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JAN-6X4WA Sylvania used\/good 1967 (48\/40 and 50\/40)","description":"\u003cp\u003eJAN-6X4WA Sylvania used\/good 1967\u003c\/p\u003e\n\u003cp\u003e48\/40\u003c\/p\u003e\n\u003cp\u003e50\/40\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":582194085,"sku":"6X4WA","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_8ee938ff-6cef-4058-9b9f-58bfe9479882.jpg?v=1675235214"},{"product_id":"412a-western-electric-nos-1981","title":"412A Western Electric NOS 1981 (54\/40 and 54\/40)","description":"\u003cp\u003e412A Western Electric NOS 1981 in 1982 box\u003c\/p\u003e\n\u003cp\u003e54\/40\u003c\/p\u003e\n\u003cp\u003e54\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e6754 Bendix=412A Western Electric\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":598862981,"sku":"412A_81","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_fa8f2c1c-0000-4828-a8f0-df3e98f3cfb8.jpg?v=1699039145"},{"product_id":"412a-western-electric-nos-1965","title":"(!!) 412A Western Electric NOS 1968 (52\/40 and 53\/40)","description":"\u003cp\u003e412A Western Electric NOS 1968\u003c\/p\u003e\n\u003cp\u003e52\/40\u003c\/p\u003e\n\u003cp\u003e53\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e6754 Bendix=412A Western Electric\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"412A Western Electric NOS 1968","offer_id":601478557,"sku":"412A","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_c05b11b5-5e75-4d9b-a864-bd8c4cc0020c.jpg?v=1699038993"},{"product_id":"301a-western-electric","title":"(sold out) 301A Western Electric printed base 1965","description":"\u003cp\u003e301A WE NOS 1965 original box (60\/40 and 62\/40 tested on TV-7-D\/U)\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e(301A=similar to type 83 with 1800PIV rating)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eRecommended for:\u003c\/p\u003e\n\u003cp\u003e71B and 90A Western Electric amps\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":606263017,"sku":"301Anos","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/301a65.jpg?v=1571438796"},{"product_id":"copy-of-301a-western-electric-engraved-base-1930s-single","title":"355A Cetron NOS original box 1972","description":"\u003cp\u003e1 tube) 355A Cetron NOS original box 1972 perfect condition, tests very good\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e(355A is similar to 354A except max. plate voltage is 1500V for 354A versus 350V for 355A)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":606284861,"sku":"355acet","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/355acet.jpg?v=1571438796"},{"product_id":"314a-we-v1","title":"(!!!) 314A Western Electric Engraved base NOS 1930's (full-wave rectifier) (56\/40 and 63\/40)","description":"\u003cp\u003e1 tube) 314A Western Electric Engraved base NOS 1930's in white box, mesh-getter\u003c\/p\u003e\n\u003cp\u003e56\/40\u003c\/p\u003e\n\u003cp\u003e63\/40\u003c\/p\u003e\n\u003cp\u003eTested on TV-7D\/U\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e \u003c\/p\u003e\n\u003cp\u003e(314A=similar to Type 83, but much lower PIV rating of 300 volts)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":606290805,"sku":"314A","price":199.