With a solar flux of only 73 tonight the 20 meter band was open to VK/ZL and
most of Europe all at the same time! My new K3/10 kit is finally complete and
the Elecraft MOJO is working.
Having too much fun!
73,
Bill - K6WLM
KX1, K2, K3
My AF knob was 'funny' earlier in the week. Scott at Elecraft talked to
me Friday on the phone and patiently waited for me to stop sobbing.
Later in the day the knob 'crumbled' just before the contest started. A
panic run to the hardware store provided a 'jury rig' solution that I
will
Dave,
I too operated SOSB20 as GW6W last weekend and concur with your observations
including being slightly uneasy at times at being able to slot in so close
to neighbouring signals - didn't suffer any 'band rage' though so presumably
they would be using something decent too. We were in the
Hi All,
Yesterday I sinned and whistled shortly into my microphone to see my watt
meter reading.
I apologize for this bad bad operator habbit...
To my surprise I heard a second whistle monitoring the signal.When I
whistled up the other whistle was going down in frequency, when I whistled
down
Correction on the above (should dust off the old books some day...)
I wonder if there is any 1/2 nyquist filtering (should be 1/2 Fs filtering)
in the RF processor algorithm, and what the actual sampling rate (should be
samplingfrequency) of the RF processed TX signal is.
73'
Paul
PD0PSB
--
I used LP-Pan for the first time in the WPX contest. I was surprised to see
how the display exploded with signals at the beginning of the contest. Holly
moley, where do they all come from? I like to believe I'm not into
contesting all that much but have to admit I got really caught up in it this
Richard, your comment about Golden years was right on. Amen. At 73
rotations, I'm a little slower, my right hand has a bit of the palsy, and I
need a nap after lunch. But, I still love Ham radio. Fortunately, the great
people at Elecraft came along. The K3 is, hands down, the best rig I've ever
I had time last night to work on the problem I was having getting CW
Type to key the K-3. I was getting the red transmit light but no RF
going out the wire. VOX was on and the K-3 was not in test mode. I
found that my difficulty is understanding the PTT-KEY menu selections.
I cycled
Tom,
Great report. I feel the same about the display. Being a Flex 5000 guy
before the K3, I just had to purchase the LP Pan because I felt lost.
Unless someone has used this tool, they just don't know how wonderful it is.
I hope Lp will eventually have use of all the buttons on the screen like
Richard, K5BWV, wrote:
Echoing others on this thread, the DSP at 250Hz with the 250Hz 8 pole
filter was used most of the time. Sweet! ...I also did notice many
signals had monstrous sidebands due to 'key clicks'.
---
Putting a strong signal
Stewart GW0ETF wrote:
I too operated SOSB20 as GW6W last weekend and concur with your observations
including being slightly uneasy at times at being able to slot in so close
to neighbouring signals - didn't suffer any 'band rage' though so presumably
they would be using something decent too.
Richard Davis wrote:
My AF knob was 'funny'
a panic run to the hardware store...
will probably use as a permanent knobuntil Elecraft offers
knobs with brass sleeve inserts to absorb the stress caused by the set
screws.
Richard,
The knob you have was from a small batch manufactured
That's not the problem. The crap I was hearing was often 2 to 3 KHz away, and
from signals no louder than others on the band. On the other hand, I could
slide up within less than 200 Hz of the guys with clean signals (even S9 plus
20 db or louder) and not even know they were there.
Key
SNIP:
And when you use CWT centering maximizing the decoding accuracy, you get
spot-on, consistently repeatable tuning. No RIT needed. Of course that
assumes search and pounce is the preferred style of operation.
If you park on a frequency and call CQ you surrender tuning control to
the
~
N2CQ QRP CONTEST CALENDAR
June 5 - July 5, 2009
~
Digital Pentathlon (PSK) 50W Max
June 5, 1800z to 2200z
Rules: http://dqso.net/index.files/digipen-en.html
SNIP:
And when you use CWT centering maximizing the decoding accuracy, you get
spot-on, consistently repeatable tuning. No RIT needed. Of course that assumes
search and pounce is the preferred style of operation. If you park on a
frequency and call CQ you surrender tuning control to the other
Yes, Wayne has developed optimum CW shaping on both the K3 and the K2. It's
more than just rise and fall times. The shape of the transition is important
too.
