[Amps] bias for 3cx3000

[R.Measures]

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.
>
> _________________________________________________________
>
> 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