K2 High Current

[Mike Short]

My K2 S/N 5163 goes in to current limit at about 7 watts or so on 40M. I set
the limit to 3.5A, so something is not right. The voltage drops about 1V
from 13.5 to 12.5 as well using the K2 meter. I have a 25 amp PS, and
increase the wire size with no real change. The other bands go in to limit
as well at about the same output level. The PA bias resistance check was
low. It reads about 800 ohms, and should be 2.5-3.0K (Page 71). The rest of
the band adjustments went well, and it receives great.
Any ideas?
 
 
Mike
AI4NS
 
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[Don Wilhelm-3]

Mike,

The most probable cause of Hi Cur is the low pass filter - check the number
of turns on toroids L25 and L26, check the capacitor values in the 40 meter
low pass filter and check the soldering, particularly the toroid leads.

73,
Don W3FPR

> -----Original Message-----
>
> My K2 S/N 5163 goes in to current limit at about 7 watts or so on
> 40M. I set
> the limit to 3.5A, so something is not right. The voltage drops about 1V
> from 13.5 to 12.5 as well using the K2 meter. I have a 25 amp PS, and
> increase the wire size with no real change. The other bands go in to limit
> as well at about the same output level. The PA bias resistance check was
> low. It reads about 800 ohms, and should be 2.5-3.0K (Page 71).
> The rest of
> the band adjustments went well, and it receives great.
> Any ideas?
>
>
> Mike
> AI4NS
>
>

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[Ken Alexander-2]

Hi folks,

Silly as it may sound I'm trying to key my KX1 using a
microHAM CW Keyer (uses Winkey), controlled by my
notebook, which will be running N1MM Logger.  I want
to try this setup in the Ontario QSO Party tomorrow.

I have the microHAM USB device router and N1MM Logger
both configured so they're not looking for a
transceiver.

The USB device router software lets you send a test
message in CW to confirm that Winkey is working, which
it is.  However, when I plug the keyer cable into the
KX1 and try the test message the KX1 transmits a solid
carrier that won't quit until I unplug the cable.  If
I plug it back in the KX1 will wait patiently for the
next input.  

The keyer sends TEST once as it should then stops, as
indicated by its sidetone and front panel LEDs.  

The KX1 is configured to Hnd for hand key or external
keyer.

I'm stumped.  Any thoughts from those of you who stump
less easily would be most welcome!

73,

Ken Alexander
VE3HLS
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[Don Wilhelm-3]

Ken,

What happens if you plug a hand key into the KX1? or paddles with the KX1
set to Hand?  If it keys properly, then your problem is in the cable or in
the microHam Keyer.

I guess there is also the possibility that you are getting RF feedback which
locks the combination into transmit - try testing into a dummy if you are
not already (either bypass the internal tuner or TUNE it to the dummy load
first).

73,
Don w3FPR

> -----Original Message-----
>
> Silly as it may sound I'm trying to key my KX1 using a
> microHAM CW Keyer (uses Winkey), controlled by my
> notebook, which will be running N1MM Logger.  I want
> to try this setup in the Ontario QSO Party tomorrow.
>
> I have the microHAM USB device router and N1MM Logger
> both configured so they're not looking for a
> transceiver.
>
> The USB device router software lets you send a test
> message in CW to confirm that Winkey is working, which
> it is.  However, when I plug the keyer cable into the
> KX1 and try the test message the KX1 transmits a solid
> carrier that won't quit until I unplug the cable.  If
> I plug it back in the KX1 will wait patiently for the
> next input.
>
> The keyer sends TEST once as it should then stops, as
> indicated by its sidetone and front panel LEDs.
>
> The KX1 is configured to Hnd for hand key or external
> keyer.
>
> I'm stumped.  Any thoughts from those of you who stump
> less easily would be most welcome!
>
>

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