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_68df7516-6a82-4d80-8a62-9ae6097651c3.jpg?v=1635278003"},{"product_id":"gz32-miniwatt-dario-france-nos-1955-v12","title":"(!!!) (BEST SINGLE #3) GZ32 Miniwatt Dario France NOS 1955 partially faded printing (62\/40 and 62\/40) small rattle inside base","description":"\u003cp\u003e\u003cstrong\u003eGZ32 Miniwatt Dario France NOS 1955 small rattle inside base from dried glue particles, \u003c\/strong\u003e\u003cstrong\u003eupside down platter shape getter, in white box, partially faded green printing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003e62\/40 \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e62\/40\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003e- Cary SLA-70A\/B amp \u003cbr\u003e- Quad II\u003cbr\u003e- Matchless\u003cbr\u003e- Woo WA6\u003c\/p\u003e\n\u003cp\u003e- Fi X\u003cbr\u003e- Dr. Z Z-28\u003cbr\u003e- Goodsell Super 17\u003cbr\u003e- Transporter modded by Modwright\u003cbr\u003e- Peter Millett headphone amp using 307A's\u003cbr\u003e- Fender Champ 1973\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"GZ32 Miniwatt Dario France NOS 1955","offer_id":608045805,"sku":"gz32dario1","price":88.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_fe44ba8d-0de4-41d1-80fa-24480a493c1b.jpg?v=1590333208"},{"product_id":"copy-of-jan-cw-705a-we-nos-original-box-1944-single","title":"(Best Single) JAN-CW-705A WE NOS original box 1944","description":"\u003cp\u003e1 tube) JAN-CW-705A WE NOS original box 1944\u003c\/p\u003e\n\u003cp\u003eHalf-Wave Rectifier\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"705A WE","offer_id":610473853,"sku":"705awe","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/705awe44_a2d4af52-e597-466d-a9b2-6ce4e980cc97.jpg?v=1571438798"},{"product_id":"5y3g-ge","title":"5Y3G GE used\/good 1943 (46\/40 and 52\/40)","description":"\u003cp\u003e5Y3G GE used\/good 1943 (46\/40 and 52\/40) in WB\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":610489329,"sku":"5Y3G","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_8791daa7-12c2-455e-9d8c-c091f77474cf.jpg?v=1752099690"},{"product_id":"6106-bendix-rebranded-5y3wgta-heintz-kaufman-nos-pair-9","title":"(!!) (Read Review) 6106 Bendix 1950's rebranded 5Y3WGTA Heintz \u0026 Kaufman NOS (64-66\/40 x 2 tubes)","description":"\u003cp\u003e1 pair) 6106 Bendix NOS 1950's rebranded \"5Y3WGTA Heintz and Kaufman\" in H \u0026amp; K boxes 1970's double \"D\" getter halos\u003c\/p\u003e\n\u003cp\u003e1 tube) 64\/40 and 66\/40\u003c\/p\u003e\n\u003cp\u003e1 tube) 64\/40 and 66\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e6106 is a indirectly heated (slow warmup) sub for a 5Y3GT\u003c\/p\u003e\n\u003cp\u003e5Y3GT has a directly heated filament\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6106 pair","offer_id":612934569,"sku":"6106pair","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_17c76ecd-cb23-4a83-9116-167e0eb770e6.jpg?v=1652744297"},{"product_id":"gz33-mullard-nos-1969-single-1","title":"GZ33 Mullard NOS \"D\" getter halo 1959 (sold out)","description":"\u003cp\u003eGZ33 Mullard NOS \"D\" getter halo 1959 internal plates slightly tilted see picture - a few scratches on the base\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e56\/40\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e56\/40\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003etube plugged into octal socket in picture\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n  \n\u003cp\u003e- Woo Audio WA-6\u003cbr\u003e- Lady Day amp\u003cbr\u003e- Allnic H1500 S\/E 11\u003cbr\u003e- Vacuum Tube Audio M-125 (Bob Latino)\u003cbr\u003e- Bob Latino ST-120\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"GZ33 Mullard NOS 1959","offer_id":661504773,"sku":"gz33mull","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_a9374743-9a55-4927-9c7d-49758b525d38.jpg?v=1571438807"},{"product_id":"6x4-ge-beckman","title":"6X4 GE Beckman like new \"D\" getter 1962 (54\/40 and 52\/40)","description":"\u003cp\u003e6X4 GE Beckman like new \"D\" getter 1962 (54\/40 and 52\/40)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003eAudio Note DAC 1.2\u003cbr\u003eLAMM LP2 phono\u003c\/p\u003e\n\u003cp\u003eKONDO KSL M7 preamp\u003cbr\u003eKondo M77 preamp\u003cbr\u003eEastern Electric Minimax