True as a general issue, but in practice all depends by which diodes
and what's the peak duration/current involved. Evidently, 1N4005 are
not enough compliant with the general assumption if compared with a
larger power zener in the specific application.
But, at least, 1N4005 were fast enough to protect fuses.
73,
Mauri I4JMY
> ---------- Initial message -----------
>
> From : owner-amps@contesting.com
> To : "i4jmy@iol.it" <i4jmy@iol.it>, "AMPS" <amps@contesting.com>
> Cc :
> Date : Thu, 31 Aug 2000 03:54:57 -0700
> Subject : Re: [AMPS] Problem with SB-220 Bias Diodes
>
>
>
> >
> >The forward polarized diodes used are probably unsuited for this
> >application or with some short term abnormal condition (i.e. lousy
> >antenna connector, bad soldering somewere, parasitics, etc.)
> >Change diodes with larger devices or better use the original Zener
> >connecting it to the ends of the diodes stripe (enough to remove one
> >from the chain), finally the zener it's an upgrade.
> >
> 10w zener diodes typically short when exposed to high surge
currents. 3A
> diodes can handle 200a-peaks. ....
>
> - Rich..., 805.386.3734, www.vcnet.com/measures.
> end
>
>
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