[Elecraft] K3: past chirp report

[ab2tc]

Hi,

My remarks to bulleted items below:

1) Sounds good.
2) Where are these voltages measured? If they are measured outside the K3
with an accurate DVM, I would say they are marginal. If so, raise the key up
voltage to 14.2V. If they are measured by the K3S' internal voltmeter they
might be OK.
3) That's way high. My K3S draws no more than 17A at full 100W out. 

I can't really comment on the other bullets. I have heard other reports of
K3 chirps that turn out to be nothing more than hearsay.

AB2TC - Knut

Doug Smith [W7KF] wrote
> Yup, that was me.
> 
> There were some good suggestions made here and I’ve checked them all and
> I’m unable to get the K3S to chirp.  So, at present: unable to replicate..
> 
> Some of the suggested things I’ve checked:
> 
> 1) SWR at the K3S while driving the ACOM 1500 (same operating conditions)
> is 1.05 to 1.  SWR between the ACOM and the antenna at the noted frequency
> is 1.2 to 1.
> 
> 2) Voltage at the K3S is 13.8 key up and 13.2 key down; seems OK.  Power
> supply is a switcher which I’ve used for some years.
> 
> 3) K3S is drawing 21.96 amps key down.  (Not running 100 watts into the
> amp.)
> 
> 4) I’ve intentionally “mis-tuned” the amp just in case that is what was
> going on when the OO noticed the chirp.  I did this by tuning up properly
> at 14.001 and then QSYing to 14.083 and transmitting while monitoring with
> a different receiver.  No chirp, clicks or other anomalies.  This is a
> much worse operating condition than I normally encounter.  It’s so easy to
> tune the ACOM that I keep it properly tweaked.  Also, I was operating in
> CW SS and in the middle of a 2 hour run when the OO heard me chirping and
> I have a tough time imagining that I’d sit on a given frequency for two
> hours without making sure I was properly tuned.
> 
> 5) I do not use ALC between the K3S and the ACOM.  I do run with specific
> power levels on each band (great feature, BTW) such that I’m not able to
> overdrive the amp.
> 
> 6) I’ve checked my in-the-shack coax jumper cables and I don’t see any
> issues.  The antenna end of the coax is currently under 2 feet of snow so
> I haven’t looked at it.  But, I’m getting normal SWR readings here in the
> shack.  There isn’t any arcing going on or the amp would shut down.  No RF
> in the shack; no TVI or other issues in the house.
> 
> 7) I recently made 535 QSO’s in NAQP CW and did quite a bit of listening
> on a second receiver, never heard a chirp.  I wasn’t using the ACOM so I
> ran the K3S at 100 watts.  And, finally, I have not yet received another
> OO report after the NAQP.    ;-)
> 
> I dunno what to think.  The issue remains unresolved but I am unable to
> replicate the problem.
> 
> 73,
> Doug, W7KF
> http://www.w7kf.com <http://www.w7kf.com/>
> 
> 
> 
>> On Jan 19, 2017, at 9:44 AM, Richard Fjeld <

> rpfjeld@

> > wrote:
>> 
>> A few weeks ago, someone had received a chirp report.  Did that ever get 
>> resolved?
>> 
>> Dick, n0ce
>> 
>> --
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