[Amps] Commander plate voltage readings ?

[Joe Giacobello]

Thanks for raising the issue.  I have a 1200 and it's reading low HV 
also and, in addition, the plate current meter is not registering at 
all.  I suspected the resistors were the issue in both cases.  Now 
you've confirmed it.  I have yet to open it up since 6M has been so good 
lately.

73, Joe
K2XX

John Lemay wrote:
> Hugh
>
> I think you are entirely correct. When I bought a Commander amplifier a few
> years ago, the first thing I had to do was to replace that chain of
> resistors. Good luck !
>
> John G4ZTR
>
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of hduff at cogeco.ca
> Sent: 16 July 2007 19:49
> To: amps at contesting.com
> Subject: [Amps] Commander plate voltage readings ?
>
> Is there a known issue with low plate voltage readings on Commander
> amplifiers ?
> A friend of mine owns a VHF-1200 and a VHF-2000.  Both read quite low on the
> front panel plate voltage meter. i.e. 1900v
> on the meter while an HV probe shows it to be more like 2600v.
> It would appear the voltage divider resistors changed through
> age/overheating stress. Seems like a bit of a job to
> change them out since they're buried in the internally accessible input
> compartment.
>
> 73 de Hugh VA3TO
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