12BY7A GE Motorola NOS 1973 (21ma)

12BY7A GE Motorola NOS 1973 in white box faded printing

21ma

Gm=10,500

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