The Eternal Squire wrote:

Hi,

I'm going fast and furious into building things, which is the reason I am
posting
so much. Latest project is a variable power supply.

Situation: Radio Shack wall transformer with 11 VDC unregulated output is
going into an LM371. I want to shunt with a pair of 5.1 V , 1A Zeners in
series
so that my adjustable output voltage is repeatable. Presently my Zener
series resistor is 180 ohms.

Problem.. I'm frying my zeners!!

What should I be doing differently?

What are you shunting with the zeners? Describe the circuit after the
11 volt DC raw supply.

--
John Popelish