12BY7A Motorola by Sylvania NOS 1960's (21ma)

12BY7A Motorola by Sylvania NOS 1960's

21ma

Gm=10,300

Tested on Amplitrex AT1000

Good Ma range 25-30ma

data book specs:

Gm=13ma/V for 12BY7A

Gm=12ma/V for 12BV7

Power=6.5 watts max

Heathkit DX-35 1950's
Kenwood TS-830S Transceiver
Kenwood 520
Kenwood TS-20
Yaesu FT-101 Transceiver

12BV7 is close substitute