(!!!!) (Recommended Pair) 6F6G Marconi Spain NOS 1940's (37.5ma and 39ma)
$ 129.99
1 matched pair) 6F6G Marconi Spain NOS 1940's
1 tube) 37.5ma Gm=2850 slight rattle inside base - slightly taller bottle
1 tube) 39.0ma Gm=2770
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
- Montgomery-Ward Airline Model 62-226
- Supratek Cortese
- Victoria
- WE 106 preamp clone
- Wards Airline Radio
See more: vacuum tube
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 (Recommended Pair) 6F6G Marconi Spain NOS 1940's (37.5ma and 39ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/1_81cb2b61-b82d-4f10-9291-f4984bc3bb1b.jpg?v=1675313330){kind=link}
 (Recommended Pair) 6F6G Marconi Spain NOS 1940's (37.5ma and 39ma) "Pin It")