[RodB]

There's an interesting circuit that's been around for awhile. It's a solid state field coil or filter choke. It's really a simple regulator that will handle up to 100ma, probably a little more if heat sinks are used. If you google "solid state filter choke" the link to Antique Wireless Association will be the one. I looked at using the LR8 several years ago for a 90 volt supply for farm radios but it only supplies 10ma when most farm radios need 30-50ma. Thisl one would handle it nicely and it's adjustable.

Anyone use this in the past?