[Elecraft] K2 and the KPA100 Power Fluctuation - Another Follow up

Sun Jun 15 11:08:01 2003

Ah, but I am just finishing the K2 and haven't started the KPA100 yet, so
don't know if I need it.  I was wondering if it made sense to do the mod to
the K2 before I finish it, or wait and see.

73,
Tom, W6WW
K2 #3453

----- Original Message -----
From: "Harry Yingst" <[email protected]>
To: "Tom, W6WW" <[email protected]>
Sent: Sunday, June 15, 2003 1:29 AM
Subject: Re: [Elecraft] K2 and the KPA100 Power Fluctuation - Another Follow
up

> If your unit needs it then I would go ahead and do it
>
>
> --- "Tom, W6WW" <[email protected]> wrote:
> > Is this an unofficially recommended mod?  I am still building the
> > basic K2,
> > but have the KPA100 waiting.
> >
> > 73,
> > Tom, W6WW
> > K2 #3453
> >
> >
> > ----- Original Message -----
> > From: "Harry Yingst" <[email protected]>
> > To: "Michael Harris" <[email protected]>;
> > "Elecraft_Reflector"
> > <[email protected]>
> > Sent: Saturday, June 14, 2003 9:07 PM
> > Subject: Re: [Elecraft] K2 and the KPA100 Power Fluctuation - Another
> > Follow
> > up
> >
> >
> > > I almost did that but then deceided to do it the hard way :)
> > >
> > >
> > > --- Michael Harris <[email protected]> wrote:
> > > > G'day,
> > > >
> > > > Another one bites the dust.....  Niggle, that is.
> > > >
> > > > Based on comments read I took the simple route and just removed
> > the
> > > > bottom
> > > > cover extracted R98, trimmed the leads of a 1kohm resistor,
> > dropped
> > > > it in
> > > > place and soldered from the same side.
> > > >
> > > > Confirmed that I could still hit 10W on 10 metres.  Fired up the
> > > > KPA100 and
> > > > bingo, rock steady power.  A good 15 minutes work by any measure.
> > > >
> > > > Anyone without the KPA100 wouldn't understand the hassle factor
> > 'cos
> > > > it
> > > > isn't particularly noticeable with the basic K2.
> > > >
> > > > Regards,
> > > >
> > > > Mike VP8NO (IOTA SA-002)
> > > > GQRP 10148
> > > > QRP-Canada #57
> > > > K2/100 #1400
> > > >
> > > > > As per the Tech Note: "Your goal is to find the largest value
> > of
> > > > R98
> > > > > (up to 1 K) that allows for the desired maximum power output on
> > 10
> > > > > meters using TUNE. Try various R98 settings until you find this
> > > > value."
> > > > >
> > > > >
> > > > > The tech note said to use a 1K max pot but I could not achieve
> > > > enough
> > > > > range, My final measurement came out to be 2.18k, I then
> > installed
> > > > a
> > > > > 2.15k (2.2k that measured out to be 2.15k) resistor in it's
> > place.
> > > > >
> > > > >
> > > > > Closed up the case and the Fluctuation is gone.
> > > >
> > > > _______________________________________________
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> > >
> > >
> > > =====
> > > Harry - AB2PN
> > >
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> > >
> > >
> >
> >
>
>
> =====
> Harry - AB2PN
>
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