[Elecraft] KPA500 & Drake TR7

[Gary Smith]

I hesitate to answer to this, it's been so 
long since I had a TR7 (My 2nd rig) and my 
memory of it is not clear.

Given this disclaimer, I believe you'll 
find an adjustable piece, two wafers with 
a rectangular key hole in the center part 
to turn it. Cap or resistance, I don't 
recall what it was, but it controlled the 
output and you could lower it way down or 
get more than the rated output with it (at 
the expense of the transistors if you 
pushed it too long).

I wish I could remember exactly where it 
was, but I believe it was on the heatsink 
or close to it at the back side of the 
rig. Might have been blue, I'm not sure, 
maybe it was accessible from the outside 
of the radio, from the bottom rear? I 
think I'd remember it if I saw the TR7 
again, the adjustment was in plain sight. 

I suspect if you backed it down you'll be 
fine with the output from the KPA-500.

For some time the TR7 was used for EME, 
the person who bought mine was modding it 
for that and perhaps in an EME group 
someone might have good knowledge of the 
TR7 and where this was exactly located.

73,

Gary
KA1J