Phono\u003c\/p\u003e\n\u003cp\u003ePultec EQ\u003c\/p\u003e\n\u003cp\u003eWright WPP200C\u003cbr\u003eAudio Note M7\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6X4 GE like new","offer_id":668037225,"sku":"6X4ge","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_852c5b05-a11e-4321-ae59-0dbb4cb33d34.jpg?v=1740406475"},{"product_id":"jan-cw-705a-we-nos-original-box-1944-single","title":"(!) (Best Single) JAN-CW-705A WE NOS 1940's","description":"\u003cp\u003e1 tube) JAN-CW-705A WE NOS 1940's in white box\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003ehalf-wave rectifier\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":689187117,"sku":"705Awe","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/705a1.jpg?v=1571438815"},{"product_id":"gz30-5z4gt-mullard-uk-v1","title":"(!!!) 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U19 GEC UK NOS 1960's (1 pair)","description":"\u003cp\u003e1 pair) CV187=U19 GEC UK NOS 1960's - reboxed\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe U19 is a half wave high voltage vacuum rectifier. The U19 was designed to have an effective series resistance of 600 Ohms and to feed a reservoir capacitor of not more than 4 µF. \u003cbr\u003e\u003cbr\u003eThis exhibit, made by M-OV, is branded GEC which was the brand for professional sales.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e(Vfil=4.0 @ 3.3A, Vplate max=2500V @ 250ma)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"U19 GEC pair","offer_id":704573825,"sku":"U19pair","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/U19_large_d8058081-ad63-489b-b509-b4d6eb79bba8.jpg?v=1571438817"},{"product_id":"5u4gb-channel-master-japan-1960","title":"5U4GB Channel Master Japan 1960 double \"D\" getter halos low hours\/tests like new (65\/40 and 68\/40)","description":"\u003cp\u003e5U4GB Channel Master Japan 1960 double \"D\" getter halos low hours\/tests like new \u003c\/p\u003e\n\u003cp\u003e65\/40\u003c\/p\u003e\n\u003cp\u003e68\/40\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003etube plugged into octal socket in photo\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003e- SET amps\u003cbr\u003e- Wright Sound SET\u003cbr\u003e- Audio Note P4 Balanced mono amps\u003cbr\u003e- Dared MCP7 preamp with phono\u003cbr\u003e- Singlepower\u003cbr\u003e- Modwright Transporter\u003cbr\u003e- Donald North Audio\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":707661913,"sku":"5U4GB","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_5fc1a69c-cfb8-43d6-b387-e39094703d01.jpg?v=1604000734"},{"product_id":"5u4gb-usedv1","title":"5U4GB Sylvania used\/tests like new 1960's (54\/40 and 54\/40)","description":"\u003cp\u003e5U4GB Sylvania used\/tests like new 1960's\u003c\/p\u003e\n\u003cp\u003e54\/40\u003c\/p\u003e\n\u003cp\u003e54\/40\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTest results on TV-7D\/U\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003e- SET amps\u003cbr\u003e- Wright Sound SET\u003cbr\u003e- Audio Note P4 Balanced mono amps\u003cbr\u003e- Dared MCP7 preamp with phono\u003cbr\u003e- Singlepower\u003cbr\u003e- Modwright Transporter\u003cbr\u003e- Donald North Audio\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":707665337,"sku":"5U4GB","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_1135f033-25d9-4b30-9b7d-0dc0eed1fd68.jpg?v=1746128376"},{"product_id":"copy-of-ux-281-rca-radiotron-balloon-used-like-new-engraved-base-1930s","title":"81 ST-19 RCA Radiotron engraved base 1939, tests like new, loose glue particles inside base (good value) (53\/40)","description":"1 tube $15) 81 ST-19 RCA Radiotron engraved base 1939, tests like new, loose glue particles inside base (good value) (53\/40)","brand":"Tube World","offers":[{"title":"Default Title","offer_id":708483045,"sku":"81","price":15.