Great news about the K144XV!
I just wonder if the K144XV has the possibility to separate the RX input
and TX output and become available at the back panel?
(A lot of VHF Dx-ers use only 1 relay, the one in top of the tower, where
the preamp is installed as well.)
73's, Evert PA2KW
Good job, Drew! I repeated your steps and confirm the same result:
40m is mapped out. Now that it's repeatable it can be fixed. (BTW,
I'm running FW 3.11)
Same here on FW 3.14
73,
Gary ZL2iFB
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Home:
The connector is referred to on page 17 of the latest K3 Owner's Manual
and my K3 rear panel is labelled REF.
In consequence, I have bought a Racal-Dana 9474 Rubidium Frequency
Standard which is now poised to plug in as soon as the KREF3-EXT is
available, hopefully quite soon.
73
David
In a
On Fri, 15 May 2009 09:14:50 -0700 (PDT), Hisashi T Fujinaka wrote:
Well, you're all ignoring the longevity reduction with heat.
I'm certainly not, and I doubt that the designers of the radio have
either. K6XX, an engineer who has looked carefully at the design,
considers it very well
Hi
Talking about rubidium standards.
Does anyone have any experience with buying and using the EFRATOM LPRO-101
rubidium standard that seems to be readily available from the many Chinese
sellers on Ebay?
I am tossing up between the LPRO rubidium and the Thunderbolt GPS standard.
The
In a recent message, Craig vk...@yahoo.com wrote ...
I am tossing up between the LPRO rubidium and the Thunderbolt GPS
standard. The Thunderbolt makes a lot of sense since it does not
depend on a tube that can wear out or go out of lock.
True, but it does assume that the GPS satellites
charging state tax, totally bogus IMHO, Hendricks was doing the same
thing, must be a california thing.
Matt
W8ESE
Former KD8DAO
http://blog.MattIsKichigai.com
On Fri, May 15, 2009 at 8:01 PM, David Wilburn dave.wilb...@verizon.net wrote:
http://n2.nabble.com/K3-or-SDR-5000--td457400.html
From: K2ZLS k2...@optonline.net
The other driving factor here, that NOBODY seems to take
seriously, is the heating effect on the computer chips and DSP
processor. They could use heat sinks, but space limitations may be a
problem. My background is computers and I know that HEAT is their
I guess I'm missing the reason for having such precision. How can it make sense
to have a precision standard for a receiver that changes the tuned frequency
when the DSP bandwidth is changed?
Wes N7WS
--- On Sat, 5/16/09, Craig vk...@yahoo.com wrote:
From: Craig vk...@yahoo.com
Subject:
The frequency is 3630 KHz plus or minus the QRM.
The new start time is 0900 hours local (0800 UTC) in an effort
to try and beat the deteriorating summer band conditions.
73 Dave, G4AON
K3/100, Acom 1000, dipole
__
I wonder if there is a way of using a cheap 60kHz radio controlled clock
receiver to phase lock an 'ordinary' 10MHz crystal osc.
David
G3UNA
-
In a recent message, Craig vk...@yahoo.com wrote ...
I am tossing up between the LPRO rubidium and the Thunderbolt GPS
standard. The
Any news from Dayton about the long awaited amps 800/1500?
I'm pleased to hear about the K144XV though, just what I need.
73
Roger MW0IDX
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Help:
Recent discussion regarding verticals, internal antenna tuners and
remote antenna tuners was very interesting. Based on that discussion,
it seemed the optimized solution was a vertical, with good radials,
and a remote tuner at the base (generalization). Based on a quick
check of remote tuner
Hi,
I am wondering if the K3's firmware has implemented the 0.5 ppm when
using the KTCXO3-1 1ppm High Stability Reference Oscillator?
N3ZH - Howard
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Help:
I think you have arrived at a good understanding of the benefits/limitations of
both the StepIR and the remote tuner approaches. I use the remote tuner
approach, but would think that the StepIR should give similar results. And, as
you point out, the total costs of the two approaches are
If you are talking about multi-band operation, you can expect the SWR to
range up to above 60:1 on some bands, particularly where the radiator is
near 1/2 wavelength. That's why ATU's designed for operation at the antenna
are used for such applications. And, yes, they tend to be expensive.
