[HAM] 2 Questions

[Dave Bishop]

  <. . . .  but all tubes were glass tubes.

Not exactly.  Here are two pictures of the 6J7 tube, for instance, one in a 
metal case and one in a glass tube.  The early Hammonds often used metal 
tubes, and the specs are different between metal and glass versions for some 
tube models.


http://www.radiomuseum.org/tubes/tube_6j7.html
http://www.radiomuseum.org/tubes/tube_6j7g.html

Regards,

Dave Bishop