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/81eng.jpg?v=1571438819"},{"product_id":"81-st-19-rca-radiotron-nos-red-printing-in-original-box-54-40-recommended-single","title":"81 ST-19 RCA\/Radiotron NOS RED PRINTING in original box (54\/40)","description":"1 tube) 81 ST-19 RCA\/Radiotron NOS RED PRINTING in original box (54\/40)","brand":"Tube World Express","offers":[{"title":"Default Title","offer_id":708484657,"sku":"81","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/81rcast19.jpg?v=1571438819"},{"product_id":"81-st-19-purotron-made-by-rca-engraved-base-nos-in-white-box-single","title":"(!) (#1 81 ST-19 glass shape) 81 ST-19 Purotron made by RCA \"engraved base\" NOS in Sparton box 1940's (56\/40) (strong output)","description":"1 tube) 81 ST-19 Purotron made by RCA \"engraved base\" NOS in Sparton box 1940's (56\/40)","brand":"Tube World","offers":[{"title":"Default Title","offer_id":708490433,"sku":"81puro","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/81puro.jpg?v=1571438819"},{"product_id":"81-st-19-harvey-burnam-nos-engraved-base-in-original-box-single","title":"81 ST-19 Harvey Burnam by RCA NOS engraved base 1940's (54\/40)","description":"1 tube) 81 ST-19 Harvey Burnam by RCA NOS engraved base 1940's (54\/40)","brand":"Tube World","offers":[{"title":"Default Title","offer_id":708491165,"sku":"81harvey","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/81harv.jpg?v=1571438819"},{"product_id":"866ax-amperex","title":"866AX Amperex France brown base 1965 tests like new, a few scratches on base, reboxed","description":"\u003cp\u003e1 tube) 866AX Amperex France brown base 1965 tests like new, a few scratches on base, reboxed\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eNOT A PAIR\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":708520397,"sku":"866ax","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/866ax.jpg?v=1571438819"},{"product_id":"5y3g-krv2","title":"5Y3G Ken Rad used\/good 1940's faded printing (46\/40 and 51\/40)","description":"\u003cp\u003e5Y3G Ken Rad used\/good 1940's faded printing (46\/40 and 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SET\u003cbr\u003e- Audio Note P4 Balanced mono amps\u003cbr\u003e- Dared MCP7 preamp with phono\u003cbr\u003e- Singlepower\u003cbr\u003e- Modwright Transporter\u003cbr\u003e- Donald North Audio\u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e\r\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"5U4GB","offer_id":726991409,"sku":"5U4GBrca","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/5u4gbbald.jpg?v=1571438822"},{"product_id":"5u4gb-westinghouse-low-hours-like-new-d-getter-large-getter-some-vertical-scratches-on-base-1963-single","title":"5U4GB Westinghouse low hours\/like new \"D\" getter, large getter, some vertical scratches on base 1963 (54\/40 and 56\/40)","description":"\u003cp\u003e1 tube) 5U4GB Westinghouse low hours\/like new \"D\" getter, large getter, some vertical scratches on base in original box 1963\u003c\/p\u003e\n\u003cp\u003e54\/40 \u003c\/p\u003e\n\u003cp\u003e56\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"5U4GB","offer_id":727024009,"sku":"5u4gb","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/5u4gbwest2.jpg?v=1571438822"},{"product_id":"5u4g-crosley-sylvania-used-good-1950","title":"5U4G Crosley Sylvania used\/good 1950 (55\/40 and 56\/40) stains at top from usage","description":"\u003cp\u003e5U4G Crosley Sylvania used\/good 1950 stains at top from usage\u003c\/p\u003e\n\u003cp\u003e55\/40\u003c\/p\u003e\n\u003cp\u003e56\/40\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":727175185,"sku":"5U4G","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/products\/1_e77fa750-16d5-4794-afd9-33fba4f807b5.jpg?v=1629300608"},{"product_id":"5u4g-sv3","title":"5U4G