[TenTec] Antenna Analyzers

[David McClafferty]

I'm not saying it was easy to fix. What I meant was I
didn't see any circuitry in there that would be worth
making a big deal about keeping it secret.
It took me a long time to fix it. I gave up a couple
of times. I drew out the diagram of the oscillator
circuit so I could troubleshoot it but finally gave in
and just replaced all the FET's. I found they had to
be exact replacements, substitutes didn't work.
As far as being clever and lucky, I think patience and
stubborn persistence had more to do with it. Plus over
40 years of electronics troubleshooting experience.
BTW the counter/display section was a separate unit
with a protection diode so it was undamaged.

Dave, VE1ADH

 --- Bill Fuqua <wlfuqu00 at uky.edu> wrote: > I am happy
you are so clever or just lucky.
> 
> 
> At 10:01 AM 8/14/2003 -0400, you wrote:
> >I don't know what the big deal is, just an
> oscillator
> >and SWR meter. I repaired one that had been damaged
> by
> >reverse polarity by just replacing all the
> >semiconductors. One chip and a half-dozen FET's as
> I
> >recall.
> >
> >73, Dave VE1ADH
> >
> >  --- "Bill L. Fuqua" <wlfuqu00 at uky.edu> wrote: >
> MFJ
> >considers the workings of their antenna
> > > analyzers a top secret. It is one theing that
> they
> > > don't provide even if you aske for it or are
> willing
> > > to pay.
> > >
> > > 73
> > > Bill wa4lav
> > >
> > >
> > > -----Original Message-----
> > > From: Wa9mxq at cs.com
> > > To: tentec at contesting.com
> > > Date: Wed, 13 Aug 2003 20:50:59 EDT
> > > Subject: Re: [TenTec] Antenna Analyzers
> > >
> > > I have always gotten schematics. But maybe this
> > > isn't the case on every
> > > product. On the ones I have gotten, the
> schematic
> > > has been included.
> > >
> > > 73,
> > >
> > > - Bill, WA9MXQ
> > >
> > >
> > > In a message dated 8/13/2003 7:48:58 PM Central
> > > Daylight Time,
> > > wa2bpe at infoblvd.net writes:
> > > > why doesn't MFJ provide schematics with
> > > > equipment?
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> > >
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> > >
> > >
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