The
I am also curious of the experience of the group with the SteppIR
verticals. There is similar up front cost as the vertical / remote
tuner solution (assuming a new weather proof tuner).
Hi Dave:
Sometimes it's hard to tell this Yahoo Group from the SteppIR Yahoo Group.
There are so many of
I worked for a Maryland retailer at the Hamvention in the past and
opinion has nothing to do with it. If you don't get an Ohio merchant's
tax license and collect the tax they [the government] will prosecute you.
Matt Palmer wrote:
charging state tax, totally bogus IMHO, Hendricks was doing the
On May 16, 2009, at 11:26 AM, Craig Smith wrote:
I think you have arrived at a good understanding of the benefits/
limitations of both the StepIR and the remote tuner approaches. I
use the remote tuner approach, but would think that the StepIR
should give similar results.
Bear in mind
David, whether a vertical is the best antenna or not depends on where you are
and what you are trying to achieve. Some things to consider are:
1. Verticals are generally more subject to man made noise than horizontal
antennas.
2 When putting down radials the first radial is most important.
Dave, you could do a whole lot worse than read about radial lengths at:
http://www.antennasbyn6lf.com/
Look about halfway down the page at the various pdf documents describing his
experiments and measurements.
73 Dave, G4AON
K3/100 and fishing pole vertical against 16 radials on 40m
How does the antenna interface to the rig(s)? I have not looked at
what is going on with the control box, need to understand that better.
If it connects to the rig via the serial port, not sure how the rig
would then be used by control program or for contesting.
Thanks
Dave Wilburn
NM4M
David,
W.r.t. radials you may want to study the findings of Rudy Severns, N6LF at
www.antennasbyn6lf.com. His findings have also been published in QEX (spread
over several recent issues). Some of his findings in simplified bullet form:
A number of 1/8 wave radials will be better than half that
Good stuff as always Ron, thanks. The multiple wires on the
fiberglass is a VERY interesting idea.
Plus if I add sections, 43'ish is 5/8 on 20m, the main ban I operate
on. I am mainly interested in 40' and up. I'll get 80 and 160 with
other wires.
Thanks for taking the time to reply Ron.
On 2009-05-14, at 14:26 , Terry Dunlap wrote:
I must be missing something here. For the life of my I can't figure
why
you would want to be changing frequency while transmitting CW (or any
other mode)
I'm the author of the post that Bill (W4ZV) quoted. My experiments
with the PowerMate
The motor unit has a stepper motor and a roll of beryllium-copper tape with
evenly spaced holes (about 0.75 in apart). A sprocket runs the tape in and out
in response to pulses from a computer in the shack. The computer keeps track
of the tape position and the tape runs up a fiber-glass tube
In a recent message, Jerry T. Dowell a...@sbcglobal.net wrote ...
Do not hold your breath waiting for it. The last time I talked to Wayne and
Eric about it, they said that it is not a high priority with them and that
they are not likely to do it soon because very few users are interested in
One way to accomplish that at a lower price than a commercial ATU at the
antenna is to put in a matching network for each band, relay switched, at
the base.
I use a 43-foot vertical for 160-20 meters. The higher radiation resistance
(compared to other verticals) helps with antenna efficiency
Oh yea, been there. Thats some good stuff. I have been going back
and forth between that, some really good info that SteppIR provides on
radials, ON4UN's book, and the ARRL antenna book. The two books laid
the foundation, but N6LF's page, and the info from SteppIR really tied
the pieces
That's a really bad comparison. A good safety ground has no
relationship whatsoever to a good radial field. They perform different
functions, and while a good radial field might also provide some safety
benefits as a distributed path for lightning protection, the reverse is
rarely true.
Yes that is a good page. I had considered elevating the vertical, but
with the fiberglass mast I would need to get several more sections,
and then wasn't that crazy about the elevated wires over the back
yard. If I recall, he wanted a pair of resonant wires for each band
for the elevated
Dave, I agree. The reason I tried the safety ground was that it was there.
