Folks - back on the 28th of Feb I started this thread, looking for assistance
getting the K2AV Folded CounterPoise (FCP) to work on my 80 meter Inverted L
antenna. Got several good suggestions and wound up having a long series of
off-line email exchanges with Guy, K2AV. With his help, we got
Reading messages from Wayne and Eric about the KX3 development, and
knowing all the other projects they have going on in parallel, I am
fascinated by the organization it must take to get this done in a small
and nimble company. Has there been anything written about how Elecraft
manages
With the new ability to use PSK31 on the 60m channels, I am uncertain about how
to get on the proper frequency. FCC only allows operation on precisely the
center of the channel (e.g. 5405.0).
As best as I can tell, for 1500 Hz audio, the K3 should be set for the CW
frequency +0.625 kHz in
Is it possible 1N34A diode to be used for detecting GSM waves?
I want to make GSM stick which flashes when GSM transmit like that:
http://www.youtube.com/v/CNJVhzOjWgU
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I didn't notice if you said that you're running Windows or something else.
I'll assume you're on Windows.
I had trouble using fldigi/rigcat with the K2, but the associated flrig
program works fine (also downloadable from the w1hkj site, the same place
you get fldigi). flrig and fldigi work
Your calculations appear to be based on using AFSK A - REV (USB) with a
Pitch setting of 2125 Hz. The probability of error is very high using
such a difficult choice. Use DATA A instead; it's much simpler. I can
see no reason to use AFSK A (normal or reverse) in this situation unless
you
Hi Ron,
In all the remote stations that I have been involved with, this has been
the most complex issue to solve. However, I will give you a short
summary of various methods that can be used.
There are three general methods:
1) Antenna switches controlled remotely
2) Relays used to control
On Thu, Mar 8, 2012 at 2:19 AM, Jim Bennett w6...@mac.com wrote:
... the MFJ-259B does NOT show minus reactance
===
Gee whiz! That's pretty lame. As my favorite soccer announcer says
when a guy misses from short range, Me pongo las manos en la cabeza.
Tony KT0NY
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On Wed, Mar 7, 2012 at 10:20 PM, Wayne Burdick n...@elecraft.com wrote:
...This is a substantial departure from other SDRs.
Yep, for sure. And the biggest departure from the typical ham SDR is
the fact that the computer is inside the radio box. There are various
commercial and
Hello Jim,
Unfortunately I do not know offhand of a source of small PCBs which would
suit your need, but some years ago when fiddling with my K2/100 and adding
some surface-mount devices, I wound up having to make some small daughter
boards.
The type of PCB from which I cut these small boards
On 12-03-04 06:33 PM, Wayne Burdick wrote:
A preliminary version of the KX3 Owner's Manual can now be downloaded
at:
http://www.elecraft.com/K2_Manual_Download_Page.htm#KX3
Thanks, Wayne. When I first saw pictures of the KX3 I couldn't see the 7, 8,
or 9 buttons. I have found them in
The knobs have integral pushbuttons
73,
Wayne
N6KR
On Mar 8, 2012, at 7:57 AM, Kevin Cozens wrote:
On 12-03-04 06:33 PM, Wayne Burdick wrote:
A preliminary version of the KX3 Owner's Manual can now be downloaded
at:
http://www.elecraft.com/K2_Manual_Download_Page.htm#KX3
Thanks,
Now listed to begin shipping on 3/9.
Lou, W0FK
Ian Kahn - Ham wrote
Eric/Wayne,
The Shipping Status page of the Elecraft web site still shows a P3SVGA
ship
date of this past Monday. Obviously, they didn't ship then. Will the web
site be updated with a new estimated ship date? If
I think the original statement was incorrect. The MFJ-259B does show
reactance, both positive and negative, but it does not show polarity, so you
have to experiment a little or add some knowledge to find out the polarity of
the reactance. That is one of the reasons that the MFJ-259B is not
Congratulations Jim! I have been watching this thread with interest to see how
it worked out. I would like to know a bit more. Is your feed point at the
same elevation as your counterpoise, or at ground level? If at ground level,
describe your transition to five feet for the counterpoise.
