High Current only on 20 Meters

[Leroy Buller]

The more I think about it....I do kinda agree.  Something did get hot cause
it smelled like burning plastic.  No response yet from [hidden email]

Lee

Lee

On Wed, Mar 4, 2020, 4:30 PM Mark Musick <[hidden email]> wrote:

> Hi Lee,
>
> If the ATU is bypassed, it should have no effect.
> I'm betting on a LPF issue.
>
> 73,
> Mark, WB9CIF
>
> -----Original Message-----
> From: [hidden email] <[hidden email]>
> On Behalf Of Leroy Buller
> Sent: Wednesday, March 4, 2020 21:24
> To: Bob McGraw K4TAX <[hidden email]>
> Cc: Elecraft Reflector <[hidden email]>
> Subject: Re: [Elecraft] High Current only on 20 Meters
>
> Bob,
>
> Yes I think you are right but I think the amps Hp and Lp are ok because it
> just happens on 20 mtrs.  I think there is something bad in the LPF or
> ATU.  I betting on the ATU.  But not for sure.  Emailed support Lee
>
> On Wed, Mar 4, 2020, 2:11 PM Bob McGraw K4TAX <[hidden email]> wrote:
>
> > I would run a TX gain calibration using the K3 Utility and a 50 ohm dummy
> > load.   Then with an external power meter and dummy load, observe the
> power
> > output on each band.   Be sure the ATU is bypassed for this measurement.
> >  This would isolate the issue to the PA, ATU or low pass filter which
> > is band dependent.
> >
> > Bob, K4TAX
> >
> >
> > Sent from my iPhone
> >
> > > On Mar 4, 2020, at 12:46 PM, Leroy Buller <[hidden email]>
> wrote:
> > >
> > > I have a K3 that seems to have a problem.  I am getting HI CURRENT
> > warning
> > > only on 20 meters.  The antenna is matched.  80, 40 and 15 do not
> > > have
> > the
> > > issue.  The current meter on the power supply does show quite a bit
> > > of current (20+ amps) on 20 meters but when I reduce power it stops
> > > giving
> > me
> > > the issue on 20 meters.  When I reduce power on 20 meters, the high
> > current
> > > goes away around 65 watts.
> > >
> > > Anyone have an idea what is going on?  I do appreciated the help
> > >
> > > Lee - K0WA
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> >
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