The reason I mentioned it here was as an example of what not to do. BTW I
later ran the inverted L with just one of the elevated radials with
excellent results. There is definitely a point at which a ground radial
I recall that either Rudy or someone else has shown that a gullwing
arrangement where the elevated radial has a sloping section that goes down
to a ground-level feedpoint works well, so you wouldn't have add to the mast
in order to use it. AFAIK the main drawback with a single elevated radial
-Original Message-
6. Don't use a half wavelength at your desired frequency because it is very
difficult to match an antenna with nearly infinite reactivity. You can put
a coil in series to make it about 0.75 wavelength so you can match it, but
it will not be easy.
Thanks. I get that. How does it interface to the K3? How does it
know it should change bands when you change the rig? I'm thinking
back now, and recall some posts about a splitter cable. I'll hit nabble.
Thanks
Dave Wilburn
NM4M
WILLIS COOKE wrote:
The motor unit has a stepper motor and
Hmmm. I wonder if the new KXV3A will gain or lose any capabilities
(besides compatibility with the new 2m module.) And will it differ in
price compared to the current KXV3?
I've been considering getting a KXV3, and I'm not especially
interested in the new 2m module, so I'm trying to
If I were you, I'd wait. You can almost certainly get a KXV3 for free
soon.
73, doug
From: Joe Planisky jp...@jeffnet.org
Date: Sat, 16 May 2009 14:28:14 -0700
Hmmm. I wonder if the new KXV3A will gain or lose any capabilities
(besides compatibility with the new 2m module.) And
John,
Are you certain you have actually lost 3 dB of sensitivity. Looking at
the S-meter response at the S-9 level does *not* necessarily indicate a
loss in sensitivity.
Make an MDS measurement to see if that indicates a sensitivity loss
(that will be a valid measurement). If the MDS is ok,
On Sat, 16 May 2009, Jim Brown wrote:
On Fri, 15 May 2009 09:14:50 -0700 (PDT), Hisashi T Fujinaka wrote:
Well, you're all ignoring the longevity reduction with heat.
I'm certainly not, and I doubt that the designers of the radio have
either. K6XX, an engineer who has looked carefully at
Thanks. I get that. How does it interface to the K3? How does it
know it should change bands when you change the rig? I'm thinking
back now, and recall some posts about a splitter cable. I'll hit nabble.
Hi Dave:
You can order the SteppIR controller with an optional interface board that
I have operated Field Day with my K2 in the QRP mode and one normal car
battery. No problem.
I made 460 contacts so calling stations and giving the exchange maybe took 20
seconds. THat means the transmitter was on only on for perhaps 20 seconds per
QSO or 8 minutes per hour. Hardly seems
Creative snipping, I'm going to do it too.
I was talking about 80-year old radios, and keeping the radio running
for that long. You're talking about 10, maybe?
Maybe not creative. Maybe factual?
I have a 56 year old Collins 75A3. And a Johnson Ranger and Viking Courier
just slightly
Joe,
Sorry, but I have no insight into that question. Eric did say that only the
A will be available in the future. I am not sure if there will be price
increase for the new one or if the $40 is the price if bundled with the 2M
option. Guess we will find out early this coming week.
Ed,
Hi gang,
The weekly Elecraft SSB net will meet tomorrow (Sunday, 5/17/09) at 1800Z.
We will start at 14.316 MHz, and QSY if needed. The net control is in
western Oregon, but we will need a good east coast or midwest station to
relay a few west coast signals that may be too close to net control.
My question is, Under these circumstances, can I expect the battery to
last for the more or less 18 hours that I will be operating?
Obviosuly, if not, buying a second battery is a not-very-expensive option.
Randy W6SJ
The Amp Hour rating tells you how much amperage is available when
On Sat, 16 May 2009 15:03:07 -0700 (PDT), Hisashi T Fujinaka wrote:
Also, you said you had several K3's. You're in a whole different
league
I'm not sure what that means. I'm a working stiff, but semi-retired.
