The meter should be isolated from the diodes by a couple of 100 ohm
resistors to each terminal. A little more meter protection.
Don W4DNR
Quoting Mitch Cox <ww4cox@embarqmail.com>:
> BTW, those diodes need to be much larger than 1N4004's.
> ----- Original Message -----
> From: Paul Decker
> To: amps@contesting.com
> Sent: Friday, May 27, 2011 9:42 PM
> Subject: [Amps] Meter issue
>
>
>
>
>
>
> I've been trouble shooting a problem in my amp with the Ip and Ig
> metering. I've got parallel 1n4004 diodes with opposite polarity
> accross the meter terminals of each Ip and the Ig meter, nothing
> new, pretty standard.
>
>
>
> It's easy enough to replace the diodes, but what would cause one
> of the diodes in both meters to fail in the shorted case? There are
> no other apparent problems and the amp still works save seeing the
> meters deflect.
>
>
>
> Thanks
>
> Paul
>
>
>
>
>
>
>
>
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