \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAmplitrex Test Data:\u003c\/p\u003e\n\u003cp\u003eVplate=135V\u003c\/p\u003e\n\u003cp\u003eVscreen=135V\u003c\/p\u003e\n\u003cp\u003eVgrid=-2.5V\u003c\/p\u003e\n\u003cp\u003eGood Ma range 18-25ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 25,000\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eDIY pentode\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":12740486980,"sku":"448a_pair","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_32d33086-51df-491d-9d70-46e697b90219.jpg?v=1751813087"},{"product_id":"5687wb-ge-nos-rebranded-ck-5687wb-raytheon-black-plates-p11","title":"(!!!!) (BEST GE PAIR #3) 5687WB GE NOS rebranded CK-5687WB Raytheon black plates 1970's (Audio Note, Manley, Modwright) (35.8\/37.5ma and 34.6\/36.2ma)","description":"\u003cp\u003e1 low noise pair) 5687WB GE NOS rebranded CK-5687WB Raytheon black plates 1970's\u003c\/p\u003e\n\u003cp\u003e1 tube) 35.8\/37.5ma Gm=11,100\/11,400\u003c\/p\u003e\n\u003cp\u003e1 tube) 34.6\/36.2ma Gm=11,400\/11,600\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eGood Ma range 30-35ma\u003c\/p\u003e\n\u003cp\u003e(tubes etched 5687WB)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e7119 is best sub for a 5687 and visa versa\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- Modwright preamp\u003cbr\u003e- Audio Note DAC 4\u003cbr\u003e- Audio Note Jinro amp\u003cbr\u003e- Audio Note L3\u003cbr\u003e- Audio Note M3 preamp\u003cbr\u003e- Manley\u003c\/p\u003e\n\u003cp\u003e- Marsh\u003cbr\u003e- Ray Samuels Raptor and B52 \u003cbr\u003e- Aria VW5XL\u003cbr\u003e- Modwright Sony DVP999ES\u003cbr\u003e- Audion 845 Black Shadow\u003cbr\u003e- Bottlehed Smack\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":13119993476,"sku":"5687wbge_pair","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_8ff5d951-443f-4f05-a614-8c3d005cc4eb.jpg?v=1761087797"},{"product_id":"copy-of-ecc808-6kx8-mullard-made-in-germany-by-valvo-nos-1969-same-date-codes-1-matched-1-3ma-x-4-sections-matched-on-amplitrex","title":"(!) (BEST PAIR) ECC808=6KX8 Mullard Made in Germany by VALVO NOS 1969 same date codes (1.1\/1.3ma and 1.2\/1.1ma)","description":"\u003cp\u003e1 matched pair) ECC808=6KX8 Mullard Made in Germany by VALVO NOS ribbed plates 1969 \u003c\/p\u003e\n\u003cp\u003e1 tube) 1.1\/1.3ma Gm=1500\/1800\u003c\/p\u003e\n\u003cp\u003e1 tube) 1.2\/1.1ma Gm=1700\/1600\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eVplate=250V\u003c\/p\u003e\n\u003cp\u003eVgrid=-1.9V\u003c\/p\u003e\n\u003cp\u003eGood Ma = 1.2ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 1600\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e(5 are used in the 4 Channel Echolette PA amp made in Germany)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"ECC808 Mullard by Valvo","offer_id":13874309956,"sku":"ECC808valvo","price":128.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/ecc808v1_f485fbe4-b84b-4880-ab76-23933b2f0809.jpg?v=1571438980"},{"product_id":"5y3gt-rcamotp1","title":"(!!!) (BEST SOUNDING PAIR) 5Y3GT RCA Motorola NOS 1970 (56-60\/40 x 2 tubes)","description":"\u003cp\u003e1 pair) 5Y3GT RCA Motorola NOS 1970 1-2% matched\u003c\/p\u003e\n\u003cp\u003e1 tube) 56\/40 and 60\/40  \u003c\/p\u003e\n\u003cp\u003e1 tube) 56\/40 and 60\/40  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":18486310084,"sku":"5Y3GTrcapair","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_700c4730-4f83-4434-90c3-3fad50ea0048.jpg?v=1754942983"},{"product_id":"6bm8-holland-p1a","title":"(!!!!!) (Best