Pat:
I've tried coiling up part of the cord, and inserting an RF choke, and that
did reduce the RFI somewhat, but not completely.
I like your idea of an additional extension cable, but haven't quite figured
out how to do that yet.
Am awaiting additional thoughts from Bob Heil himself.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "Pat Byrne" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 10, 2011 9:40 PM
Subject: Re: KB8TYJ 20-meter RFI problem solved, I think finally!
Maybe as simple as rolling up part of the cord. Or perhaps adding a
short extension might break up the resonance. Easier than cutting
and re-attaching the plug.
Pat, K9JAUAt 07:35 AM 3/10/2011, you wrote:
>Hi, all.
>
>I think I have finally gotten to the bottom of my RFI problem on 20 meters
>when using the Alpha Delta DXCC antenna.
>
>Now, all I have to do is figure out how to fix it, and how to replace what
>little hair I still have that has been pulled out in the process.
>
>My problem is with the cable for my Heil Gold Line mic! Thanks to Kevin
>(K7RX) for giving me the clue.
>
>I used headphones to monitor my transmit audio, first with the stock mic
>that came with the TS480. Crystal clear audio on both 100 watts, and 600
>watts using the amp. Then, switched back to the Heil. Crystal clear audio
>on 100 watts, but terribly distorted audio using 600 watts and the amp.
>Tried putting an RF choke around the Heil mic cable, which reduced the
>RF-generated audio distortion considerably but not completely.
>
>Just for grins, I tried the Heil set-up on 40 meters with both low and high
>power, and had crystal clear audio both times.
>
>So, obviously, that mic cable is doing something to me on 20 meters.
>
>Will write to the folks at Heil for their suggestions, and would appreciate
>any thoughts any of you have as well.
>
>I'm relieved, but now have to figure out what to do to correct the
>situation, if I'm going to use my Heil gold line mic on 20 meters with the
>Alpha Delta DXCC.
>
>73 from Tom Behler: KB8TYJ
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