But even a very simple cathode-keyed vacuum tube rig with minimal click
suppression shouldn't produce anything significant out a 1 kHz or
Greg Storms wrote:
I had time last night to work on the problem I was having getting CW
Type to key the K-3. I was getting the red transmit light but no RF
going out the wire. VOX was on and the K-3 was not in test mode. I
found that my difficulty is understanding the PTT-KEY menu
Hello Paul!
Yesterday I sinned and whistled shortly into my microphone to see my watt
meter reading. I apologize for this bad bad operator habit...
To my surprise I heard a second whistle monitoring the signal. When I
whistled up the other whistle was going down in frequency, when I
I have always found it a bit difficult to judge my own speech quality when
using the monitor function on any radio. Perhaps a substantial delay,
several seconds, would be helpful in letting one listen to oneself after one
has finished speaking.
I'll look into adding some filtering to reduce
When switching my K3 from RX to TX 100W FM, I measured these voltage drops:
0.03V directly at the Astron RS-35M's output
0.25V at an unused output of a WMR RIGrunner, connected to the RS-35M by a
2ft cable
1.00V as indicated by the K3, connected to the RIGrunner by a 4ft cable
By cable I mean
Get the KDVR3, record an outgoing message, then monitor it being
transmitted (and adjust settings to your liking) ;)
~Iain / N6ML
Erik N Basilier wrote:
I have always found it a bit difficult to judge my own speech quality when
using the monitor function on any radio. Perhaps a
Hello Lyle!
Tnx fr replying.
I can confirm that the MON function is causing more aliasing.
I cannot confirm that the artifacts are not in TX audio.
With settings around CMP 10 I can start hearing double whistle aliasing
monitoring on an ext receiver.
Without RF processing the signal is very nice
If this is a serious issue to folks as it appears to be, use a power supply
with remote sense and attach the sense lines at the Powerpole at the back of
the K3.
My gut feel is the DX will never know the difference.
Terry
- Original Message -
From: hb9brj
To:
I also find listening to myself on the monitor a bit awkward because I hear
my voice by paths other than that of the radio. I think this can be
largely overcome if you use the Voice Recorder and take a listen afterwards.
The recorder is a very useful feature.
I hope Elecrafter eventually
Hi group,
Running K3 S/N 0192 here. Installed my KRX3 last autumn and up until now all
has been working well. Of course I've only been operating on the lower bands
during winter.
I just noticed that my KRX3 does not work on 12 and 10 metres. Not sure
about 6m since I don't have a dedicated 6m
Fred,
I was tuning around 10 during the contest and ran across a gent higher in
the band signing /QRP. Turns out he wasn't in the contest, but I called him
anyway and we had a nice QSO.
He is 82 years old and was running a K2 and waiting on a K3. We chatted for
a while. Think my straight key
Thanks for the idea, but I don't use voice enough to justify a monitoring
solution that has a real cost to it. I don't think I would used the KDVR3
for any other purpose. On the other hand, if there will be a delay for
purposes of anti-aliasing, that might solve the problem at no cost. The
On Wed, 2009-06-03 at 09:36 -0700, xda...@cis-broadband.com wrote:
...
There has been suspicions that some contesters purposely
let their rigs generate clicks in order to create elbow room.
Given the crud I hear from some pretty high profile contest
stations, both DX and domestic, I'm
Hello Paul!
I can confirm that the MON function is causing more aliasing.
I cannot confirm that the artifacts are not in TX audio.
With settings around CMP 10 I can start hearing double whistle aliasing
monitoring on an ext receiver.
Without RF processing the signal is very nice clean.
The
On Wed, 2009-06-03 at 10:59 -0700, hb9brj wrote:
...
Guess the major problem resulting from voltage drop is a reduced efficiency
of the KPA3.
