I have 22 bands integrated into my 5000A and am just getting around to
working high power on the lower bands.
Have 1500 watts from 160m - 70cm and good power beyond that in frequency.
I worked the PA QSO party this weekend and although I had a little rf in
my audio system (another issue that will be addressed) I had some
significant issues when running cw.
On SSB things seemed to be ok, but on CW I got some funny things
happening on occasion with the mode window in PowerSDR. It seemed like
it would momentarily switch into SSB mode. But that was so quick, I
couldn't tell for sure.
More disturbing was reports of sounding like having ac hum on the line.
I had reports of need to check my power supply. I'm sure it's not the
power supply as I am on a battery isolated by a Power gate product for
keeping the battery charged.
I have the usual rf choke installed on the Firewire line as well as an
additional ferrite core around that cable.
All devices are grounded well to a heavy ground that circles the house.
Using an ACOM 2000a amplifier.
The amplifier is located approx 20 feet away from the Flex near the
antenna switching frame where antennas are switched.
I added a DX Engineering Ferrite isolation choke to the input of the
amplifier but it did not make a difference.
I'm thinking next steps would be to start adding ferrite and coils to
the coax feeding the amplifier to keep rf from coming back toward the Flex.
I am looking for other folks experience and suggestions for next steps
in being able to run full power on CW. Like I said, SSB seems to work fine.
Thanks for input.
73,
Phil K3TUF
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