I just wish we could get that kind of coverage and understanding over
here.
It appears in the US, the media and public are much more aware of the
part amateur radio can play in national emergencies and just generally
(you have a big country with places with no cell coverage etc).
73 de
Same situation over here David.
Even in items about CB or pirate music transmitters the media misuses the
term radio-amateur.
If you say a technical/regulations exam is mandatory for this hobby people
are highly surprised.
Why do you need that to play deejay on the air?
Even to the local
Hi Dale:
That 1/4 plug on the headphone cable that you are looking at might in fact
be the adapter. Gently pull it apart. You might be pleasantly surprised.
It's not visually obvious that it is a two part affair.
My Proset came with an instruction sheet that is titled:
Proset-K2 Assembly and
Greetings fellow Elecrafters...
A while back, maybe 2-3 weeks ago anyway, someone (in EU, if I recall) posted
a link to a headphone amp/splitter box which they're recently purchased.
I visited the link, but seem to have lost it in the hubbub of getting ready
for Field Day 2009... BUT I's really
Dear fellow Elecrafters,
has anybody compared a new 8-pole 500Hz filter from INRAD
to a standard 5-pole 500Hz? My intention is to have
a 8-pole filter in main RX and 5-pole in 2nd RX. Could there
be any problems due to different offsets?
Jan OM2XW
May be this HeadRoom link:
http://www.headphone.com/products/headphone-amps/the-mobile-line/headroom-total-airhead.php
73! Alex
UR5LAM
Tom Hammond:
Greetings fellow Elecrafters...
A while back, maybe 2-3 weeks ago anyway, someone (in EU, if I recall) posted
a link to a headphone amp/splitter
I have been using my K2 exclusively in the 100W configuration. I now want
to have the option of taking just the base radio and using it stand-alone
for QRP, but without compromising my normal use with the KPA100. I have
separated the KPA100 in the case with the antenna tuner.
I am
Small box, big price. Before I bought that, I'd look at what was
available from American Musical Supply, Musicians Friend, or Sweetwater
Sound.
www.americanmusical.com
www.musiciansfriend.com
www.sweetwater.com
Search for headphone amplifier or headphone distribution.
... assuming you in the
Tom Hammond wrote:
A while back, maybe 2-3 weeks ago anyway, someone (in EU, if I recall) posted
a link to a headphone amp/splitter box which they're recently purchased.
I visited the link, but seem to have lost it in the hubbub of getting ready
for Field Day 2009... BUT I's really like to
This is true.
I am looking at the connectors on my Proset-K2 and it has an 1/8 stereo
connector for headphones and an 1/8 mono connector for the mic. I have
no idea where the 1/8 to 1/4 headphone adapter went, don't really need it.
The interface cable converts the 1/8 mono mic connector to an 8
Tom,
That is taken care of automatically. If both the KAT2 and the KPA100
are detected, the KAT2 is set to ANT1 and cannot be changed until the
KPA100 is removed.
Of course, if both the KPA100 and KAT100 are connected to a K2 having
the KAT2 also, the ANT1/2 switch works, but it refers to the
Not sure about the US, but for anyone wanting this in the UK, take a
look at CPC -
http://cpc.farnell.com/jsp/search/productdetail.jsp?sku=AV1580902_requestid=87947
just what I've been looking for FD - 4 outputs with Volume controls on
each and 12v supply (extra, but I have 12v coming out of
Hi All,
I am wondering if this Beringer headphone splitter amp (HA400) will work
well with the K3. As long as it doesn't amplify or introduce hiss I would
imagine it would work well. Any comments? I have an old Heil Proset that I
mainly use, but others may use a wide range of microphones with
rant on
Behringer - They really bug me. Sorry to say it, but I do. They bug me
because they have a history of stealing other people's designs (Mackie,
DBX) and producing them very cheaply in China. Or at least that is the
way things appear and there is a history of law suits which suggests
This was published in 2007, and makes no reference to our exalted Elecraft
K3, but it's still very interesting reading, and indirectly on topic.
