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Old 31st Oct 2017, 3:52 pm   #10
julie_m
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Join Date: May 2008
Location: Derby, UK.
Posts: 7,735
Default Re: Thought this might amuse you...

It must have been a fast-recovery diode fed from a high-frequency power supply. The common 1N4007 type rectifier diodes tend to lose their rectifying ability at a few hundred Hz, so would not have substituted well in this application.
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