[HomeBrew] Looking for tracking regulator circuit.

[Steven Weber]

>I would like to build a bipolar power supply in which the negative voltage 
>tracks the positive voltage and voltage is variable up to say 24VDC at about 
>3 amps. Anyone have a circuit?

Loren,

Look at the current limted, variable supply on my web page.
<http://www.qsl.net/kd1jv> Scroll down the page until you see the link,
near the bottom under power supplies. I've added a simple negative tracking
reg circuit to that page. Though the supply is designed for 0-14 volts
output at 2A, you can addapt it for higher output voltage and current
easialy enough. Relpace the pass transistors with well heat sinked TO-3
types and convert it to a darlington with an additional transistor. 
72,
Steve, KD1JV
"Melt Solder"
White Mountains of New Hampshire
http://www.qsl.net/kd1jv/