I have two Eimac tubes that are in sealed cans. I believe they are military tubes and the closest I can come to a tube type is the words TYPE JAN 7203. There are lots of other numbers on the label which also says
ELECTRON TUBE ONE EACH. I know there is a type 7203 power amplifier tube, but the other numbers are confusing to me. I suspect they may be part of the contract information. Can anyone help me identify these tubes. I can't even see them without breaking the seal on the cans. Any help will be appreciated.

Hi Dick

Those tubes will be 7203's (4CX250B). JAN means Joint Army Navy.

Norm

:I have two Eimac tubes that are in sealed cans. I believe they are military tubes and the closest I can come to a tube type is the words TYPE JAN 7203. There are lots of other numbers on the label which also says
:ELECTRON TUBE ONE EACH. I know there is a type 7203 power amplifier tube, but the other numbers are confusing to me. I suspect they may be part of the contract information. Can anyone help me identify these tubes. I can't even see them without breaking the seal on the cans. Any help will be appreciated.