[CQ-Contest] amps in series

[David O Hachadorian]

I have a spare amp, and this evening I had the bright
idea to configure the amps so they could be tuned to
different frequencies, and easily switched in and out
for changing bands rapidly.

I daisy-chained two amps, with the rf output of one
connected to the rf input of the other.

The two relay control lines are connected to a spdt
switch, so both amp relays can never be on at once.

By using this one DC spdt switch, the need for two
spdt rf switches is eliminated. The only slightly weak
link is the short piece of RG-58, inside the second amp,
that goes from the rf input connector to the relay. It
now carries 1500W when amp number one is in use, but no
problem so far.

I suppose I could line up six SB-220's this way, with a sp6t
switch and have an el cheapo Alpha 87a.

Maybe someone has tried this and reported on it already,
but I had never heard of it, and it seems to work fb.

Dave Hachadorian, K6LL
Yuma, AZ
K6LL at juno.com


--
CQ-Contest on WWW: http://lists.contesting.com/_cq-contest/
Administrative requests: cq-contest-REQUEST at contesting.com