On Oct 4, 2004, at 7:33 AM, Bill Turner wrote:
On Mon, 4 Oct 2004 01:58:50 -0000, Barry Kirkwood wrote:
Beats me why people buy high watts zeners to set the bias of
amplifiers when
there is a better and cheaper way.
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High power zeners are nearly bulletproof when it comes to brief
overloads, power surges, spikes, arcs, etc, etc. Your low power
transistor-and-zener approach seems a bit risky by comparison. And if
you use a really high power, high voltage transistor, what have you
saved? Power zeners are pretty cheap anymore.
- A string of 3A Si rectifiers is cheap and they are adjustable in
0.7v steps by moving the tap. However, a power zener is not
adjustable. A 3A rectifier will withstand 200a peaks. Can a power
zener handle 200A?
KISS is Murphy's worst enemy. :-)
Those who ignore Murphy are their own worst enemies. Cheerz, Bill.
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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