Western Electric 308B tubes

[toxcrusadr]

http://www.westernelectric.com/static/library/specifications/tubes/308B.pdf

This thing is monstrous!
14" long x 3" wide
14V 6A filament
Typical plate voltage for audio amp, 1000-1500V

If these are NOS they should have very little to zero markings on the pins indicating they were not put into sockets.

 

[Lazarus Long]

http://www.westernelectric.com/static/library/specifications/tubes/308B.pdf

This thing is monstrous!
14" long x 3" wide
14V 6A filament
Typical plate voltage for audio amp, 1000-1500V

If these are NOS they should have very little to zero markings on the pins indicating they were not put into sockets.

 

[kcline]

Can not be tested in normal testers can only be tested in high power rig

 

[Tre']

https://static1.squarespace.com/static/5f0983034219c6086e8100ac/t/5f4551a9cf1fdb6c9dac3137/1598378413016/308B.pdf