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How do you test a Selenium Rectifier?
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Phil Hobbs[_2_]
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How do you test a Selenium Rectifier?
On 12/2/18 2:26 AM, Fox's Mercantile wrote:
On 12/2/18 12:30 AM,
wrote:
How do you test a Selenium Rectifier?
Yes, I am aware that they should be replaced, but on preliminary tests
of this 1956 Zenith tube AM-FM Radio, I want to know if it's working. My
digital multimeter shows 1meg in one direction, 2.5 meg the other way.
NOT DISCONNECTED FROM THE CIRCUIT. To me, that seems bad, but I have not
worked with one of these in many years, and never had to replace one in
the old days. My meter was climbing, probably from the filter caps.
during this test.
A DMM won't read correctly. No enough voltage compliance on the current
source to read ohms correctly.
Just replace it with a 1N4007 diode and about 100 ohms series resistor.
And watch out for confetti.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.net
http://hobbs-eo.com
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