{"product_id":"recommended-pair-56-national-union-rebranded-western-electronics-nos-1940s-p1a","title":"(!!!) (Best Pair) 56 National Union rebranded Western Electronics NOS 1940's (6.5ma and 6.9ma) (Highest mA and Gm)","description":"\u003cp\u003e1 pair) 56 National Union rebranded Western Electronics NOS 1940's\u003c\/p\u003e\n\u003cp\u003e1 tube) 6.5ma Gm=1500 taller glass - on left\u003c\/p\u003e\n\u003cp\u003e1 tube) 6.9ma Gm=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=-13.5V\u003c\/p\u003e\n\u003cp\u003eGood Ma range = 4.5 - 5ma\u003c\/p\u003e\n\u003cp\u003eGood Gm range = 1300-1400\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e(76=Type 56 with a 6.3V Filament and also is similar to type 37)\u003c\/p\u003e\n\u003cp\u003eUX-5 pin socket\u003cbr\u003e \u003cbr\u003e\u003cbr\u003e- Tube Audio Lab FF preamp\u003cbr\u003e- Korneff preamp\u003c\/p\u003e","brand":"Tube World","offers":[{"title":"Default Title","offer_id":36222740693156,"sku":"56pair","price":38.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0333\/7633\/files\/4_40ec1db3-2f74-4478-ba8a-4ea1c3ef32d9.jpg?v=1778938836","url":"https:\/\/tubeworldexpress.com\/products\/recommended-pair-56-national-union-rebranded-western-electronics-nos-1940s-p1a","provider":"Tube World Express","version":"1.0","type":"link"}