(!!!) (Recommended Pair) 56 National Union rebranded Western Electronics NOS 1940's (4.9ma and 5.1ma)
$24.99
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1 pair) 56 National Union rebranded Western Electronics NOS 1940's "D" getters 1 tube) 4.9ma Gm=1400 1 tube) 5.1ma Gm=1400 Matched on Amplitrex Vplate=250V Vgrid=-13.5V Good Ma range = 4.5 - 5ma Good Gm range = 1300-1400 (76=Type 56 with a 6.3V Filament and also is similar to type 37) UX-5 pin socket - Tube Audio Lab FF preamp- Korneff preamp
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