I stand corrected. I should have said that it simply shows numbers and it is up
to the user to figure out the correct polarity. Thanks for the input.
I think the original statement was incorrect. The MFJ-259B does show
reactance, both positive and negative, but it does not show polarity, so
WANTED Elecraft KXB3080 KIT, unbuilt, or partially built. w7...@gbis.com
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This
I wouldn't have mentioned it Jim, except Tony's funny comment muddied the water
some. I like humor, but I also don't want anyone to be confused by humorous
dialog. I am sure Tony knows how the analyzer works. In your case, there were
enough confusing factors to leave some doubt about the
The feed point is at exactly the same elevation as the FCP - just around five
feet off the ground. The FCP should have been eight feet high, but that would
put it in the neighbor's cross-hairs and we live in a CCR / HOA area, so
stealth is best for me. The isolation transformer unit is loosely
Great work!
I just finished #7261 . Im trying to decide whether to get a K3 next or
build a K2/SSB/100w
73
Don
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I've been using a Power Sonic PS-1229 2.9 Ah SLA. It gives me plenty of
power for an afternoon of operating the K1 in a normal rag chew mode.
The PS-1229 is a convenient shape: 7 x 1.3 x 2.5 inches and weighs about
half again more than the K1. I bought mine used at a swap meet for a
few
The advantage of using a PC for the SDR engine is massive economy of
scale, which drives prices down. The processor in a modern PC is many
times more powerful than the processors in a ham transceiver. On the
other hand, it has to do a lot more to support the bloated operating
system, which, as
Alan Bloom wrote:
Of course it would also draw as much power as a whole K3 - don't even
talk about a KX3. But that wouldn't be a problem as long as you
plan to
always use it with a line-operated power supply.
Except that some of us prefer to minimize energy use at all times, not
just
On Thu, Mar 8, 2012 at 10:54 AM, WILLIS COOKE wrco...@yahoo.com wrote:
I wouldn't have mentioned it Jim, except Tony's funny comment muddied the
water...
===
Yeah, there's always some smart-aleck to confuse the issue. But
seriously, I don't see why MFJ couldn't put a minus sign or
One should also remember that the K3 is ALSO a SDR. The 15-KHz
second IF is a SDR, so the KX3 is a beneficiary of the design lessons
learned in making the K3. I suspect technology for a good zero IF
SDR was not as available when the K3 design was done (and I'm sure
some other design
The basic bridge in the MFJ - and lots of other impedance analyzers - is
insensitive to the sign of the reactive impedance. You can figure it out by
making a small change in frequency and seeing whether the reactance
increases or decreases. However, this takes additional software in the uP,
On Thu, Mar 8, 2012 at 11:52 AM, Alan Bloom n...@sonic.net wrote:
...That's what I did in the P3. A single inexpensive,
low-power, 40 MIPS processor does all the user interface, hardware
control and digital signal processing, yet it achieves excellent
real-time performance.
Just think if
Tony,
There is more to it than just putting a + or - sign on the display. The
instrument must have adequate measurements starting at the front end
reflectometer to determine the sign of the reactance. The MFJ does not
have that.
If there were a microprocessor in the instrument, and it had
I think you will find the original designer was Tom Rauch W8JI.
73,
Don W3FPR
On 3/8/2012 2:15 PM, Ian Wilson wrote:
So I think that the original designer made a reasonable tradeoff. I wonder
who that was - the design was purchased by MFJ from Vectronics, I think).
Rich,
Thank you very much!I've only had the K3 for a couple of months and I'm
still learning! That was an area I had totally missed!
73, Ken
WA8JXM
On Mar 8, 2012, at 9:10 AM, Richard Ferch wrote:
Your calculations appear to be based on using AFSK A - REV (USB) with a
Pitch setting of
Well stated points. SDR is incorporated increasingly into commercial
radio products where I think the norm is an internal processor. Not
being a computer geek, just a moderately knowledgeable user, I wonder
if some kind of partitioning of a generic computer used for SDR could
solve many of
For the benefit to others like myself, this is a follow-up to the post below.
