On 3/10/2019 10:33 PM, Peter Dougherty wrote:
I have a 30 foot vertical ground-plane style antenna that I use for diversity
RX on 40 and 80, which was connected to the AUX antenna port. This was being
overloaded by the QRO power from the TX antenna feedpoints just a few feet
laterally and 40-50' higher vertically. As soon as I disconnected this antenna
the problem went away.
Hi Peter,
It sounds to me like your station (and maybe your home) is not properly
bonded. All of your feedlines SHOULD be bonded to a common ground at
lightning arrestors where they enter your shack, all the equipment in
your shack SHOULD be bonded together and to all of the grounds in your
home including that one, power, telco, CATV, and satellite. If you've
done this, disconnecting one of the antennas from your rig should not
change anything on the transmit side -- the only change should be
overload of the second RX by that antenna.
Two good references on grounding and bonding. One is N0AX's recent ARRL
book on the topic. The second is the set of slides for talks I've done
at Pacificon and Visalia on the topic.
http://k9yc.com/GroundingAndAudio.pdf
73, Jim K9YC
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