I started with 2n3055's. I do not have a scope so I charged a capacitor quickly (no load on SSG) to determine peak voltage. Do this process at your own risk as it can blow parts fast. With 2n3055's, I was getting 165 volts. With MJ15024's, I was getting 225 volts.

In normal operation, with brief load disconnects for whatever reason, the protection NE-2's would glow dull orange with 2n3055. With the MJ15024's, I would get bright pink. With three power coils using MJ15024's, I would get blinding violet.

I used the MJ15024's as the local electronic shop did not have MJ21194's.

I have found all John Bedini's gems worth following.

All my transistors have run cold. There must be negative resistance or some effect taking place.

I plan on using MJ21194's for my next build.

Possibly in a half H bridge with a MJ21193.