HM-2102 Wattmeter Question

[mike bryce]

richard...

I've come across this problem. The fix is cleaning the contacts in the
swr/sen pot switch in the cabinet. That's what I had to do in two different
units. When the switch is cleaned, you can get the null from C4. it seems
that goop in the switch causes the meter to read sen and forward power at
the same time. Try it and see if that is your problem too.

--
Mike Bryce WB8VGE
SunLight Energy Systems
"Electricity at the speed of light"

> From: "'Richard Prescott' 'KE4VM'" <KE4VM at CS.COM>
> Reply-To: KE4VM at CS.COM
> Date: Sat, 10 Jun 2000 10:11:59 EDT
> To: HEATH at LISTSERV.TEMPE.GOV
> Subject: HM-2102 Wattmeter Question
>
> Hello Greenies,
> I have a VHF SWR/Wattmeter that does not want to act just right when I follow
> the SWR Balance Adjustment procedure on page 14 of the manual.  The manual
> states that you "adjust SWR NULL trimmer C4 on the circuit board for the best
> null or dip of the meter needle. This should be at or near zero."  I use a
> plastic alignment tool and the meter dips nowhere near zero, in fact I go all
> the way with the pot and never reach a dip. Has anybody ran into this problem?
>
> Actually, I have one meter that works fine and TWO have exactly the problem
> stated above.
>
> Thanks for any help,
> Richard Prescott
> KE4VM
>