I have been re-using an adapter made for another radioheadset-mic with my
CM-500 mic. What I didn't know is that there was a 22k resistor in the adapter
that bridged the 8V to the tip and ring which were wired
I've noticed that one can still buy on line the tubes used in my first regen
- type 76 triodes from the early 1930's - for what are probably cheaper
prices after adjusting for inflation than I paid for them in the 1940's.
And, of course, 40673s (with leads) are still available for under $6.
Or
Hello!
Well, I wanted to provide as much advance time as I could so you could mark
your
calendars and/or get everything in your 6m station optimized by the end of
August ;-)
As those of you know who completed JT65A mode contacts with me on 6m EME when
I was
in E51, 3D2 and 5W, I will do
As for the CM-500, I'd like to know if it is the tip, or ring, on the
1/8 inch plug that is the actual mic audio lead. I will have to try
one, or the other, to see.
The answer is quite simple ... the tip and ring of the CM-500 mic plug
are connected together.
The supplied battery box has no
Gary,
My L wire started out from the formula L (ft) = 234 / f (mHz). Wasn't quite
long enough and wound up adding a couple feet to it. But first, we had to get
to a zero reactance spot, and that meant (for my installation) adding two feet
to the total wire length of the FCP, as compared to
On Thu, 8 Mar 2012, Tony Estep wrote:
On Thu, Mar 8, 2012 at 10:54 AM, WILLIS COOKE wrco...@yahoo.com wrote:
I wouldn't have mentioned it Jim, except Tony's funny comment muddied the
water...
===
Yeah, there's always some smart-aleck to confuse the issue. But
seriously, I don't see
Wayne,
Could you quote the manufacturer and model for this green charger?
Tnx es 73,
Oliver Johns
W6ODJ
On Mar 8, 2012, at 10:16 AM, Wayne Burdick wrote:
t's double-bottom-line engineering. Fortunately we're not the only
ones doing it. I recently bought a new green charge adapter for
Nick-WA5BDU mentioned putting CW freqs in VFO A and SSB freqs in VFO B
using Dick's K3 Frequency Memory Editor. I had done that, but didn't
realize that a * at the head of the name allows me to tune the band,
channel hopping with The Big Knob. It just cycles through the channels.
http://go2wireless.com/index.php?route=product/productproduct_id=6156
Wayne
On Mar 8, 2012, at 1:55 PM, Oliver Johns wrote:
Wayne,
Could you quote the manufacturer and model for this green charger?
Tnx es 73,
Oliver Johns
W6ODJ
On Mar 8, 2012, at 10:16 AM, Wayne Burdick wrote:
t's
On Thu, 2012-03-08 at 13:19 -0600, Tony Estep wrote:
...
Maybe not with a power-sucking Pentium chip, but an ARM or
similar might be just the thing.
The power consumption of most CMOS chips tends to be directly
proportional to the clock rate. By reducing the Pentium's clock rate
from a few GHz
Sowhat the heck has happened to the KAT500?
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We revised the PCB one more time to make it easier to manufacture.
Should have these final (we hope) boards in by next week. If all
goes well, we'll be down to one final impediment: me. I have to revise
the sheet metal drawings.
Sorry for the delay.
Wayne
On Mar 8, 2012, at 2:48 PM, Fred
Patience is a virtue!
I recall on a long plane trip between North Carolina and California, the
XYL was getting restless from being in the same cramped plane seat for
so many hours - I finally wrote patience in very small letters on a
small piece of paper and handed it to her with the words now
Hello everybody.
I am happy to tell you the birth of the K3 number 6265.
This evening, I tried to use it with an old amplifier FL2100Z.
It did not work and I found on internet that I have to use interface.
So, if one of you have the schematic diagram of this interface, I will be very
happy.
