On Feb 21, 2005, at 11:39 PM, frank wrote:
I'm getting close to order a K2 but I have a few questions.
The K2 would be for CW operation only.
Like many others, I prefer to tune the band using wide bandpass of
over 2khz and only use narrow CW filter operation when band
conditions require it.
This KSB2 is not working properly. It is built very well and works great in
the OP1function but not in the CW function. Likewise I am not asking a lot
for it. Rather than take the time to troubleshoot, I just bought a new kit.
Make an offer.
73
Alan
I'm getting close to order a K2 but I have a few
questions.
The K2 would be for CW operation only.
...
I have decided not to order the DSP filter but perhaps
the passive
audio filter. The passive audio filter appears to be
set up for
80hz bandwidth which is way too narrow for my
(Could be also in Does anyone miss passband tuning, audio notch on K2?)
Hello Electrafters,
I re-discovered my Datong FL-3 filter in the attic, and I wonder if that
would not be a solution : it has a secondary fixed output. I guess that
other brands of external filters have the same feature.
Dear Alan,
it is two times that I write privately to your e-mail [EMAIL PROTECTED] but
this is the mail server answer:
- These recipients of your message have been processed by the mail server:
[EMAIL PROTECTED]; Failed; 5.3.0 (other or undefined mail system status)
so please give me
Fran,
You have the calculations correct - I use Vp-p^2/400 all the time for a 50
ohm load. I use the 'scope probe connected directly across the dummy load
(the 'scope probe has a short grounding lead).
It is quite unlikely that the power output really climbs with power, so
there must be
Hi Frank,
I have an early unmodified K2 #402 and it is gangbusters on 5W CW with one
of the unmodifieed early KSB2s. I would not change a thing on mine as the
performance is so good, but with the filter improvements on the newer KSB2s
I think you should just get the K2 and the KSB2 as far as
Here are a few facts about Polar Bears you might want to remember!
Please read to the bottom. -- WA3WSJ
In the wild, adult polar bears live an average of 15 to 18 years, though
biologists have tagged a few bears in their early 30s. In zoos, many
captive bears live until their mid- to late 30s.
This may be a bit off topic, but I think the mountaineers and trailblazers
using KX1's might be interested...Several years ago I received a gift pair
of ear warmers called 180s...They are made of Polartec and are designed
to be worn on the back of the head...This week the XYL was browsing in
I prefer to use my K2 on CW only as well. I bought the SSB Module in case I
would like to try other digital modes such as RTTY or PSK. I haven't heard the
K2 without the SSB module so I'm not sure how to compare the filters, but the
filters with the SSB module do sound nice and I've never had a
Please remember that these Polar Bears will have cold paws and cold
paws don't work fast.
If we make mistakes sending it is because we have:
1.Cold paws2.gloves on 3. just plain sloppy - polar bears are
like that!
72,
Ed, WA3WSJ
___
Elecraft
Hello all.
I have been working on K2/100 #4684.
It worked beautifully in a QSO with my brother on 40m last weekend until
the power out went to 0.
Doing some troubleshooting with the procedures in the manual this is
what I came up with.
I started with the receiver and those measurements were
Has anyone been successful in pushing the K2 beyond the 70 WPM external
keying limit for CW operation? Does it adhere to spec (70 WPM) or
differ in practice? Anyone try any hardware or firmware mods to bump up
the speed? I'd love for this great high performance CW rig (or even the
K1 or KX1,
Is the K2 unsuitable for listening to SSB if the KSB2 isn't installed?
73,
Dave
N7AF
The SSB filter is much more pleasant to use than the CW filter set for
a wide bandwidth. The SSB filter has a flat passband, whereas the CW
filter, being varactor controlled, develops a lot of ripple by the
Kevin,
From the resistance readings on Q7 and Q8 you appear to have shorted final
transistors. I'm not certain how it happened, they are quite hardy
transistors.