Pair #1) ECL82=6BM8 Philips and Philips Miniwatt Holland NOS 1963-1966 (2.1\/39ma and 2.0\/40ma) 1-2% matched","description":"\u003cp\u003e1 pair) ECL82=6BM8 Philips and Philips Miniwatt Holland NOS 1963-1966\u003c\/p\u003e\n\u003cdiv itemprop=\"description\" class=\"description contentsection\"\u003e\n\u003cdiv class=\"content-block\"\u003e\n\u003cp\u003e1 tube) 2.1ma Gm=2300 and 39ma Gm=6600 branded Philips 1966\u003c\/p\u003e\n\u003cp\u003e1 tube) 2.0ma Gm=2300 and 40ma Gm=6600 branded Miniwatt Import 1963\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on Amplitrex\u003c\/p\u003e\n\u003cp\u003e1 section triode) Good Ma = 2.0-2.5ma and Good Gm=2200-2500\u003c\/p\u003e\n\u003cp\u003e1 section pentode) Good Ma = 30-35ma and Good Gm=5500-6500\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003eAudio Note M3, M6, M9\u003cbr\u003eAudio Note L2 Custom linestage - Response Audio, NY (2008)\u003cbr\u003eAudio Note 2.1 kit Level C\u003cbr\u003eAudio Note 3.1 kit\u003cbr\u003eSansui\u003c\/p\u003e\n\u003cp\u003eAudio Note preamps and DACS (2.1B, 2.1C)\u003cbr\u003eAudio Note DAC 3.1 Signature\/Modified\u003cbr\u003eShindo Concertino 300B amp\u003cbr\u003eEastern Electric Minimax\u003cbr\u003eEastern Electric Minimax BBA \"Buffer Booster Amplifier\"\u003cbr\u003eKLH Eight radio 1960-1962\u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Tube World","offers":[{"title":"6BM8 Philips Holland","offer_id":18762215172,"sku":"6BM8pr","price":148.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/4_5129196f-c8c3-48c8-bf2f-c39e31fd7557.jpg?v=1778483439"},{"product_id":"e90f-6bh6-amperex-holland-p1","title":"(!!) (Best Pair) E90F=6BH6 Amperex Holland NOS 1963 (7.3\/7.5ma) (Marantz 8B)","description":"\u003cp\u003e1 pair) E90F=6BH6 Amperex Holland NOS 1963 (Heerlen plant)\u003c\/p\u003e\n\u003cp\u003e1 tube) 7.3ma Gm=4600\u003c\/p\u003e\n\u003cp\u003e1 tube) 7.5ma Gm=4500\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on Amplitrex\u003c\/p\u003e\n\u003cp\u003eGood Ma = 6.5-7.5ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 4000-4500\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003e(best tube for a Marantz 8B)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Tube World Express","offers":[{"title":"Default Title","offer_id":19795192004,"sku":"7693pair","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_fb8255ba-2466-45cc-9324-4a5d5c88659f.jpg?v=1771870985"},{"product_id":"6kv6a-ge","title":"(!) (PAIR) 6KV6A GE NOS (38.5ma and 36ma)","description":"\u003cp\u003e1 pair) 6KV6A GE NOS\u003c\/p\u003e\n\u003cp\u003e1 tube) 38.5ma Gm=5800\u003c\/p\u003e\n\u003cp\u003e1 tube) 36.0ma Gm=6800 GE branded\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTested on Amplitrex (data sheet specs)\u003c\/p\u003e\n\u003cp\u003eVplate=140V\u003c\/p\u003e\n\u003cp\u003eVscreen=140V\u003c\/p\u003e\n\u003cp\u003eVgrid=-24.5V\u003c\/p\u003e\n\u003cp\u003eGood Ma range = 35-40ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 5500-6000\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":19974387972,"sku":"6KV6A","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_bbf0a641-a7c5-4f07-874f-f41e27897c2f.jpg?v=1752101405"},{"product_id":"1619-rca-nos-pair-4","title":"(!!!) (Recommended Pair) 1619 RCA NOS 1960-1964 (52ma and 53ma)","description":"\u003cp\u003e1 