"Owen Duffy" wrote in message
...
"Ralph Mowery" wrote in
m:
..

Something to keep in mind is that the average power of uncomressed voice
SSB is about 3% of PEP, so if your 1kW was uncompressed voice SSB, the
average transmitter power might be more like 30W, or half that in a 50:50
over scenario over the long term.

Another thing is the ferrite toroids heat and cool very slowly, so the
operating temperature might still be rising half an hour after the
transmitter is applied (so long as you haven't exceeded their Curie
temperature).

It would not surprise me if the common mode choke consumes a significant
portion of transmitter power on some bands, the portion will depend a lot
on your own scenario.

Owen

I was running the amp around 1 KW with a carrier so the power was a constant
KW.
I only felt the choke while testing on 80 meters. It got warm, but not hot
after about 5 minuits of applied power while hooked to the antenna. Never
got even warm just going into the dummy load.

While I don't know what the choke actually does to the outgoing signal, my
reasoning was to try and keep the unradiated power from comming back in the
the shack and causing problems.