If you havn't already, repeat the resistance measurements with the heat sink
removed on the chance that you just have a short to the
Dave,
The variable filter is not completely unsuitable for SSB listening, it just
has a high passband ripple which can become tiring after a time to some
people's ears. I use the variable filter as a narrow SSB receive filter to
combat high pitched QRM (1.8, 1.7 or 1.6 kHz widths), but it does
Thanks for the replies Don, David, Philipe. Sounds like it ought to work.
I'm a CW man on the verge of ordering a K2 but like to just listen to SSB
while I'm puttering around the shack.
73,
Dave
N7AF
- Original Message -
From: W3FPR - Don Wilhelm [EMAIL PROTECTED]
To: Dave Lowenstein
W3FPR - Don Wilhelm wrote:
Kevin,
From the resistance readings on Q7 and Q8 you appear to have shorted final
transistors. I'm not certain how it happened, they are quite hardy
transistors.
If you havn't already, repeat the resistance measurements with the heat sink
removed on the chance
On Feb 22, 2005, at 11:43 AM, Andrew Moore wrote:
Has anyone been successful in pushing the K2 beyond the 70 WPM external
keying limit for CW operation?
At 60 wpm, each element is 20 ms long. Given a 5 ms rise and fall time
(assuming you've made the key-click mod), that's only 10ms of
Here's my question - what person can copy 100 wpm? Only a handful of
people in the world can copy 60 wpm!
I'd guess it's a larger group than you might think -- though I'd agree
those folks are few and far between. I've run into a handful than can
copy 100, and I remember about 10 years ago I
And then there are those of us who gave much of our hearing away many
years ago and now can't tell the difference between my stock CW K2 on
SSB and a really tricked out K2 with all the bells. In a low noise, no
QRM, strong signal environment, my K2 sounds great on SSB. In a noisy,
QRM'ed, weak
100 wpm, elements are only 12 ms long - barely 2 ms at full
output. At that speed, I'd begin to wonder about the group
delay response of the remote receiver's filters
I once asked about this on the Ten Tec reflector during a discussion of high
speed CW, but some of the high-speed guys
When I was a novice, Cecil WA5SFZ, could copy 60WPM on a Mill, which was
a typewriter version of a RTTY keyboard (all uppercase). Cecil smoked a
pipe, a habit he picked up when copying news for press agencies (UPI?),
as one of the perks of the job was free pipe-lighting service to keep
the
Hello,
I am leaving for the AT now at 19:00 UTC.
I decided to take my K2 instead of the K1 and the SW-20+, this will be it's
last trip on the AT for the K2. I will have a mic and will do SSB if
requested.
I will try 15 meters first around 21:00 UTC, if no replies I will go to 20
meters.
I've successfully made the following mods to two K2/100's, (both latest
spec/upgrades). The QSK mods are based on previous posts on the Elecraft
reflector.
QSK. Firstly, on the control board, cut the short track between U6 pin 17
(RC2 /MUTE) and the junction of C23/R17. Solder a 220k resistor
The Summerland Amateur Radio Club from Lismore has won the all-band
all-mode multi-operator section of the Australia-wide John Moyle Field
Day contest. The HF rig used was Elecraft K2 #3666 with Tokyo Hi-Power
HL-200B amplifier.
Mmh, head scratching who has won the contest? The K2 or the PA.
Hello all,
Click on the link for the Polar Bears of Pulpit Rock Web Page.
http://www.wa3wsj.com/files/PolarBear2005.html
72/73,
Ed, WA3WSJ
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On Tue, 2005-22-02 at 19:53 +0100, Ingo Meyer DK3RED wrote:
The Summerland Amateur Radio Club from Lismore has won the all-band
all-mode multi-operator section of the Australia-wide John Moyle Field
Day contest. The HF rig used was Elecraft K2 #3666 with Tokyo Hi-Power
HL-200B
On Feb 22, 2005, at 1:16 PM, Andrew Moore wrote:
Here's my question - what person can copy 100 wpm? Only a handful of
people in the world can copy 60 wpm!
I'd guess it's a larger group than you might think -- though I'd agree
those folks are few and far between. I've run into a handful than
Color me skeptical. I wonder if it is a mind reading trick. I wonder
how accurate a computer sending CW would be at 100 wpm -- or how well
it would sound passing through a repeater.
