Read the information in the links from Jim Brown. Once you understand what
he is explaining, it becomes easier to fix.
http://audiosystemsgroup.com/RFI-Ham.pdf
http://audiosystemsgroup.com/NCDXACoaxChokesPPT.pdf
~73
Don
KD8NNU
2014 3905CC Top Gun :-)
-.- -.. ---.. -. -. ..-
-----Original Message-----
From: Paul Kiesel via Topband
Sent: Friday, February 17, 2017 2:40 PM
To: [email protected]
Subject: Topband: Common Mode RF Currents Disrupting JT Transmissions
Hello -
I'm not able to run more than 150 watts when using JT65 on 160. RF gets into
the computer and disrupts the JT signal. I don't have this problem on 6m
where I run QRO using JT65 on EME. I installed ferrite beads on all radio
and computer leads, with multiple beads on coax cables. My antenna is an
inverted-L hanging from a big douglas fir, and it's about 150 feet from the
shack. The feed coax is RG-218 (same as RG-17), so there was no opportunity
to coil it into a choke at both ends. Should I be more aggressive with the
ferrites?
Respond directly, please. Thanks.
73, Paul K7CW
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