Here's the one I used to play with:

http://www.geocities.com/technician4/ronw1.jpg

Eisboch


The one in the link (above) is an old AN/FRT-40 used by the Navy primarily
at shore based naval transmitter sites from late 40's. They were phased out
by the mid 70's.

The "40" was a 50kw version of this, an An/FRT-39. It was used both at
shore stations and aboard ship.

The left side rack contained the modulation mode select (CW, FSK, Voice, and
the output mode .... carrier or SSB. It had an "exciter" capable of 1000
watts used to drive the right hand side, 10kw power amp. The exciter could
also be used by itself, hooked to an antenna in emergencies. We used to
have a lot of fun screwing around with that.

http://jproc.ca/rrp/coverdale_gpt10k.gif

A FRT-40 added an additional power output section to raise the output to
50KW

I can't remember anymore. Is it "peak the grid, dip the plate" or the other
way around?


Eisboch