Not mind reading (he corrected me on my grammar too), nor machine copy
(what are the chances he happened to
- Original Message -
From: Ingo Meyer DK3RED [EMAIL PROTECTED]
To: Elecraft elecraft@mailman.qth.net
Sent: Tuesday, February 22, 2005 1:53 PM
Subject: [Elecraft] Re: Contest win using K2
Mmh, head scratching who has won the contest? The K2 or the PA. ;o))
--
72/73 de Ingo, DK3RED
...
have astounded the audience by calmly sipping a cup of coffee then lighting
an cigarette while the transmission blasted away before sitting down at the
mill (typewriter with all cap letters specifically for copying CW). Then he
is reported to have kept typing 15 minutes after the
In a message dated 2/22/2005 2:51:15 PM Eastern Standard Time, Bill Coleman
[EMAIL PROTECTED] writes:
On Feb 22, 2005, at 1:16 PM, Andrew Moore wrote:
The highest official CW speed was about 74 wpm, a record that was set
decades ago and never overturned. If there's so many people who can
copy
Andrew Moore wrote:
This sounds interesting. I've never heard much about it. Are high
speed CW ops using this in lieu of the real thing to get around rigs'
limitations? Since it's on SSB, I assume it's not legal down in the
conventional CW portion of the band. It sounds like it could be
On Tue, 2005-22-02 at 14:59 -0600, R. Kevin Stover wrote:
Another happy benefit of audio injected CW, really afsk, is that there
are no key clicks to be heard and you don't have to worry about rise and
fall times of the keying waveform.
Wouldn't that depend on the audio waveform fed into the
Why wait?
Dan / WG4S / K2 #2456
snipAfter all, we have the schematics (er, or I will once I order my new
K2! :)/snip
http://elecraft.com/manual/K2_AppF.pdf, starts on page 138.
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Andrew, NV1B, wrote:
This sounds interesting. I've never heard much about it. Are high speed CW
ops using this in lieu of the real thing to get around rigs' limitations?
Since it's on SSB, I assume it's not legal down in the conventional CW
portion of the band. It sounds like it could be an
It may be of interest to people to hear that I fired up my one week old K1
during the contest and in just over one hour's operating running 5 watts worked
15 North American stations in
IN, ON, PA, NJ, PEI, DEL, NH, MA, TX, CT, and VA.
Thanks Lads
73
George. G3ICO.
Just thought you folks might like to know that I've resumed construction
of K2 S/N 1341, after more than four year's hiatus.
Stuff happens.
Oh, my callsign is now K3XS...ex-KB3DXS.
73 to all
-Maggie-
(Yes, I know there have been a lot of improvements to the kit in the
intervening
I am still in awe of the very unique engineering of the K-2. I hope to work
as many of other elekraft hams at the next SEA-DuBya(CW) contest.
73 DE MIKE
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Hi Maggie,
Have fun building your K2. I hope to work you soon!
73/72,
Barry, W2BJ
On Tue, 22 Feb 2005 17:14:02 -0500
Margaret Leber [EMAIL PROTECTED] wrote:
Just thought you folks might like to know that I've
resumed construction of K2 S/N 1341, after more than four
year's hiatus.
I don't know whether or not this has been posted before (certainly I
have not seen it here) but on the Ten-Tec reflector this message just
came through:
***
Is that Yaecomwood as opposed to Tencraft?? :)
Ron
Wb1hga
Peg writes:
.. Now he is dreaming of an Omni VI+ someday, instead of a
R. Kevin Stover wrote:
Another happy benefit of audio injected CW, really afsk, is that there
are no key clicks to be heard and you don't have to worry about rise and
fall times of the keying waveform.
The extent of the sidebands (and therefore the rise/fall times and the maximum
speed that
My K2 has the 2nd latest chip set in it. It is a 3200 s/n. I have been using
it on SSB at 12W.
I have the audio compressor on max.
