Woodie,
You have apparently dialed the VFO from one band to another on 17m and
15m. The K2 VFO will not follow that much outside the ham bands (even
thought the VFO display will change).
The fix is easy - do a Direct Frequency Entry to a frequency within the
ham band for both bands.
Then
I sent the note below to support, but thought I would also post here.
It has been working fine for years. Opened the case to do an alignment
and developed a problem. Anyone on the reflector have a suggestion?
I have an elderly K2 (S/N 02600) that had been
Hi to the List,
I was wondering if there is anyone living close to Chester (in England) that
would be willing to assist me with trouble shooting my K2.
The basic problem is with getting the rig showing full power output at QRP
levels and fully setup.
If you can help please feel free to phone me on
Hi all,
I aligned the KAF2 using a XG1 and Spectrogram. I tried the broadband noise
method, but found the line for the peak very coarse, it seemed the XG1 peak
was much more stable and easier to discern. Regardless, I thought I had R1
and R2 really dialed in for both AF1 and AF2.
AF1 seems to
Brian,
You are being deceived by using a single signal source. It is very
difficult to adjust a filter using a single signal because you have to
plot the shape of the passband using many data points obtained by tuning
the VFO through the signal very slowly. A noise source and Spectrogram
Don,
Thanks as always, your advise was spot on.
I found that the range where AF2 is in its happy place is fairly narrow,
but your method got it dialed in.
The KAF2 is very useful for CW.
73
N5BCN
-
K2 #6800 KPA100/KAT100-2, KSB2, KAT2, KIO2, K160RX, KNB2, KAF2, LP-PAN/K2 w/
Pre-amp,
It is very value for money especially a second hand unit.
Sent from my iPhone 4
Brian - N5BCN n5...@yahoo.com 於 2011年6月6日 上午8:17 寫道：
Don,
Thanks as always, your advise was spot on.
I found that the range where AF2 is in its happy place is fairly narrow,
but your method got it dialed
My K2 was operating fine, has the SSB module the latest addition, and
The KTA100 addition. Has been working fine for a week since the SSB
addition. Was on 80 meters tuning up on low power, 3 watts, and the
lights went out.
Removed the KTA100 and SSB board on QRP with power to min, press
Of richard gilley
Sent: Thursday, November 05, 2009 4:30 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K2 trouble on the tracks
My K2 was operating fine, has the SSB module the latest addition, and
The KTA100 addition. Has been working fine for a week since the SSB
addition. Was on 80
Dick,
That behavior is typical when the K2 is drawing too much current. The
resettable fuse (F1) on the RF board (right edge) trips. Please confirm
this by making the voltage measurement Ron suggested - if there is
voltage on one leg of the fuse, but not the other, that is confirmation
that
Mike,
Other than the wiring paths for ENC A and ENC B signals through the
connectors and to CB U6 pins 8 and 16,
there is nothing else for these two signals. However, for the encoder
to be read, the /ENC RD signal must be at a low level and that signal is
generated from FP U3 pin 14. Look
Hi Don,
OK, on that line which is pin 14 on U3, there is only a couple mv but no
pulses. The state of that line never changes. The other strange thing is
the ENC-A data level only being 2v p-p verses ENC-B which is a full 5v
p-p signal. Shouldn't both ENC data lines be a full 5v p-p TTL
Mike,
Do you have the 'scope vertical amp set to DC? This is logic level
switching and the DC levels are significant, not the peak to peak
variation. Yes, the levels must be above or below the switching thresholds.
On the /ENC RD line, compare it to the levels at FP U3 pins 6 and/or 16
- it
Hi Don,
OK, I can see those signals on pin 6 16 easily. Pin 14 is dead. It
stays low. I am using DC coupling. ENC-A is only going to 2v and ENC-B
goes to 5v. Both those data lines show data when the encoder is spun in
either direction. Both lines will either rest at zero or a high state.
Mike,
Yes, it sounds like you have it adequately analyzed and I do agree with
your conclusions. FP U3 has a bad pin 14 output and the MCU input for
ENC A also has a problem and is dragging the signal down.
73,
Don W3FPR
Mike-WE0H wrote:
Hi Don,
OK, I can see those signals on pin 6 16
OK, I will contact the Elecraft Parts department and see how to order
these two components. Thank you again and lets hope this is the final
answer to this damaged K2. I will post when and what all was required to
repair this radio on this reflector so it may help others if they run
into this
Hi Don,
Ref K2 #6698:
I tried a new encoder but it did nothing different than the original
encoder. Tonight I see that ENC-A is only 2v p-p while ENC-B is 5v p-p.
This is measured right on the encoder terminals and on the U6 MCU chip.
I don't see any resistor network pull ups on these lines.
I do briefly see a high current message - forgot to mention tha.
Don Wilhelm-4 wrote:
Bill,
Since it misbehaves with the dummy load, you will most likely find the
problem in the base K2 160 meter Low Pass Filter.
I am surprised that you do not also see Hi Curr messages.
73,
Don
Now that I have my K3 at home I moved my K2/100/KAT100 to our lake cabin.
Last weekend it started to shut down on 160 only when transmitting over
about 70 watts. All other bands are fine, the antenna (160M dipole fed with
ladder line thru 4-1 balun and about 6' of coax into the cabin) is fine
Bill,
What does that K2 do when working into a dummy load? If it still fails,
the problem is definitely with the K2. If it behaves, then you need to
look at your antenna system - you may be better off with a 1:1 choke
balun than your 4-1 balun. I really don't know why hams persist in
Thanks Don,
The rig behaves the same into the dummy load in all configurations with or
without the KAT100 in line, with or without the mike or paddles connected,
with or without attached and I even tried a different coax jumper. 160 is
the only band it occurs on. What is confounding me is that
Bill,
Since it misbehaves with the dummy load, you will most likely find the
problem in the base K2 160 meter Low Pass Filter.
I am surprised that you do not also see Hi Curr messages.
73,
Don W3FPR
NZ0T wrote:
Thanks Don,
The rig behaves the same into the dummy load in all configurations
Michael,
You apparently are having some kind of problem with the AUXBUS signal
inside the K2.
I doubt if a reset will do any good, but if you want to try it, record
all your menu settings (including all the filter settings) before doing
the reset because the reset will restore all those
Suddenly my DSP, Noise Blanker, Internal Antenna Tuner, and XV50(will not
power up when I change band to 6M, I have checked all cables for
continuity.) will not operate. When I try to set my Noise Blanker the not
installed message shows on the display. When I try to toggle my way through
to the
@mailman.qth.net
Sent: Friday, December 14, 2007 3:05 AM
Subject: [Elecraft] K2 trouble
I have a problem with the first part of section 3
testing. I set the power level to 2.0. When I press
and hold tune I get HI CUR on the LCD for about
1/2 second and power is at .1. Nothing seems to be
warm. Q6, 7
I have a problem with the first part of section 3
testing. I set the power level to 2.0. When I press
and hold tune I get HI CUR on the LCD for about
1/2 second and power is at .1. Nothing seems to be
warm. Q6, 7 and 8 all seem Ok and not shorted.
Anything I might have missed before I start
26 matches
Mail list logo