Thanks to Adam Farson, VE7OJ / AB4OJ, for translation and hosting:
http://www.ab4oj.com/dl/misc/dinosaur_concepts.pdf
73,
Steve
NN4X
I'm no lawyer but reading the regulations here:
http://www.fcc.gov/oet/info/rules/part15/PART15_07-10-08.pdf
I see this:
Scanning Receiver. For the purpose of this part,
this is a receiver that automatically switches among four or more
frequencies in the range of 30 to 960 MHz and which is
There's an old saying about the cheap comes out the more expensive...
If you're interested in expanding your Ham horizons into homebrewing, a
headphone distribution amplifier has to be just about the most forgiving,
inexpensive and simple project one might consider. Most radio/electronics
Nice article!
The only thing (besides initial price levels) that kept me away from SDR
based designs for a long time is computer generated interference. That's
also why the K3 shines as stand alone SDR.
It seems though computers/switching PSU's are finally becoming less RF
noisy, making SDR
Using the CW offset feature to go from SSB CW modes . Works as
advertised.
However when I click on a spot when in CW mode to go to USB something is
odd:
Example:
In CW mode at 50.110
Click on spot on 50.125
Radio goes to USB mode at 50.124.47 -- 50.125 minus CW offset of 530 Hz.
Anybody
If you click the same spot again does it then go the correct frequency?
N2TK, Tony
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Alsop
Sent: Monday, June 29, 2009 11:23 AM
To: elecraft@mailman.qth.net
Subject:
However, the radio hobby industry perseveres with narrow-band design
concepts even to
the present day - usually with automatically-switched front-end BPF's, the
rare exception
being the tracking preselectors in the pioneering JRC NRD-545 (1998).
Not to quibble over details but JRC's
My interpretation is that my K3 is part of the equipment at an
FCC licensed station, and is exempt from the regulation.
My 756ProIII and my IC-706 scan perfectly well on 6m right out of the box.
VE7XF
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Brian,
I have no answer on the incorrect frequency, but
CWrev is upper sideband. I guess that is the main reason CW rev is
required.
If you are going from CW normal, there would have to be twice the CW
offset figured in. That may be your 'wrong frequency' answer - the K3
compensates for the
I ran a 1B field day station in my north meadow this weekend using my 9
month old K3. I had thought that I would use my K2 instead for its lower
current consumption, since I was using batteries and a solar panel. I
couldn't give up the K3 performance and features however, so I went with
that.
Right now the cheapest and most powerful tool in most designer's arsenal is
digital signal processing and digital control systems.
Remember the old saying, When all you have is a hammer, everything begins
to look like a nail.
We humans are designed to process and analyze analog data, not
I brought my K2 to FD at local W8MRC station for the 3rd year. It
had quite an impact. The CW Ops couldn't believe the difference. I
think we may have a few more converts.
(Seems like I send this message each FD hi.)
73
John
AB8O
Hey Gang,
I read online yesterday that it may be that the K2 control PCB Rev-B
might have incorporated the side-tone audio filter somewhere in advance
of the LM380N chip, to produce a waveform closer to sine-wave.
Does anyone know if this is true?
Is there anyway of getting to look at a
It's because clicking on the spot results in (at least) two actions:
1) Set the radio frequency to 50.125
2) Set the radio mode to SSB
Unfortunately the second step invokes the CW offset adjustment, and
leaves you pitchHz off where you wanted to be.
If your software set the mode before
I emailed you scans of the board direct.
--
Mike
WE0H
K2 #6698
dw wrote:
Hey Gang,
I read online yesterday that it may be that the K2 control PCB Rev-B
might have incorporated the side-tone audio filter somewhere in advance
of the LM380N chip, to produce a waveform closer to sine-wave.
We had 3 K-3’s at our field day QTH this year. Two worked flawlessly,
however, mine; #353 developed some front panel issues. I have had no
problems with my K3 prior to this. The rig would work as usual for a
period of time then with no error messages; the front panel controls
would not
Any suggestions would be appreciated.
Sounds like the FP board may have developed a problem.
Please contact k3supp...@elecraft.com for assistance.
73,
Lyle KK7P
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I'll throw in another plug for the K2. This was my first FD in over
30 years. I ran my K2 as a 1B/Battery/QRP/CW station out of my camper
for the duration. This was the first time I'd spent quality time
with my K2 since getting my K3 almost a year ago. I'd forgotten what
a sweet little
The K3 was a hit a Field day, particularly among the CW guys. The
phone guys liked it as well.
