[Heathkit] The Case of the Phantom Voltage

Robert Nickels ranickel at comcast.net
Fri Feb 8 16:59:28 EST 2019


Fixing problems in old radios is a good exercise in deductive reasoning, 
even if sometimes the clues don't lead in an expected direction.   That 
was the case when I ran into a phantom voltage in an HW-12 recently - a 
voltage that couldn't be there according to the schematic - yet there it 
was!    Go here to get the whole story:

http://tinyurl.com/ycbngl4a

I think this is a very unique situation but since the same type of PC 
boards were used in many other Heathkits and other radios, I thought it 
would be worth passing along, just in case someone else comes up against 
a similar mystery.

73, Bob W9RAN



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