I have had hours of great QSO's so far. I know see an option to open up
the SSB filter on RX. I use the stock 2.2khz and I like the audio. I find the
1.8khz
Vic wrote:
The extent of the sidebands (and therefore the rise/fall times and the
maximum
speed that can be transmitted) are limited by the width of the ssb filter.
A
signal generated this way can be quite clicky -- I would consider a 3 KHz
wide
CW signal way too wide.
-
Yeah! On
Thanks to all who were ready to check in last week. I apologize for having to
back out at the last minute, but something urgent came up (radio is important
to me... but it's still just a hobby).
I'm going to try to run ECN/30 on Thursdays on 10115 +/- 2. The early net will
start around 6 PM
All,
Thanks to all who answered me either direct or on the list.
Based upon the answers I would guess that I need to pay better attention to
lead length. I did not make any attempts to keep things short.
I will also think about Ron's suggestion to bypass the KAT2.
I'll post the final results
Hmmm... Interesting, but perhaps Eletec is better since it puts the horse
in front of the cart!!! ;-)
Cheers,
-rick, K7LOG
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Joe Malloy
Sent: Tuesday, February 22, 2005 2:34 PM
To: elecraft@mailman.qth.net
Kevin Stover said ...audio injected CW, really afsk,...
Isn't afsk really audio frequency-shift keying as commonly used for RTTY on
VHF?
The signal produced by a well-adjusted SSB rig with a pure keyed tone
injected will be pure CW, undetectable from any other CW signal. The things
to be
Kevin, AC0H, wrote:
How do the rise and fall times of the SSB and CW waveforms compare?
Isn't SSB, even with VOX delay turned all the way down, a lot slower
than CW? If the SSB rise and fall times are slower than CW how do you
get clicks?
I would agree that nobody in their right mind would
Hello to everyone on the Elecraft Reflector. I subscribed to the Reflector
alittle over a week ago and have really enjoyed all the posts. It is good to
know that there are alot of really talented people out there who will be able
to
help me if and when I get in trouble building the K2. I will
I enjoy copying CW up to about 60 wpm, then problems. And I can offer a theory
for why.
The mind, not the ear, has a built in echo suppressor. When the ear hears the
same sound soon again, it sends its message to the brain, but the brain
interprets it, if the time between sounds is very
[EMAIL PROTECTED] wrote:
Hello to everyone on the Elecraft Reflector. I subscribed to the Reflector
alittle over a week ago and have really enjoyed all the posts. It is good to
know that there are alot of really talented people out there who will be able to
help me if and when I get in
Hello,
The time is 03:45 UTC and I just finished taking a shower. Wow did we have
a Great time up on the Appalachian Trail at Pulpit Rock near Hamburg, PA.
Half way up the 2 mile hike I was going over things in my head and I
remembered that I had no coax. Fortunately I caught Ed, WA3WSJ at
W3FPR - Don Wilhelm wrote:
Welcome back and have fun building. The upgrades are nice, but not
required - you will still have a fine working K2 when you are finished.
-Original Message-
Just thought you folks might like to know that I've resumed construction
of K2 S/N 1341, after more
Steve,
You CAN successfully build a K2 - if --- 1) you can do decent soldering and
2) you can follow written instructions. Honestly, that is all that is
required. The Elecraft manuals are excellent and the parts quality is
top-notch - you will not fail if you try (ask for help if you think you
Maggie, K3XS, wrote:
Oh, before somebody freaks, the actual serial is #1641, not #1341.
(I've made that mistake before. 1341 was my SAT score. Don't ask when
that was.)
--
Well dang! I though I had found another K2 almost as old as my five-year-old
S/N 1289. But then mine's
H... I am feeling a bit slow... Just realized that I am not getting
a an s-meter indication at all of received signal strength from any station,
weak or strong on my newly completed KX1. Have played with the SIG menu
adjustments and still nothing... I am using an external tuner and so
Hi,
just made the inventory for my new K1 and I am missing exactly 1 capacitor,
either C62 or C63.
Now I am wondering if I could substitute one of these with another value, if
they are not critical.
I have 240nF (241) in stock. Will this one work in one of the places? Or
can I parallel it with
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