[ARC5] Diode Mystery

[Mike Feher]

Diodes are often used to generate noise from HF to microwaves. However in
your application It would have been negligible. If you were doing it
correctly, I am at a loss to explain what may be the cause. 73 - Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf
Of Robert Eleazer
Sent: Monday, November 30, 2020 10:32 AM
To: arc5 at mailman.qth.net
Subject: [ARC5] Diode Mystery

 

The other day I installed a rectifier diode in the 12VDC B+ line of a radio
for reverse current protection.  When I used my trusty Simpson DVOM to check
proper continuity I was shocked to see that the voltage read something like
30VDC.  At first I thought that the output voltage meter on the bench power
supply I was using was wildly off, but checking it at the output terminals
showed that it was the correct 12V.  But on the other side of the diode it
read about 30VDC.

 

I used a different DVOM and it read the proper voltage on both sides of the
diode.

 

Anyone have any idea what could have happened here?  Is it possible the
diode created some noise that confused the Simpson DVOM?  If so, should I be
concerned about that noise getting into the radio?

 

Thanks!


Wayne

WB5WSV    

 

      

 


 
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