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Old 17th Mar 2019, 11:48 am   #10
julie_m
Dekatron
 
Join Date: May 2008
Location: Derby, UK.
Posts: 7,735
Default Re: Trio Amplifier KA-2002A mystery component

A little bit, but LEDs used as voltage references are usually forward-biased. (They do actually exhibit constant-voltage behaviour in reverse breakdown, but the PIV is not accurately specified. Good noise sources, though!)
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