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37 US Brands NOS (6 in stock)

37 US Brands NOS (6 in stock)

$ 14.99

37 US Brands NOS:

1) 37 RCA Cunningham engraved base NOS in white box 1930's (8.8ma)

1) 37 Sylvania branded RCA Victor NOS 1940's (7.1ma)

1) 37 GE NOS silver printing (7.3ma)

1) 37 GE NOS orange printing 1943 (7.1ma)

1) 37 Ken Rad NOS 1940's (8.2ma) (pictured)

1) 37 Tungsol engraved base NOS original box 1930's (7.4ma)

 

MAKE TUBE SELECTION AT CHECKOUT

(Tested on Amplitrex AT1000) (Good range 6.5-8ma)

 

Test parameters:

Vplate=250V

Vgrid=-18V

Iplate good range 6.5-8ma

Gm=1100

(Filament=6.3V @ 300ma, many think the 37 sounds better than the 76)

See more: vacuum tube
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