[Boatanchors] Meter Repair...?

[Ian]

And...

Before you do anything else, use a magnifier and look carefully in the area
around the pivot and see if there is dirt, dust, metal filings or something
else in there.

More than once I've found many years accumulation of dust or dirt particles
collected in that area.  Make sure you don't poke around there with anything
metal.  I've used tooth picks that I've whittled down and a stuff broom
bristle when some very gentle air applied didn't dislodge stuff stuck in
that area.

Ian, K6SDE

> >>-----Original Message-----
> >>From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
> >>bounces at mailman.qth.net] On Behalf Of w8au at sssnet.com
> >>Sent: Thursday, November 01, 2007 4:25 PM
> >>To: EP Swynar; antiquewirelessassociation at egroups.com;
hbr at mailman.qth.net;
> >>novice-rigs at mailman.qth.net; boatanchors at mailman.qth.net;
drakelist at zerobeat.net;
> >>HEATH at LISTSERV.TEMPE.GOV
> >>Subject: Re: [Boatanchors] Meter Repair...?
> >>
> >>At 03:48 PM 11/1/2007, EP Swynar wrote:
> >>>When I activate the B+ on the power supply, the needle travels right
> >>>back up to 2.5 KV, as it normally does, but again --- with the
> >>>supply off --- the needle refuses to drop down past about 2 KV anymore.
> >>>
> >>>Is there any "fix" for this condition, or is a replacement meter in
order...?
> >>
> >>Since your meter still indicates correctly the front and back
> >>hairsprings on the
> >>D'Arsonval movement may still be intact.  However, there are
counterweights
> >>that look like small springs fitted over horizontal posts of the
armature where
> >>the pointer is attached.  These are adjusted for balance when the
> >>meter is turned
> >>45 degrees either left or right from normal horizontal position.  If
> >>the left counterweight has been "thrown off" by the sudden jolt, it
could
> >>keep the pointer from going all the way back to zero.
> >>
> >>Open up the meter and check this area, while carefully looking for loose
parts
> >>within the case.
> >>
> >>Sometimes a broken hairspring can be re-tacked to it's termination point
by
> >>a little tab of solder.  This is a very tedious process and isn't
> >>always successful.
> >>
> >>Hope this helps..
> >>
> >>73,
> >>Perry  w8au
> >>
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> >>Boatanchors at mailman.qth.net
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> >>** List Administrator - Duane Fischer, W8DBF/W9WZE **
> >>** For Assistance: dfischer at usol.com **
> >>$ For vintage radio info, see the HCI web site $
> >>http://www.w9wze.net

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