I had a similar RF problem with a Heil headset mic. The RF came back at me
through both the speakers and the headphones. Since this was the only RFI I've
ever seen in my shack, I used a good ol' Mix 31 split ferrite and wound the
mic cord through it several times, as was already recommended. Since the
ferrite is heavy, and the mic cable is very puny, I also put the Heil mic
adapter cable through it for both support and additional RF suppression. It
worked fine. Jim KJ2P
> Date: Fri, 13 Apr 2012 08:25:42 -0700
> From: garyw...@gmail.com
> To: FlexRadio@flex-radio.biz
> Subject: [Flexradio] RF in earphones when transmitting
>
> To all,
>
> I would like to download some advice from this knowledgeable group.
>
> I have a Flex 3000 with an ALS 1300 amplifier, and Heil Pro Set Elite
> headphones. Everything works great, except on 40 meters where I get RF
> in my headphones when I transmit at full amplifier power.
>
> I have tried changing the lengths of patch cables in the shack, and also
> upgrading them to a thicker cable, but all to no avail. I seem to be
> getting out just fine, but the loud static in my ears when I am speaking
> is distracting.
>
> Any ideas how to make this problem go away?
>
> Gary
> WG1I
>
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