[Hammarlund] Speaking of Tubes

[James A. (Andy) Moorer]

I might remind folks that the FRR-21, 22, 23 (and SRR-11, 12, 13) used 
those &$%##! Raytheon subminiature tubes:
http://www.effectrode.com/signal-tubes/subminiature-tubes/
http://www.navy-radio.com/navy-rcvrs.htm

My cursing is not about the tubes, but is about the fact that they 
soldered them to the PC boards in the modules on those radios. No random 
tube-swapping to find a fault - no tube extender sockets so you can 
probe the signals on the pins. They actually did make a socket for them 
- it looked like a linear 5 (or more)-pin transistor socket.

-- 
James A. (Andy) Moorer
www.jamminpower.com