(!!) (Recommended Pair) 6C8G RCA NOS 1940's same build (3.5/3.5ma and 3.9/3.9ma)
By Tube World
$ 39.99
1 pair) 6C8G RCA round black plates NOS 1940's
1 tube) 3.9/3.9ma and Gm=1600/1600 RCA 1947 - top cap cleaned - smaller getter
1 tube) 3.5/3.5ma and Gm=1500/1500 Emerson by RCA 1940's - larger getter
Tested in Amplitrex
Vplate = 250V
Vgrid = -4.6V
Good NOS Ma = 3ma
Good NOS Gm 1500-1600
dual-triode
You an buy an adapter socket on EBAY to sub this tube for a 6SL7GT
See more: vacuum tube
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 (Recommended Pair) 6C8G RCA NOS 1940's same build (3.5/3.5ma and 3.9/3.9ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_63255728-9cd9-4d70-8188-327a9389a3dd.jpg?v=1642879113){kind=link}
 (Recommended Pair) 6C8G RCA NOS 1940's same build (3.5/3.5ma and 3.9/3.9ma) "Pin It")