[HBR] Re: HBR Digest, Vol 45, Issue 1

[Bill Cromwell]

Hi Eddy,

Have you verified that there are zero volts present when the meter
show 2k? Have you also verified there are 2.5k present when the meter
shows 2.5? I assume you have verified those and that your meter is
probably toast. If there is a zero adjust on your meter it 'might' get
you there. I'm sure you would have already tried that. I recently
disassenbled a meter with a similar problem. The zero adjust had been
damaged and I repaired that. My meter was off by the same amount when
current was applied  as the zero offset...almost 20 per cent.

I'm happy to note that momentary short did not involve you more directly.

73,

Bill  KU8H

On 11/2/07, hbr-request at mailman.qth.net <hbr-request at mailman.qth.net> wrote:
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> Today's Topics:
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>    1. Meter Repair...? (EP Swynar)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 1 Nov 2007 15:48:37 -0500
> From: "EP Swynar" <gswynar at durham.net>
> Subject: [HBR] Meter Repair...?
> To: <antiquewirelessassociation at egroups.com>, <hbr at mailman.qth.net>,
> 	"Welcome to the Novice Rigs List!" <novice-rigs at mailman.qth.net>,
> 	<boatanchors at mailman.qth.net>, <drakelist at zerobeat.net>,
> 	<HEATH at LISTSERV.TEMPE.GOV>
> Message-ID: <001201c81cc8$97d980f0$4121334a at SwynarComputer>
> Content-Type: text/plain;	charset="iso-8859-1"
>
> Good Day All,
>
> I wonder if anyone reading this has ever come up with a possible solution to
> what I have here in the matter of panel meters...?
>
> Specifically, I use an older Simpson brand 0-500 VDC meter to monitor the
> plate voltage of my 2x813 homebrewed linear amplifier (I employ multipliers
> to expand its scale to read 0-5000 VDC): to-day, while doing some
> trouble-shooting on the rig, there was a momentary internal short --- as a
> consequence of this, the meter needle now will NOT return to its "zero" peg,
> but rather, hangs-up at around the 2 KV point on the dial...
>
> 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...?
>
> If it's the latter(!), I need a 2-1/4" x 2-1/4" bakelite Simpson, 0-500 VDC
> unit...please check your junque boxes...!
>
> Thank-you...
>
> ~73~ Eddy VE3CUI - VE3XZ
>
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> End of HBR Digest, Vol 45, Issue 1
> **********************************
>