I also uses a dummy load screwed directly onto the back of the K3 When I
calibrated it
The cable may have been acting like a tuning section
From: Art Nienhouse <[email protected]>
To: [email protected]
Sent: Monday, December 1, 2014 5:14 PM
Subject: [Elecraft] Calibration of my K3
*/I had a issue with my K3 and KPA500 after a couple of years where I would get
error messages over power input /swr and one other fault intermittently the
KPA500 would power hunt slowly building to the final power of 500 w output then
fall back to 200 w or so.
I did the calibration over and over not seeing any improvement I was told to
send in the K3 .
I built it from a kit it preformed as advertized as did the Amp until one day
this started to happen I want to say after an up date but I can't say which one.
What I found that fixed my problem was to *not* use my old Heath Kit Cantanna
dummy load and about 4 foot of coax as the dummy load to calibrate my K3
What fixed the issue
I screwed on the back of my K3 a Lucas Weinchell 50 watt DC-8 GHz dummy load
after using this set up to run the calibration in the K3 Utility problem
solved. Its been a year or so and the K3 is driving the KPA500 just like it is
supposed to do.
Regards
Art
ka9zap
/*
He should also re-do the automated 5- and 50-watt power calibration on all
bands using K3 Utility and a dummy load.
73,
Wayne
N6KR
On Dec 1, 2014, at 1:43 PM, Don Wilhelm<[email protected]> wrote:
> Hugh,
>
> Does he have enough audio drive to illuminate 4 bars solid with the 5th bar
> flashing on the ALC meter?
> If he does not supply sufficient audio to the K3 it will "power hunt" with
> the results you stated.
> The power should be adjusted using the power knob and not by adjusting the
> audio drive.
>
> There is another instance where the K3 will start out at a lower power than
> the requested power, and that is after a bend change or a change in the
> setting of the power knob. The power will start out low, but quickly come up
> to the requested level. But then it will stay correct until another band or
> power level change. IMHO, that behavior is better than spiking the power as
> some other rigs have a tendency to do.
>
> 73,
> Don W3FPR
>
> On 12/1/2014 3:29 PM, SouthCarolinaDolphin wrote:
>> A friend is using my K3 while his is in the shop When he transmit's on the
>> K-3 running a specific power out he notices that the power especially on
>> RTTY will start at a lower output that what was dialed in and gradually
>> raise its output to the maximum dialed in. This seems to be worse on 15 m.
>> It only appears to happen once then will not repeat on same freq. So if a
>> specific power like 100W is dialed in watching his W-2 watt meter the power
>> may start at 60 watts then ramp up to 100 watts usually on RTTY.
>> Any ideas. Thanks
>> Hugh W4DRH
>>
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