When Windows updates it sometimes changes my KX3 settings. Not exactly
something you would think of when trying to diagnose a problem with the
radio. If your K2 is connected to Windows in any way, that might be the
explanation.
73,
david
KC1DNY
On 2/16/2024 11:58 PM, Jim KO5V wrote:
Good
Hi Jim,
I don't have an answer to your question, but
will note that you are the 2nd person in the last
month to report this issue. Thomas, WA8UNS
also experienced repeated random resettings
of the CAL TPA parameter to large values, often
in excess of 200. He reset the parameter to
the actual
Good Evening,
As I was talking on 20M SSB tonight, my K2/100 started to get a bit twitchy
when I transmitted. The power was set to just below 100W. I started seeing an
intermittent 'High Current' error message, which then changed to a constant
'Hot PA' error. I have an intermittent RFI problem
Don and Dave, thanks for the responses. The idea with the ground
contacts is interesting.
Regardless of whether it makes a difference, I will check and clean the
contact surfaces once the next time I open the base plate.
I have not paid attention to this detail before.
73, Wolfgang
DL2KI
--
The only reason I can think of why this might apply is if the grounding
of the bottom cover was poor. Whilst it certainly can be poor, because
of paint not having been properly masked around the mounting blocks, and
I recommend cleaning all paint off, around them, I'd be surprised if
enough
Wolfgang,
In my experience, that is not necessary.
It IS necessary to have the bottom cover in place before running CAL PLL.
73,
Don W3FPR
On 7/30/2022 11:25 AM, Wolfgang wrote:
Hi,
in a german QRP forum I found this hint from Peter, DL2FI (SK).
In any case, the PLL calibration must be
Hi,
in a german QRP forum I found this hint from Peter, DL2FI (SK).
In any case, the PLL calibration must be redone whenever the bottom cover of
the K2 has been opened.
This statement does not correspond to the instructions in the K2 manual
and other contributions here. Also, I can't
Chris,
Is the K2 CAL FCTR reading steady when you measure TP3 with the internal
probe?
If not, there is something wrong with either the internal probe or with
Q9 and Q10 on the control board. Replace CB Q9 and Q10 with PN
transistors and see if that corrects the reading.
Once you have
Hi all,
I have a K2/100 and a K2/10. I noticed that K2/100 is having an issue with
the frequency calibration, so I decided to fix it today.
When I set the band to 10m and connect my external GPSDO frequency counter
and the FCTR probe to TP1. The internal counter keeps changing its
frequency
Having Fun:
A popular K2 CAL FIL method is using Spectrogram as documented here:
http://www.elecraft.com/Apps/new_fil_docs/k2_ssb_gram.pdf
Having an oscilloscope with a FFT math function, I wondered how it would
do with a newly acquired Elecraft N-Gen. Results: I was able to perform
the FIL
Fixed! A year of looking at solder joints, and flowing a few, did not
fix the problem. I recently ordered and replaced L33 and the two BFO
crystals. The three parts fixed the problem! Replaced L33 so that I did
not need to worry about breaking the fine wires when removing the old one.
John KN5L
My K2 has a 100 Hz difference in CAL FIL frequencies between cold and
full warm up. The 100 Hz difference renders the 200 Hz BW unusable until
the K2 warms up.
Is this typical, or do I have a component with excessive temperature
instability?
John KN5L
John,
The specified stability for the K2 is less than a 100 Hz drift from a
cold start at 25 degC, so your K2 is within the specification (granted
it is just on the border). The drift will usually be worse for a K2
with the KPA100 installed than a basic K2 because there is more heat
Hi Don,
My question is directed specifically at the CAL FIL BFO frequency being
100 Hz different between cold and warm. As mentioned, because the BFO
frequency is off by 100 Hz, the 200 HZ filter is unusable because a
properly received pitch will place the signal on the filter skirt.
This K2
Performed another test today, last night I aligned 200 Hz CW normal to
04913.08, First power up this afternoon 04913.21, after one hour warm up
(no transmitting) 04913.10.
John KN5L
On 07/24/2013 12:39 PM, John Oppenheimer wrote:
Hi Don,
My question is directed specifically at the CAL FIL
I reset the EEPROM on my K2 SN#4454 because it stopped responding to COM PORT
1 commands from Ham Radio Deluxe. This cured this problem but now when I
turn the radio dial the frequency readout changes but the frequency is not
changing only on the 40 meter band. I am attempting to run CAL PLL but
Bill,
It sounds like the 40 meter frequency is incorrect - the K2 detects that
during a CAL PLL attempt.
Do you have the K60XV installed or the rework eliminator for the K60XV
option?
If so, enter the secondary menu and once again set D19 = y - your
master reset would have wiped out that
I've just redone the freq cal using WWV CAL PLL on my ol' K2 #1411.
Getting ready to do CAL FIL for CW filters then will do CAL FIL for SSB
filters using my K2SB manual.
However, looking at the latest K2 manual, I noticed that the CW settings
for CAL FIL are different than my version of the K2
Just finished Part 2 of my K2. All tests worked fine, but now I can't get the
Cal S functions to work correctly. Cal S Lo works ok, but I can't get Cal S hi
to turn off (yes, I have the RF gain fully CCW). When I leave Cal S Hi at the
maximum value I can (display is 000, and the far fight
Clark,
The most likely reason is that your filters are currently not set
correctly for single signal reception and allows the BFO to leak some
signal into the IF passband.
I suggest you wait until you have all bands working and after you have
done an alignment of the BFO frequencies (and
Nick,
I know you got many responses to your question about frequency calibration on
the K2.
I just wanted to give you my slant on this.
When I calibrated my K2, I set up the K2 as a counter. On the tip of the
counter jumper cable you built, wrap a little piece of bare wire around the
banana
Saw a article in FISTS news letter about mods for a K1, Changing USB to LSB,
Does any one have comments if this works and why do it ??.
Mod is remove RFC1 and jumper it, then realign BFO
Bob KC8IPQ
___
Elecraft mailing list
Post to:
Bob P wrote:
Saw a article in FISTS news letter about mods for a K1, Changing USB to
LSB,
Does any one have comments if this works and why do it ??.
Mod is remove RFC1 and jumper it, then realign BFO
In the article I believe Harry explains his reason for doing this. First note
that he is a
Bob,
I guess it is worth a try if you really want to do that. The BFO
frequency must change to the other side of the IF.
One reason I can see for changing USB to LSB is to change the pitch of
the received signal note as you tune upward in frequency. With USB, the
pitch decreases as you
Hi, all concerned:
I get the operation of the hfo in general terms -- the PLL part, anyway.
I'm looking for (links to or) a fuller explanation of what happens in this
process: number of points, interpolation, etc.
TIA 73, Dave, N3HE
___
Hi David,
I'm looking for (links to or) a fuller explanation of what happens in this
process: number of points, interpolation, etc.
To find out on your own, you could try this:
1. Get a stable CW signal source.
2. Get the spectrogram program.
3. Setup spectrogram for very high resolution.
4.
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