(!!!!) (Best Pair) 6F6G Marconi Spain NOS 1940's (37.3ma and 37.5ma)
$ 119.99
1 matched pair) 6F6G Marconi Spain NOS 1940's
1 tube) 37.3ma Gm=2600 shorter bottle
1 tube) 37.5ma Gm=2700
TUBES PLUGGED INTO OCTAL SOCKETS IN PHOTO
Test settings:
Vplate=285V
Vscreen=285V
Vgrid=-20V
Good Ma range = 32-38ma
Good Gm range = 2400-2600
Recommended for
- Sparton Nocturne 1186 from 1936
- Fire Stone Sir Chef S-7404-3 1939
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- Supratek Cortese
- Victoria
- WE 106 preamp clone
- Wards Airline Radio
See more: vacuum tube
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 (Best Pair) 6F6G Marconi Spain NOS 1940's (37.3ma and 37.5ma) "Pin It")