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Date:	Tue, 20 Aug 2019 21:49:41 +0000 (UTC)
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Here's something I used with functional results.  I have not looked at it with
a spectrum analyzer for generated noise yet...  But scope probing near it doesn't seem bad.

https://www.cibolo.com/docs/pyflex_f401_power_18V.png

The white X's are inputs to shut it down and to adjust output to two different levels.
You can lose those parts.

If it seems valuable for your goal, I have pcb-rnd layout and lepton-schematics for it and some
parts I can mail you.

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