[Elecraft] High Current only on 20 Meters

[Mark Musick]

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: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Leroy Buller
Sent: Wednesday, March 4, 2020 21:24
To: Bob McGraw K4TAX <rmcgraw at blomand.net>
Cc: Elecraft Reflector <elecraft at mailman.qth.net>
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 <rmcgraw at blomand.net> 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 <lee.buller at gmail.com> 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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