[Elecraft] dmm vs vom

[Bill W5WVO]

Oops, I missed "resistance checks". Getting senile. Lyle is
correct, of course. I'd probably want to check the calibration of
the ohmmeter function before using it, especially if the VOM is
fairly old. Just don't try to use the VOM for voltage
measurements.

Bill W5WVO

----- Original Message ----- 
From: "Lyle Johnson" <kk7p at wavecable.com>
To: <elecraft at mailman.qth.net>
Sent: Wednesday, October 08, 2008 12:20 PM
Subject: Re: [Elecraft] dmm vs vom


> > Is there any problem using a VOM instead of a DMM to perform
the
> > resistance checks while building the K3?
>
> As long as the negative side of the internal battery that is
feeding the
> resistance measurement circuit is applied to the ground side of
whatever
> is being measured in the K3 during the check, and the open
circuit
> voltage of the ohmmeter is not more than 3 volts, it should be
safe.
>
> Some VOMs used a 9V battery in the resistance circuit and/or
tied the
> positive side to the "black lead."  At least, some of my old
VOMs did.
>
> 73,
>
> Lyle KK7P
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