This reminds me of something else:
Unlike synthesized radios, the Scout uses an LC permeability tuned VFO
(PTO).
The VFO coil is sensitive to magnetic fields. Placing a power supply too
close to the rig can cause FM modulation of the PTO by the power supply
transformer's magnetic field.
That's also a good point regarding grounding the negative side of the
Astron supply. Check the power supply output voltage while transmitting
to see if RF is causing it to fold back. Use a cheap analog meter: some
digital meters will give false readings in an RF field.
73,
Bob WB2VUF
ultrafixedwing@juno.com wrote:
>
> Sometimes just moving the supply to the other side of the rig helps. Try
> anything.
> Paul
> KS2S
>
> On Mon, 22 Oct 2001 20:47:40 -0700 "Ben Kadish K8DIT" <benk8dit@serv.net>
> writes:
> > Hi Again, To address your last question. The proximity/distance
> > between the
> > rig and power supply sometimes will be critical. If r.f. gets to the
> > power
> > supply, that's all it takes to go bonkers. Moving it inches,
> > sometimes just
> > the angle will make a difference. Astrons are pretty well r.f.
> > proofed, but
> > if there is a ground loop, you cant tell what may be at fault, all
> > you can
> > do is vary things and find the sweet spot, or find that loose nut,
> > or lifted
> > trace, or cold solder joint, or bad coupling cap. It could be an IC
> > that is
> > just on the edge of failing, but its probably something a little
> > more
> > dimensional, like a
> > component hanging by a hair, or three. Probe the little bugger,
> > you'll find
> > it. When you solve it, it'll be oh so sweet. Walk away from it for a
> > day,
> > then charge back in. When you least expect it, the fault will show
> > up like a
> > hair in the porridge. good luck.
> >
> >
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> > TenTec@contesting.com
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>
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