That's always worked for me, Mike! The bit of resistance that I suggested
that Jim add ahead of the FET gate and the diodes serves the same purpose as
your incandescent lamp - but I expect that the lamp is more rugged and
forgiving.
73,
Charlie, K4OTV
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Mike
Waters
Sent: Sunday, August 25, 2013 4:15 PM
To: James Rodenkirch; topband
Subject: Re: Topband: Two 2:1 transformers to choose from!!
Ever since I added back-to-back 1N4148's between the preamp's input and
ground many years ago, I have never lost a transistor in my preamp. Before
that, it seemed that I was replacing it after nearly every thunderstorm.
A couple of years ago I changed it a little: I added a small incandescent
lamp in series with the preamp input. At the same I changed from just two
to four of the same diodes in series/parallel.
There are other ways as good or better than this, but this works for me.
73, Mike
www.w0btu.com
On Sun, Aug 25, 2013 at 10:13 AM, James Rodenkirch
<rodenkirch_llc@msn.com>wrote:
> Any ideas on a front end protection circuit for a preampl?
>
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