No problems with rf in my shack with the Orion II and
the audio lines, etc. Antennas are right above me and
power levels from 50 to 1500w. I find my Orion II
rather RF proof at my installation.
Maybe some grounding would help?
73,
Ken, KA0W
--- Ken Brown <ken.d.brown@hawaiiantel.net> wrote:
> The ferrite is keeping RF picked up by to headphone
> cable from getting
> into the electronics and causing the thump, right?
> So then is the Orion
> not designed to work around strong EM fields,
> without having to add
> attachments to your headphone cable?
>
> I have had RF intrusion into various rigs, cause
> troubles. Every time it
> was due to a poorly made cable connected to an input
> (usually
> microphone) never to a headphone output jack. So I
> know that even the
> best rigs may be susceptible to strong RF in the
> shack. On the headphone
> jack though? From just the pickup on the headphone
> cable? Tell me it is
> not true, and the guys with this problem are either
> doing something
> really wrong, or have defective rigs. This is
> Ten-Tec premier rig, right?
>
> DE N6KB
>
>
>
> Ron Castro wrote:
> > The thumping in the headphones on 15 meters is not
> an uncommon problem. Try
> > it on 10, and it will probably be more pronounced,
> and even more so if you
> > run power. You need to wrap the end of your
> headphone cable around a
> > ferrite loop like the FT-240 43 or 77 mix. That
> fixed the problem for me
> > and for a few others here on the list.
> >
> > Ron Castro
> > Chief Technical Officer
> > Results Radio, LLC
> >
> >
> >
> >
>
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> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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