On Mon, 20 Oct 2003 19:33:02 +0100, Paul Burridge
wrote:

On Mon, 20 Oct 2003 11:20:20 -0400, rob34 wrote:

If you want to keep it to a couple transistors they would be expensive.
You are better off using either more NTE-180 or more mj2955, but I would
cut the voltage down to around 18 volts instead of 24 volts as this
higher voltage leads to more heat for the transistors. Rob

How come no one's yet recommeded that great old PSU war-horse, the
2N3055? Six of them on a decent heat sink and you're sorted!

The main reason I wouldn't use a 2N3055 in that application is the
gain falls of dramatically at high Ic. Design needs to accommodate
this in terms of both driver current capability and loop gain.