This is the assembled V-Dub pc board with all parts in place. A quick test revealed it was providing 16.7 volts at 8.7 milliamps. There is always some loss because of the series diodes, so the voltage cannot quite reach 18v.
A test of the negative voltage output gave -9.0v when driving an LED with about 5ma. There is no diode drop on the negative output so it gives the full voltage.
I built the voltage doubler and it works great except for one minor annoyance. When I power my BYOC 5 Knob Compressor with this I hear a faint high pitch whine. It goes away when I turn it off but it is annying when on. Is this normal? … if so how can I get rid of it? … can I bump up C6 to 0.1 or 1 uf?
Thanks!
Ken