[Elecraft] Resistance Checks During Front Panel Assembly
Ron D'Eau Claire
rondec at easystreet.com
Thu Jul 13 22:38:03 EDT 2006
WATCH OUT, WATCH OUT! Do NOT dig out that old analog meter unless you KNOW
it's designed for modern solid state gear. Making a single measurement with
it can fry more I.C.s, diodes and transistors than you may care to count!
Older meters put way too much voltage on the circuit and allowed way to much
current to pass for modern devices.
Open circuit is > 50 K, or whatever so your find with any such readings.
Ron AC7AC
-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Michael Cook
Sent: Thursday, July 13, 2006 7:24 PM
To: elecraft at mailman.qth.net
Subject: RE: [Elecraft] Resistance Checks During Front Panel Assembly
> OL may also mean "out of range". Take the auto ranging off your
> DMM. OL
> may just mean resistance is higher than current range allows, or
> something.
>
> Vin Cortina KR2F
I just tried that, as well as my other DMM, and the same thing is
still happening. For what it's worth, I think the guts of my second
meter (sold by Radio Shack) are actually made by the same company as
my first meter (Metex Instruments).
I tried both auto ranging (as I keep the meter on) and the highest
range (dual digit mega-ohm, so it could show 37.5 M for example).
I have installed the parts on the board that you install for the
KSB2, for what it's worth. I don't think that would change anything,
but there you go.
There is a tiny chance I have an old analog meter somewhere, I'll
hunt for it tomorrow. _______________________________________________
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