On 5/16/2014 1:25 AM, Jim Brown wrote:
On 5/15/2014 8:21 PM, Stuart Rohre wrote:
>> An easy test for you. If you take an ohmeter from the shield of
>> the mike cable at the base of the mike or where ever you can access
>> it, and then touch the other probe to the chassis of the radio, do
>> you get zero ohms? If your ohm meter has a "Lo Ohms" scale use
>> that one. IF the continuity is there, that should eliminate the
>> "pin 1 question".
>
> NOT TRUE -- depending on the sensitivity of the Low Ohms scale on
> your VOM, it is VERY unlikely that your VOM can tell the difference
> between a connection direct to the chassis and a connection via the
> circuit board to the chassis. My Fluke, carefully calibrated and with
> compensation for the test leads can, but most VOMs cannot.
Yes, I have a Tektronix DMM (IMHO nicer than the Fluke 83 and 87 I've
got -- but that's another story) that has a low ohms scale that
compensates for the test leads. I will try it, but I am not sure if even
the Tek will show what could be a very small difference in resistance.
73,
Carter K8VT
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