It has been a very long time since I needed anything other than good old 12 volts from a battery for design. As a matter of fact, the last time I needed higher voltage I got it with a WWII surplus dynamotor for the plate supply of a 6146 on 6 meters ... that gives you an idea of the time frame we are talking about.
However, I've recently been looking at a high power FET design and it would help if I could get 20 to 30 volts for the supply. The chips to do the switching are relatively easy to compare as are the inductors. I'm wondering if anybody has a favorite series of catch diodes that they like to use -- we're talking an amp or two.
Preferably something that is garden variety available on the US side of the pond.
Jim