Hi Guys
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Thank you for the data.
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The two replies are close enough to provide sensible guidance.
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I am going to use a repurposed lipo tool battery. Ie 21 V fresh off the charger and 18.5 V for most of the discharge cycle.
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I will use a couple of diodes in series between 21V and 20V to burn off the excess.
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I will set the bias for 20 V.?
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BR
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Chris
