> Thanks, Steve. However the zeners used by amp mfgs reportedly have a
> high failure rate and none of them have adjustable Vz. A string of fwd
> biased Si diodes does the job for this application.
>
> //I don't doubt that at all. I've used strings of rectifiers myself, and
> even with a 6-position rotary switch to select taps between the diodes, to
> adjust the bias for variations in tubes, etc. Cheap, simple, effective.
> If the zeners used by amp mfrs have a high failure rate, they probably
> purchased crappy zeners or made a poor selection for the application -- or
> maybe both.... WB2WIK/6
>
> >
>
> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> www.vcnet.com/measures.
> end
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