HM 102 Wattmeter mods and service

[Mark Graalman WB8JKR]

  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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