Actually, for a given power level the KPA3 probably has better
efficiency. For lowest heat in the PA, the supply voltage should be as
low as possible
More than likely you have the antenna selection set to something you do not
want.
With the sub rx on, HOLD the RX ANT button. This toggles between sharing the
antenna with the main RX and the AUX position, which is either the unsued KAT3
antenna or the AUX RF BNC connection...depending how
- Original Message -
From: Greg - AB7R a...@cablespeed.com
To: elecraft@mailman.qth.net; 'ON4WIX' on4...@skynet.be
Sent: Wednesday, June 03, 2009 8:32 PM
Subject: Re: [Elecraft] [K3] - KRX3 not working on 12/10
More than likely you have the antenna selection set to something you do not
Hi Greg,
you just made my day. I have warned many owners about this problem but in
the meantime I must have forgotten about the sub RX antenna selection issue.
As I have not operated on 12/10 since installing the sub RX it was an easy
oversight. Many thanks, all is fine now!
73
Glenn
Well, I'd bet that a rig with bad clicks overdriving an amplifier could
generate some pretty wide trash. Some of what I heard was so bad, though, that
I half suspect they had bad timing for the T/R relay in the amplifier ...
essentially hot switching the amp.
73,
Dave AB7E
A common question concerning inductors wound on toroid cores is whether
a retaining compound should be used to fix the windings in place.
In the case of the cores used in the K2, retaining compounds are not
necessary and should not be used. However, this question still comes up
and there are
Hello All;
I'm a new guy in here. I just got my K3 a few weeks ago and I've
been having a blast. My main interest in the hobby has been
operating the soundcard digital modes
I have been enjoying this thread on the WPX contest last weekend.
The contest has really sparked an interest in
I guess the most interesting thing is that we never heard back from Harris,
K9RJ, about his setup!
What se ye, Harris?
73,
Steve
NN4X
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Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
I've made some measurements of my K3's efficiency versus DC supply
voltage, output and frequency at
http://www.cliftonlaboratories.com/elecraft_k3_efficiency.htm
Jack K8ZOA
www.cliftonlaboratories.com
Alan Bloom wrote:
On Wed, 2009-06-03 at 10:59 -0700, hb9brj wrote:
...
Guess the
The graphs show: the lower the power supply voltage, the higher the
efficiency.
The reason: When you set the K3 to, say, 100W it has to put 1.4A into
the 50-ohm dummy load (P = I^2R = 1.4^2 x 50 = 100).
The DC current through the PA transistors is pretty much directly
proportional of the RF
Why not use hot glue on the toroids in the K2? That link shows hot glue
as a very good wire retaining compound. Does anyone have any data that
suggests a K2 would not function to the manufacturer's spec's if hot
glue was used on all the toroids?
--
Mike
WE0H
K2 #6698
Jack S wrote:
A
Mike:
If it isn't needed--which is is not in the K2--don't use it. My
measurements do not, for example, show the long term effect of retaining
compounds. Nor do they show what happens when the temperature is
increased and some compounds soften. I'm reasonably confident Q-Dope is
stable from
Hi Gang,
Please delete this if its against the rules.
Just wondering where the best place is to find a used K1?
THanks
Duane
--
bw...@fastmail.net
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
This is a great place to post such a question, and perfectly
appropriate. Used Elecraft gear appears often on this list, and you
can receive many helpful hints on operation just by asking too.
- Jim, KL7CC
dw wrote:
Hi Gang,
Please delete this if its against the rules.
Just wondering
Alan,
Your analysis is correct - BUT --
Efficiency is one thing. but it has been previously discussed that
higher DC voltages result in improved IMD.
So the best voltage to be used is a compromise (efficiency alone is
not the only consideration). My preference is to stay with the 13.8 volt
Very true. There is a tradeoff between efficiency and distortion. The
K3 has good cooling, so for a fixed station where power consumption is
not an issue, you might as well keep the PS voltage fairly high. It
also might give you a little more power output 6 meters which tends to
run a little
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