Bob,
This is one of the more common symptoms of common mode RF
on the various control lines - particularly if you are using
"COMM PTT" (or serial commands for PTT).
See the various online referenced by W1HIS and K9YC about
common mode chokes and RFI.
73,
... Joe, W4TV
> -----Original Message-----
> From: writelog-bounces@contesting.com
> [mailto:writelog-bounces@contesting.com] On Behalf Of Bob
> Jensen - aa7fk
> Sent: Sunday, January 06, 2008 10:02 PM
> To: writelog@contesting.com
> Subject: Re: [WriteLog] Xmit problem on 80 mtrs
>
>
>
> Al K0AD and Mark WA9IVH,
>
> THANKS for your prompt replies .. and I think you solved my
> problem. When I read your responses then tried the module
> into a dummy load .. no problem, the xmit unkeyed as it
> should. So something must be amiss at the antenna. And of
> course it is very wet here :-).
>
> Thank you so much for your insight, don't know why I didn't
> consider RF .. but you know blind spots show up :-).
>
> Hope to catch ya both on the air soon.
>
> 73 & HNY
>
> Bob AA7FK> From: Aldewey@aol.com> Date: Sun, 6 Jan 2008
> 21:19:01 -0500> To: writelog@contesting.com> Subject: Re:
> [WriteLog] Xmit problem on 80 mtrs> > > In a message dated
> 1/6/2008 8:14:16 P.M. Central Standard Time, >
> aa7fk@hotmail.com writes:> > After the contest I checkout
> other modules with 80 mtrs and all exhibited > the same
> problem.> Set up here is Icom 756PRO3, WL with MMTTY plug-in
> (which by the way when I > just use the stand alone MMTTY
> program the 80 mtr problem does NOT present > itself, only
> within WL) and the interface is RigBlasster Plus.> > Any
> ideas to chase down? Anyone experience that problem now or in
> the past?> > Appreciate your help.> > Thanks.> > Bob AA7FK> >
> > > Bob;> > Are you absolutely sure this is not RF? I had the
> exact same problem on 20 > meters when I pointed my beam in a
> specific direction. When I turned off the > amp, or turned
> the beam in another direction, the problem went away. Might >
> you have RF on 80 that you don't have on the other bands?> >
> 73,> > Al, K0AD> > > >
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