HM 102 Wattmeter mods and service

[Mark Graalman WB8JKR]

 BTW, the high power calibrate pot is a 100K ohm and it
replaces R-9 the 82K resistor.

73,  Mark  WB8JKR


On Wed, 3 Oct 2001 16:01:56 -0400 WB8JKR at juno.com writes:
>   If you plan on using it with an amplifier I would
> replace that swr null trimmer with a 10 pf piston
> style trimmer. I usually also install a pot in
> place of the fixed resistor so that the 2000
> watt scale can be calibrated separately.
>
> 73,  Mark  WB8JKR
>
>
>
> On Wed, 3 Oct 2001 11:29:41 -0500 "john w. king"
> <jbkking at BELLSOUTH.NET> writes:
> > Hello all: I have several HM 102 wattmeters that I plan to put
> with
> > my
> > various vintage boatanchor stations etc. and would like to know if
>
> > there are
> > any GOOD mods or service tips that make an improvement in the
> "old"
> > HM102s.
> > Please give me the benefit of your suggestions and experience.
> >
> > I find a variance between the POWER readings from meter to meter.
> > What do
> > you suggest?? Thanks and 73, John, K5PGW
> >
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