pair) 1619 RCA NOS 1960-1964 reboxed \u003c\/p\u003e\n\u003cp\u003e1 tube) 52ma Gm=4800 (1964) in 1965 box\u003c\/p\u003e\n\u003cp\u003e1 tube) 53ma Gm=4620 (1960) in 1965 box\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMatched on Amplitrex\u003c\/p\u003e\n\u003cp\u003eVplate=300V\u003c\/p\u003e\n\u003cp\u003eSvcreen=250V\u003c\/p\u003e\n\u003cp\u003eVgrid=\u003c\/p\u003e\n\u003cp\u003eGood Ma = 44-50ma\u003c\/p\u003e\n\u003cp\u003eGood Gm = 4000\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e2.5 Volt filament\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e15 watts\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":20012500548,"sku":"1619pr","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_a9259520-c11c-4155-937f-3aea9c85b5f7.jpg?v=1692911862"},{"product_id":"7199-sylvania-p1","title":"(!!) (2nd Best Pair) 7199 Sylvania NOS 1960's and 1985 same build (12.5ma\/9.6ma and 12.3\/10.2ma) 1-3% matched","description":"\u003cp\u003e1 pair) 7199 Sylvania gray plates NOS 1960's and 1985 - same build\u003c\/p\u003e\n\u003cp\u003e1 tube) Sylvania faded printing 1960's\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e12.5ma Gm=7300 (pentode section) strong\u003c\/p\u003e\n\u003cp\u003e9.6ma Gm=2500 (triode section) strong\u003c\/p\u003e\n\u003cp\u003e1 tube) Sylvania branded Philips 1985\u003c\/p\u003e\n\u003cp\u003e12.3ma and Gm=7100 (pentode section) strong\u003c\/p\u003e\n\u003cp\u003e10.2ma and Gm=2500 (triode section) strong \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cp\u003e- Bogen BD-212\u003cbr\u003e- Dynaco ST-70, SCA-35\u003cbr\u003e- Ampeg B25, B25B\u003cbr\u003e- Heathkit AA-111\u003cbr\u003e- Stromberg Carlson \u003cbr\u003e- Ampex Concerto 1961\u003cbr\u003e- Scott LK 150\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":21126992900,"sku":"7199pr","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_c2e4058f-db12-441c-8cde-35532e0011bb.jpg?v=1643651340"},{"product_id":"5y3gt-philips-holland-nos-1960s","title":"(!!!!!) (BEST Overall Value) 5Y3GT Philips Holland NOS 1960's (6 in stock) (Fender, Supro, Victoria, Decware) (Best Sound for the money)","description":"\u003cp\u003e5Y3GT Philips Holland NOS 1960's\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eRECOMMENDED FOR:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e- Fargen Bordeaux guitar amp\u003c\/p\u003e\n\u003cp\u003e- Fender Tremolux 5E9-A 1954 (Tungsol and RCA)\u003c\/p\u003e\n\u003cp\u003e- Fender Champ 5F1\u003c\/p\u003e\n\u003cp\u003e- Fender 5E3\u003c\/p\u003e\n\u003cp\u003e- Fender Vibro Champ 1966\u003c\/p\u003e\n\u003cp\u003e- Fender Deluxe\u003c\/p\u003e\n\u003cp\u003e- Fender EC Vibro Champ 2012\u003c\/p\u003e\n\u003cp\u003e- Supro 1624 (Led Zeppelin I)\u003c\/p\u003e\n\u003cp\u003e- Decware ZP3 phono\u003c\/p\u003e\n\u003cp\u003e- Decware CSP2 Preamp\u003c\/p\u003e\n\u003cp\u003e- Melody 300B mono amps\u003c\/p\u003e\n\u003cp\u003e- Dared SL-2000a\u003c\/p\u003e\n\u003cp\u003e- Victoria\u003c\/p\u003e\n\u003cp\u003e- Heathkit AR-2 1954\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":21724584580,"sku":"5Y3GTphilips","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/5y3gtphil1.jpg?v=1571439008"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/collections\/featdeals-collection3.jpg?v=1389190797","url":"https:\/\/tubeworldexpress.com\/collections\/featured\/1608.oembed","provider":"Tube World Express","version":"1.0","type":"link"}