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Old 20th Oct 2019, 1:37 pm   #25
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Default Re: DIY battery eliminator for valve radio

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I meant to copy your rotary switch zener ring arrangement, but i think the momentarily open circuit may generate high voltage pike, so I will stick with simple output tappings.
Make before break switches are avaliable and would stop that happening, alternatively an RC on the output would hold it up long enough for the switch to move.