Western Electric 300a and 300b

Delay,

Would you consider 422a a soft start? Thanks for the response 

Larri 

I can't believe it! I'm into collecting tubes and looking at signals. I haven't listened to these. But yes, I think I will sell them 

Any connections?

Cheers 

Contact Deja Vu Audio in Virginia.  They buy these kind of tubes for use in reconditioned/rebuilt Western Electric amps. 

Not familiar with 422A, but it is described as being indirectly heated (as is the 5ar4).

DeKay

The only difference between the 300A and 300B is the locating pin, which is not used by any modern amp. I believe the 300A was only made by Western Electric for one or two years, then replaced by the 300B.

I would check the provenance of any tube claiming Western Electric heritage very carefully. WE never made that many, and very few were sold to the public. (WE didn’t sell equipment, they leased it to theater owners.) No amplifier maker in the Fifties, Sixties, or Seventies manufactured amplifiers using 300B’s.

Modern reproductions look very close to historic 300 series tubes. Be cautious.