[Amps] Use of Manual T/R Switches

[Merv Schweigert]

> There were quite a few 'Electronic T/R switches' available in the late 
> 50's and early 60's, the most 'famous' of which was the B&W T/R switch.

Maybe more famous was the Johnson model..  and it was good for 1 KW 
AM service.  Had some problems with "suckout" that could be cured to 
some extent by the length of coax between the amp and the the switch.
Also used one coupled directly to the amp plate circuit with a very small
high voltage cap.  
For some reason dont miss those so called "good ole" days.  Smell of 
released electrons was not all that pleasant.
Merv K9FD/KH6