Sylvania used\/good 1948 small getter (54\/40 and 55\/40)","description":"\u003cp\u003e5U4G Sylvania used\/good 1948 small getter (54\/40 and 55\/40)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":727182941,"sku":"5U4G","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_b9f62f28-b9e7-474a-a827-48dfd1204b43.jpg?v=1761149756"},{"product_id":"5y3gt-syl-v2","title":"5Y3GT Sylvania used\/good 1955 (46\/40 and 51\/40)","description":"\u003cp\u003e5Y3GT Sylvania used\/good 1955 (46\/40 and 51\/40)\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":755872597,"sku":"5Y3GT","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_bae4c11e-b777-4f39-82cb-1e333314c425.jpg?v=1732520444"},{"product_id":"6087-5y3wgtb-ge-5-star-nos-single-1","title":"(!!!) (Best Single) 6087=5Y3WGTB GE 5 Star NOS 1968 (52\/40 and 52\/40)","description":"\u003cp\u003e6087=5Y3WGTB GE 5 Star NOS 1968 (JY) \"D\" getter\u003c\/p\u003e\n\u003cp\u003e52\/40\u003c\/p\u003e\n\u003cp\u003e52\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e- 6087 = ruggedized 5Y3GT\u003c\/p\u003e\n\u003cp\u003e- indirectly heated\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e- Fender Tremolux 5E9-A 1954 (Tungsol and RCA)\u003cbr\u003e- Fender Champ 5F1\u003cbr\u003e- Fender 5E3\u003cbr\u003e- Fender Vibro Champ 1966\u003cbr\u003e- Supro 1624 (Led Zeppelin I)\u003cbr\u003e- Decware ZP3 phono\u003cbr\u003e- Decware CSP2 Preamp\u003cbr\u003e- Melody 300B mono amps\u003cbr\u003e- Dared SL-2000a\u003cbr\u003e- Victoria\u003cbr\u003e- Fender EC Vibro CHamp 2012\u003cbr\u003e- Heathkit AR-2 1954\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":755878465,"sku":"6087ge","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/1_7f6ccbab-d8f9-4212-8fdc-6023a21c3460.jpg?v=1725822052"},{"product_id":"6x4-nuv1","title":"6X4 National Union used\/good 1951 (55\/40 and 56\/40)","description":"\u003cp\u003e6X4 National Union used\/good 1951 (55\/40 and 56\/40)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eRecommended for\u003c\/h1\u003e\n\u003cp\u003eAudio Note DAC 1.2\u003cbr\u003eLAMM LP2 phono\u003c\/p\u003e\n\u003cp\u003eKONDO KSL M7 preamp\u003cbr\u003eKondo M77 preamp\u003cbr\u003eEastern Electric Minimax Phono\u003c\/p\u003e\n\u003cp\u003ePultec EQ\u003c\/p\u003e\n\u003cp\u003eWright WPP200C\u003cbr\u003eAudio Note M7\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tube World","offers":[{"title":"6X4","offer_id":760411413,"sku":"6x4w","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/3_1_fa8edaed-b90b-44f4-8a1e-250765bc7cd5.jpg?v=1770159381"},{"product_id":"5as4a-westinghouse-d-getter-halo-1960-1965","title":"5AS4A Westinghouse \"D\" getter halo 1960-1965 (58\/40 and 58\/50)","description":"\u003cp\u003e5AS4A Westinghouse \"D\" getter halo 1960-1965\u003c\/p\u003e\n\u003cp\u003e58\/40\u003c\/p\u003e\n\u003cp\u003e58\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e5AS4 \/ 5AS4A Full-Wave Rectifier\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e(Higher Max DC output current and peak current per plate than 5AR4,\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ebut 5AS4 is directly heated, recommended as an upgrade for a 5U4GB)\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e- Sun Audio SV300B-MKII\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Meixing Ming Da mc-7r 2006 pre\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e- Audio Note Mono amps\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSONIC COMMENTS:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e5AS4, as you described, seemed to open up the soundstage and improved the headroom, more macro-dynamic, just seemed to be stronger and more forceful. 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