On 8/9/2019 8:47 AM, MaverickNH wrote:
While I had quite a few Mix31 beads on antenna coax and the various other
power, CAT and audio cables connecting my rig, it seems adding a few more
helped. I think it was a ferrite bead on the special cable set that connects
the KXPA100 and KX2 that did the trick. RF leaking in somehow!
Mix #31 is useful on the HF bands ONLY if multiple turns are wound
through the core. Only passing the cable through a bead is useful only
on 2M. Study k9yc.com/RFI-Ham.pdf and http://k9yc.com/2018Cookbook.pdf
While my base shack is all bonded to my AC panel ground, I'm running
"portable" with KX2/KPA100 on my deck and portable antennas in my back yard
while we're renovating. So I don't have a good bonding/ground configuration.
Virtually none!
Every chassis in an interconnected system must be bonded together, even
if there is no connection to the earth. How are you powering the
KX2/KPA100? Battery? AC power supply and extension cord?
What is your antenna? Is it some form of end-fed wire, vertical or
random orientation? If so, you need some form of counterpoise to carry
the antenna's return current. If you don't provide one, return current
will flow on the coax to the radio and the other equipment connected to
it, where it can cause mischief. And you need a common mode choke at the
feedpoint (the far end of the coax) as described in the two links above.
73, Jim K9YC
BRET/N4SRN
--
Sent from: http://elecraft.365791.n2.nabble.com/
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