(!!) (Best Single) 12BY7A Tungsol NOS 1960 era (29.5ma)

12BY7A Tungsol NOS 1960 era O getter

29.5ma

Gm=12,300

Tested on Amplitrex AT1000

Vplate=250V

Vscreen=180V

Iplate Ma (good) = 26ma

Gm = 11,000

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

12BV7 is close substitute