On Thu, 8 Mar 2012, Alan Bloom wrote:
That's what I did in the P3. A single inexpensive, low-power, 40 MIPS
processor does all [...] Just think if you did the same thing with a 3
GHz, quad-core Pentium processor! The possibilities are mind-boggling.
ROFL! Yes! The amount of CPU
Have you any idea of pricing? And will it be kit or assembled?
And thanks for the infothis IS me being patient. With my
antennas I can use the KPA500 on small bits of only three bands!
73
-Original Message-
From: Wayne Burdick
Dick -
Avoid all the adapter cruft and plug the headset into the rear panel. Nothing
hanging
off the front panel to snag stuff. Set Menu|Mic Sel to rP.h, and turn the bias
on.
73, Mike NF4L
On 3/8/2012 3:16 PM, Richard Fjeld wrote:
For the benefit to others like myself, this is a follow-up
On 03/08/2012 06:04 PM, Jessie Oberreuter wrote:
On Thu, 8 Mar 2012, Alan Bloom wrote:
That's what I did in the P3. A single inexpensive, low-power, 40 MIPS
processor does all [...] Just think if you did the same thing with a 3
GHz, quad-core Pentium processor! The possibilities are
How long was your hospitalization?
73, Mike NF4L
On 3/8/2012 6:01 PM, Don Wilhelm wrote:
Patience is a virtue!
I recall on a long plane trip between North Carolina and California, the
XYL was getting restless from being in the same cramped plane seat for
so many hours - I finally wrote
Hi Fred,
Adding the * in the label is kind of cool. But the VFO dial is really
sensitive. Just the slightest touch causes it to jump to the next channel or
it might even jump two or three channels. The firmware should probably be
changed to require 5 or 10 degrees of rotation before changing
Wayne,
I, for one, would rather wait and know I am getting the best that Elecraft
can offer; design, component, price wise.
I've seen too many jobs/products rushed into to meet the market demand, only
to have problems down the road and end up doing a re-design.
73 de Jim - KE8G
-Original
Thanks Wayne. Information is therapeutic. Helps to relieve anxiety. We are
a fragile lot.
73 Joe K2UF
No trees were harmed in the sending of this e-mail; however, many electrons
were inconvenienced.
-Original Message-
From: elecraft-boun...@mailman.qth.net
Don't let the KAT500 cut into your on-air time!
On Mar 8, 2012, at 3:00 PM, Wayne Burdick wrote:
We revised the PCB one more time to make it easier to manufacture.
Should have these final (we hope) boards in by next week. If all
goes well, we'll be down to one final impediment: me. I
Phil Hystad wrote:
Don't let the KAT500 cut into your on-air time!
Don't worry. I'm averaging a blistering one QSO per day right now.
A couple of days ago I worked ZS1JX on 7.001 using the KX3. I was
running 12 watts to a random wire antenna just a few feet off the
roof, but we had a
in the last few days I've been evaluating a couple of low cost audio to
USB interfaces for use primarily with digital modes -- RTTY, PSK, JT65,
FSK441. My primary objective is to improve decode performance at low
signal levels. I studied the catalogs and chose two low cost units that
looked
For those who do not understand the technicalities, I would suggest that
the CM-500 cannot be plugged directly into the KX3 jack. The KX3 PTT is
on the ring connection, and the stock CM-500 connects the Tip and ring
together for the AF connection.
It MAY work, but it is not a certainty, the
If hiking is your issue, you might want to consider a LiPO battery like
ones used by model helecopter inthusiasts. I've been using a 950 mAH
Blue LiPO for several months, once a week for a 1-1.5 hour morse code
practice. I've been expecting it to run dry, but I have not recharged
it yet. I
Pretty good catch on 12 watts. I just checked my log book, no entries for
yesterday and the day before. Been busy so I am going to go find someone on 40
meters -- maybe around 7.030 or so.
phil, K7PEH
On Mar 8, 2012, at 5:55 PM, Wayne Burdick wrote:
Phil Hystad wrote:
Don't let the
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