I love chirps, it reminds of the real good old days when I was young.
We used to be able to recognize station by their distinct chirp.
I heard one station in the recent FQP with one, the chirp give me a very
warm feeling.
I guess, it does not take much to make an old ham warm and happy.
73, Lou KE1F
On 4/29/2021 00:21, Dana Roode K6NR wrote:
It was reported today by several folks who heard my CW signal that I have a
bad chirp - I was operating on 20 meters during CWT. I listened to the
signal myself (my station is 80 miles away and I can listen on a local
transceiver). Someone also sent me a recording.
I've been using the same K3, KPA1500, and Astron power supply for many
years. I shut off the amp and could still hear the chirp.
One thought is that it has something to do with my power supply, although I
saw a previous posting that made that seem unlikely (below). Wayne
mentioned something about KSYSN3 calibration, I had not heard of that
before, I will look into it.
If anyone has experienced a problem with chirp on a K3, let me know (it is
a K3 not a K3S).
Dana
In reply to this post
<http://elecraft.365791.n2.nabble.com/K3-past-chirp-report-tp7625892p7625898.html>
by Doug Smith [W7KF]
Under normal circumstances, it is impossible for a K3 or K3S for exhibit
"chirp." The synthesizer settles well before the rig switches from TX to RX
or vice-versa.
The KSYN3A (newer synth, used in the K3S) settles in well under 1 ms thanks
to its entirely digital architecture (UHF DSPLL, divided down).
The KSYN3 (older synth, used on the K3) uses a more traditional PLL with
its VCO running at the target output frequency. It normally settles in
under 5 ms. It can take a bit longer depending on the actual PLL voltage
and VCO frequency. This is accounted for in firmware.
If your KSYN3 were not properly calibrated, you might see a longer settling
time on one or two bands, most likely 6 meters. If you suspect this, refer
to the CONFIG:VCO MD menu entry. The K3 includes an automatic VCO
calibration routine that requires no test equipment and takes only a couple
of minutes to run.
Wayne
N6KR
On Jan 19, 2017, at 12:57 PM, "Ron D'Eau Claire" <[hidden email]
<http://elecraft.365791.n2.nabble.com/user/SendEmail.jtp?type=node&node=7625904&i=0>>
wrote:
In a synthesized VFO rig like the K3S, any tendency to "chirp" is almost
always related to the synthesizer momentarily losing frequency (or phase)
lock.
While that could conceivably be linked to change in the power bus
voltage, it's highly unlikely since the bus is isolated from the actual
synthesizer by voltage regulators and filters.
OTOH, the OO's report was strictly advisory. I have experienced spurious
OO reports over my >50 years of pounding brass, and one that turned out to
be accurate when I blew the filter caps in the transmitter and did not
notice, nor did the stations I was working report the hum on my signal.
When I got a "chirp" report one time (on a homebrew rig) and was unable to
hear it myself, I sent a friendly letter to the OO. He replied that he was
"almost sure" he could detect a "slight chirp" so he sent the card.
So my advice is that if you can't repeat what the OO observed, don't
worry about it.
73, Ron AC7AC
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