[ICOM] Help with Severe Electrical Noise

[Pete ....]

Michael,

Make sure that you disconnect the charger on your
battery first. Only the radio connected to the
terminals. Still noisy?

If that does not help, scope your incoming mains,
there should be two of them, to make your 230VAC.

No noise there? Do the same with all branch circuits,
you will find the bugger and the device causing your
problem.

Good luck, Peter, NH6VB


--- michael morgan <cmorgan13 at gmail.com> wrote:

> I am sorry this is not directly related to Icom
> radios except the usage of
> them.  I have an Icom 756Pro II that I am using with
> a Gap Challanger
> antenna.  Also has been well for the last few years.
>  For some reason about
> three days ago and started getting a s9 or higher
> "White Noise" on all
> bands.  It is over powering all but the strongest of
> signals.  The is
> happening on all bands.  I have tracked it down to
> something electrical
> around my desk.  I did this by the following means.
> If I power the radio
> from a 12V marine battery and kill the breaker to 
> my Shack area the noise
> diminishes.  If I power the breaker back on the
> noise returns.  I tried to
> unplug everything with the breaker on and I get the
> noise.  I am stumped.
> It is there if I power from a battery or my 12V
> power supply.  I
> disconnected everything from the rig exept power and
> antenna and it is
> there.  Any help would be greatly appreciated.  Also
> this is occuring on my
> other rigs as well which are a Icom 706MKIIG and a
> Kenwood ts450s.
> 
> 
> Thanks in advance
> 
> Michael, AA5SH
> ----
> Your Moderator: Dick Flanagan K7VC:
> icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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> 



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