D'Arsonval meter repair

[Larry Gauthier]

If I recall correctly, the meter movements and covers for the SB220 were the
same as those in the HM102 and HM2102 SWR/wattmeters [but obviously not the
meter scale]. If you need to repair an SB220 meter, you can purchase a
used/salvaged SWR meter and pillage it for its meter.

-larry
K8UT
a former ham from Heath
----- Original Message -----
From: "Kevin J Ward" <kevin_ward at JUNO.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Thursday, April 25, 2002 3:06 PM
Subject: D'Arsonval meter repair


> First of all, before you go to the trouble of trying to fix the meter,
> make sure the needle is not stuck.  Hold the meter in your hand with the
> front facing you and give it a quarter turn twist and back.  See if the
> needle swings easily.  If it does, check the continuity of the movement.
>
>
> This is tricky and MUST be done carefully.  You need a DVM with a LOW
> POWER OHMS scale.  DO NOT use a Simpson 260 or some such; you can easily
> ruin a good movement.  If the meter is open, look for a replacement
> meter.
>
> If the meter in question is a readily available type, and the meter
> scales are what make it unique, you can scavenge a working meter and
> switch the scales.  It's a tricky operation, but a lot easier than
> repairing the movement itself.  You almost have to be a jeweler to do
> that.  Just make sure that the basic movement rating is the same; i.e.,
> 0-1 ma F.S. or whatever the old meter is.
>
> Kevin
> N2IE
>
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