[Amps] SB220 Meter blown...follow up hope

gudguyham at aol.com gudguyham at aol.com
Sat May 16 16:42:21 EDT 2020

I measure meters with my digital ohm meter at least a few times a week and have been since I had high impedance ohm meters.  Never blew up a meter yet.  Of course you have to know how to do it.

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 On Saturday, May 16, 2020, Jim Thomson <jim.thom at telus.net> wrote:

Date: Fri, 15 May 2020 14:12:57 -0500
From: Paul Kraemer <elespe at lisco.com>
To: amps at contesting.com
Subject: Re: [Amps] SB220 Meter blown...follow up hope

<That will certainly test the meter movement!? It will pin hard once that 
<then you will know it is bad.


<Paul K0UYA

##  Never  had a  problem  so  far..with  my  fluke  87  across meter  movements..and  they  were  0- 1  ma  types,  if  I  remember  correctly.
I  think  this  was  with  87A  manually switched to lower scales. 

##  I  used to  wire  rvs  connected diodes  across  both  plate  and also  grid  meter.
These days  I just  wire the  rvs  diodes..  between  B-  and  chassis.  In  some  cases
2  diodes are used in  series...  4  in  total. 
In  some  cases, a resistor is  wired in series  with  each  rvs  connected  diode...that  was a 
W6WRT  trick..which  works  good.

Jim  VE7RF

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