From gswynar at durham.net  Thu Nov  1 15:48:37 2007
From: gswynar at durham.net (EP Swynar)
Date: Thu Nov  1 14:56:46 2007
Subject: [HBR] Meter Repair...?
Message-ID: <001201c81cc8$97d980f0$4121334a@SwynarComputer>

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
From wrcromwell at gmail.com  Fri Nov  2 07:21:45 2007
From: wrcromwell at gmail.com (Bill Cromwell)
Date: Fri Nov  2 07:29:23 2007
Subject: [HBR] Re: HBR Digest, Vol 45, Issue 1
In-Reply-To: <20071102090058.98C86859D55@mailman.qth.net>
References: <20071102090058.98C86859D55@mailman.qth.net>
Message-ID: <234313270711020521m53ec1036i8f1243a864e058e9@mail.gmail.com>

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

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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@durham.net>
> Subject: [HBR] Meter Repair...?
> To: <antiquewirelessassociation@egroups.com>, <hbr@mailman.qth.net>,
> 	"Welcome to the Novice Rigs List!" <novice-rigs@mailman.qth.net>,
> 	<boatanchors@mailman.qth.net>, <drakelist@zerobeat.net>,
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> Message-ID: <001201c81cc8$97d980f0$4121334a@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
>
> ------------------------------
>
> _______________________________________________
> HBR mailing list
> HBR@mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/hbr
>
>
> End of HBR Digest, Vol 45, Issue 1
> **********************************
>
From gswynar at durham.net  Fri Nov  2 11:11:55 2007
From: gswynar at durham.net (EP Swynar)
Date: Fri Nov  2 10:22:17 2007
Subject: [HBR] Re: Meter Repair...? --- GOOD NEWS!
Message-ID: <000201c81d6b$492ea900$0921334a@SwynarComputer>

Good Morning All,

Well, I'm VERY pleased to report that, in the process of getting access for the removal of my B+ voltage monitoring meter from the front of my amplifier, the doggone thing has returned to normal again...!

I undid umpteen screws, knobs, spacers, protective screens, ad nauseam to get the thing removed ---  somehow during all of this electronic compontentry feat of gymnastics, whatever it was that whacked-out the meter movement yesterday & prevented it from dropping back down to zero, became "re-set". 

Chalk one up to "...industrial phenomenon."

I couldn't really tap the meter before, when it was securely in place, to free anything up that might have temorarily "...snafu'ed" inside, because of the bulk of the amplifier surrounding it....looks like the bump & grind of its removal worked wonders for it, though, and me...

I laughed at myself when I held a perfectly normal meter staring me in the face at the end of it all, because I thought right away of one of the Apollo moon landing missions, when an astronaut's camera on the lunar surface refused to work...what did he do to fix it so far away from home? He tapped the thing!

I believe history records that it worked fine after that.

Many thanks to all for the sage & knowledgable advice that was imparted to me these past coupla days --- there is a real watershed of smart people out there who really know their stuff in such matters, and I salute you...!

Should those folks who offered to look for a direct replacement for this meter in their respective junque boxes still care to do so, I'll be only too pleased to consumate the deal --- after all, spares are always a good thing...

Thanks again, & my vy

~73!~ Eddy VE3CUI - VE3XZ


*****************************************

  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
From johnmb at nc.rr.com  Fri Nov  2 15:33:53 2007
From: johnmb at nc.rr.com (john)
Date: Fri Nov  2 15:40:45 2007
Subject: [HBR] Re: [AWA] Re: Meter Repair...? --- GOOD NEWS!
In-Reply-To: <000201c81d6b$492ea900$0921334a@SwynarComputer>
References: <000201c81d6b$492ea900$0921334a@SwynarComputer>
Message-ID: <6.2.1.2.2.20071102163308.040379f0@pop-server.nc.rr.com>

At 12:11 PM 11/2/2007, EP Swynar wrote:
>Good Morning All,
>
>
>Should those folks who offered to look for a direct replacement for this 
>meter in their respective junque boxes still care to do so, I'll be only 
>too pleased to consumate the deal --- after all, spares are always a good 
>thing...


Ed,

Even though the posession of a spare will ensure that the meter will NEVER 
fail again, it's cheap insurance!

John k5mo 

