[Amps] Autek WM-1 calibrated...

[Alek Petkovic]

I've had a few of those before I got the LP-100A's and you are right. RF 
does get into them.
Very simple fix though. Just wrap half a dozen turns of the power lead 
around an inch or so of 3/8" ferrite rod or through a ferrite clamp on.
Never had another moment's trouble with mine, after I did that.

73, Alek. VK6APK

On 4/03/2013 1:19 PM, KG8YN wrote:
> I have one too.  They do pick up stray RF.  I haven't fixed mine, but I would bypass and use a shielded cable to the remote pickup, put a back plate on the unit and ground it, add a metal power jack to your plate with a pi-net RF filter in series with boards dc input.
>
> That should nullify or greatly reduce the effect.  1 watt of UHF from my link HT will raise the Autek's needles.
>
> I think it is a basic good design, but they missed the boat on RF proofing.
>
> Jim Lewis
> KG8YN
>
> ----original message---
> Hi all I'm having an issue and I think that it's the wall wort.  The meter
> tested fine at low power on the test bench.....300 watts.  When I put it in
> line on the station with an excellent station ground(ex combat comm) the
> meter reads some 400 watts higher PEP than the Alphas internal LED's read.
> I'm thinking RF is being picked up on the power cord from the wort to the
> meter.
> any other ideas?
> Cam
> WA4JKW
>
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>    

-- 
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