I'm a contester, so I have two K3s, one with a second RX, so I can
do SO2R. I sold
Hmmm. I wonder if the new KXV3A will gain or lose any capabilities
(besides compatibility with the new 2m module.)
The KXV3A adds the capability to support internal band modeuls for the K3,
such as the new 2 meter module introduced this week.
No capabilities of the KXV3 are lost.
73,
Just doing the math...I would assume that you would draw aprox 20 amps at
100 watts..
you would not be at 100% duty cycle so that would help.
I don't think that your rig would work very well when the battery dropped
down to 10.5 volts
what I would think would be useable would be a battery with a
You are absolutely right Ron. It is possible to end feed a half wavelength
antenna. All it takes is very big coils and very high voltage capacitors and a
lot of knowledge and usually a lot of money. Not quite so bad if you stay with
QRP power levels. And when you are through you have an
I have bought items from fluke.l on eBay who sells them. He sells the
GPS-DO, the Efratom device, adn the one I bought which is an FE-5860A
Rubidium frequency standard from him and hooked it up last night. I've
found fluke.l to be responsive and honest, and he ships quickly. (If you
are in a
Awesome stuff. Thanks much, just what I was trying to find out.
Maybe I have already heard the antenna, when I worked you last
November. Guess it depends on what antenna you use on 80m. ;)
73
Dave Wilburn
NM4M
K2MK wrote:
Thanks. I get that. How does it interface to the K3? How does it
Willis and others:
There is a much cheaper trick than big coils and capacitors that ought
to work, and could easily handle high power.
Although I have never tried end feeding a half wave antenna, I have had
great success in center feeding full wave antennas. The trick is to use
an open wire
About 1000 of the knobs were maufactured improperly, which has since been
corrected. Eric told me at Dayton that future knobs will have a glass
additive in them so that they will be virtually indestructible.
Email parts at Elecraft and they will promptly send replacements.
73,
Lou, W0FK
Steve,
Since your simulation showed that the feedpoint had a reactive (-J)
component, it was not resonant half wave dipole. You should adjust the
antenna length to bring the +/- j component of the impedance to zero.
That is the condition of resonance for antennas.
You other points were
Yes, but if your rig is at one end of the best antenna run, and if you want
to direct feed your antenna to avoid feeder loss, end feed can be great.
That's my situation here. I have an Inverted L about 130 feet long fed by a
tuner directly above the rig that lets me work all bands easily.
With
Absolutely. There's really only *one* Zepp antenna. It is a 1/2 wave
radiator fed at the end with 1/4 wave of open wire line. Used on Zeppelins
as a trailing wire antenna.
The problem with it is, if you want a low impedance at the rig end of the
open wire line, is that it's only good at ONE
The funny thing is that an amp *was* developed, shown at Visalia, and
announced on this list:
http://www.mail-archive.com/elecraft@mailman.qth.net/msg21610.html
The*Full Break-In Silent Diode T/R* feature listed was very
appealing to me. However, your conclusion may well be correct.
Bob NW8L
I found myself working PSK on the main receiver on 20 and listening to a QSO on
40 on the subreceiver where there was a carrier off and on for quite some
period of time. I tried to turn on auto notch on the subreceiver and could
not. Posted here - the answer I received was that it is not a
I don't see 10 watts as a problem. How many 2 meter amps do you have on the
shelf just waiting to be used again? 40 w 15 years old ($90 new then), two
converted police amps (ugly but they work well) both run over 85 watts
continuous with 5 watts in ($50) at hamfests if there any still around)
Good Evening,
It must be nearing summer because I just spent fifteen minutes shooing the
first bat of the season out the front door. For the next few weeks I will see
them flying around inside at dusk. I have a better idea of their point of
entry but I need the time to block it. Oh well,
That's about what I expected. I've been trying to figure out why some
folks seem so keen on an Elecraft amplifier ... it just didn't make a
lot of sense to me. Given the already available amps out there from
reputable manufacturers (Acom, THP, etc), I'd be surprised if Elecraft
would be
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