A couple of guys here gave me a tip about temporarily changing the
KPA3 menu to allow for constant fan operation. Temps were over 100
degrees Saturday afternoon. The rig fared better than most of
Yep, same problem here with DXBase. Whenever I hit a callout and the mode is
different than where the K3 is at, the offset comes into play whether I am
going to SSB or CW. Once I am in a mode, say CW and I select another callout
everything is fine.
If I double click a callout when switching
Hello All
At 1717Z today, K2 Serial nr 6708 spoke it's first words. My thanks
to KA9S, Jeff, for answering my VERY poorly sent CQ, on what seemed to
be a dead band.
I finally got back to building again early this month and got the last
of the soldering done this weekend. Today I did the
Thanks to all who replied.
The link I was looking for was:
http://www.behringer.com/EN/Products/HA400.aspx
And now, hopefully, I'll be able to retrace my steps to finding the link to
the other op amp which is supposed to be much more robust in this type of
service.
Thanks again folks.
73,
If you have been reading the reflector for the past couple of days, the K3 we
were using got a HI RFI message on the screen. Yes, the books says that
someone is feeding the K3 more RF than it needs in the antenna terminals. The
books states 1 or 2 watts is all that it will take.
Yes, this is
Lee Buller wrote:
The K3 was on 7040 and the Orion was on 3520.
A shorted 1/4 wl stub (~46' of Vf 0.66 coax) on the Orion 80m output would
have given ~30 dB of attenuation on 40m. For best results stubs should be
tuned to exact resonance using an analyzer (most tell you how to do this).
Both K3s in our 2A effort worked flawlessly in the 105F degree humid heat of
southern Texas. We even ran RTTY and I saw the PA temp hitting 61C with no
ill effects. We used N1MM and the integrated MMTTY interface to knock out
109 RTTY contacts, 1535 CW contacts and 608 SSB contacts. With bonus
Ok,
I do see an 82mH shunt choke on the input of the 380N.
Thanks Don :)
On Mon, 29 Jun 2009 14:02 -0400, Don Wilhelm w3...@embarqmail.com
wrote:
Duane,
Those older mods have often been incorporated into the K2 design. You
will find a version of this mod already on your K2 - it was
I just wanted to say that the K2 is wonderful as a kit and as a
radio. I want to thank you all, Don Scott and Gary for your support,
Richard in Parts and the rest of the team..
You all made it fun, challenging and a learning experience.
What else have you got??
Just kidding
73 Dick AD1G
I like Bill's answer for a fixed multi-station setup. Not good enough for a
roughly controlled enviornment of FD. Or when a friend drives up to your house
running a KW mobile.
I think the bottom line is what the receiver front end was designed to handle
and how much head room there is from
I have a MkIIG with separation kit, mic, mounting brackets, cables, manual,
box, and a Heil Traveler Single side headset/mic. Would like to trade for a
K2.
Mike
AI4NS
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This K3 is 25 serial number units and 25 miles from the K3 Brad posted
about earlier. So it was pretty hot here too. Supposedly a record
temperature for the date, last set in 1952. That's one Field Day record
I didn't want to set.
I kept moving equipment around on my table to keep direct
Jim,
Is the K3 working correctly again now that you have it back home??? If so,
I would question the power setup used on Field Day. Did you happen to check
the voltages the K3 was seeing? Lots of times on Field Day power
connections are questionable. The K3 does not like low voltages,
Is there a place somewhere that provides the drawings of the Fabs so
that one can look at the schematic and then find the part w/o digging
into the boards?
Things such as this D25 issue. Once you hear about them roasting with
too much RF in then it makes a person think that it would be a good
Good evening,
While installing the KPA module in my freshly built K3, I noticed the inside
tooth washer on one of the mounting screws fastening the PA module to the
screen comes perilously close to a trace. It is the screw closest to a board
mounted trimmer, and the trace comes from a to-220
Hi Pete,
That is version C KPA3. I commented on that and sent pictures to the
support team a few weeks back.
Yes either they need to go back to the other design or just use an split
washer instead of the inside tooth washer.
I choose to keep the inside tooth washers and just push it work all
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