Brian,
I know a guy in Sonoma, CA, whose porch lights come on (dimly) when he
transmits on 160!! Fortunately, my main problem (on 20 meters) seems not to
touch the DSL, WiFi, etc. system. Fingers crossed. I think one of the hidden
problems we all have is resonance with phone lines, househol
Hi Jim,
Well, the ferrite bead may not be self-resonant on 20 meters, but it still
provides SOME impedance to the common-mode current. I found experimentally
that it did help. And lots of people use these snap-on beads to good effect
even in situations where multiple turns (which of course wo
On Mon, 25 Jan 2010 09:14:21 -0800, Oliver Johns wrote:
>Try putting a snap-on ferrite bead ON the actual boom of the
>electret headset microphone. Put it right at the end, just before
>the microphone bulb. Maybe the RF is getting into the electret or
>its FET and is being rectified there.
Fe
From: Oliver Johns
Date: 25 January 2010 09:12:00 PST
To: Brian Machesney
Cc: Oliver Johns
Subject: Re: [Elecraft] K3: transmitted RF feedback with condenser mics?
Try putting a snap-on ferrite bead ON the actual boom of the electret headset
microphone. Put it right at the end, just before
On Sun, 24 Jan 2010 14:53:28 -0500, Brian Machesney wrote:
>The problem headset is designed for aviation use and, as far
as
>I can tell, uses a shielded mic cable.
Since I'm an RFI/EMC specialist, I'll offer some ideas for you
to try.
1) Reduce the input gain as much as practical while still
I am getting transmitted RF feedback into the K3 when running high power
with a headset that uses a condenser element. With an otherwise identical
setup, I don't have any problems with either of my two headsets that have
dynamic mic elements, using either the front- or the rear-panel mic jacks.
I
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