I had a chance to get a pretty good look at the Icom 7700 at Dayton this
year. Also, a friend of mine who has one (and also has a K3) gave me a
pretty good demo of the 7700's features. I must say, the 7700 is
impressive. Big beautiful display, and lots of very interesting bells and
whistles.
"Nyquist" in this context does not refer to the Nyquist criterion (i.e.
that the sample rate must be more than twice the highest signal
frequency). It just means a filter that has no inter-symbol
interference at a certain symbol rate (baud rate).
It turns out that if you start with completely unf
I also have both, and I concur.
Dave W7AQK
- Original Message -
From: "Tom Childers, N5GE" <[EMAIL PROTECTED]>
To: "JIM DAVIS" <[EMAIL PROTECTED]>
Cc:
Sent: Monday, May 19, 2008 7:13 PM
Subject: Re: [Elecraft] K3 noise-blanker
On Mon, 19 May 2008 13:17:48 -0700, you wrote:
Gentlem
Very interesting. That automatic Buddipole reminds me of C3PO's skinny
younger brother.
Ron AC7AC
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Monday, May 19, 2008 5:48 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Buddip
Last week I was on the list when my K-3 went belly up. The support
folks were on top of the problem right away. Kudos to them. The problem
appears to be an intermittent socket/connection between the txco and the
ref board. When pressure is applied down on the txco towards the front
shield th
Absolutely correct Julian. It is the combo of sound card and software that
does it for you, but it does a very credible job of it I might add. I know
Elecraft has thoughts of adding a bandscope of some sort, so keep the faith!
Your prayers may be answered. I just thought it was kind of intere
On Mon, 19 May 2008 13:17:48 -0700, you wrote:
>Gentlemen,
>
>I'm really interested in the K3 but what I'm asking of anyone on this
>reflector is how GOOD IS
>IT???
>I presently use a TT ORION which has a fantastic 9mhz. (hardware) blanker and
>has made all the
>difference in the world for my b
A bandscope like the Flex 5000A's would be ideal. It works great.as does
the radio, even on CW since I have no need for anything close to 50 wpm. Keep
in mind that the Flex 5000 uses it's own, high performance sound card, not a
typical PC sound card. But there are knobs and buttons on the K3
I must be confused by this filter discussion. Is not a Nyquist filter by
its very definition a digital filter? Not directly comparable to the
crystal filters in the K3 or any other rig.
I would have supposed a Nyquist filter is one that samples at least
twice per cycle at the highest observed
Hi Everyone,
I'm in the process of wiring a stereo jack onto old faithful monoral
headphones for use on the K3. (The phones are not reversible when worn).
When the sub receiver arrives, I want the main receiver in the left
channel and the sub receiver in the right channel.
For K3 use with a
A friend of mine, K8EAB, took some pictures at Dayton of the new stuff
at Buddipole.
"Several new Buddipole Products were shown for the first time
at the Dayton Hamvention ... I saw the "Automatic Buddipole" at
the QRP Vendor Night presentation, along with a compact 40-amp
super-cap power supply
If you can find one, the Clifton Laboratories Z90 or Z91 is a pretty
nice standalone unit as well.
John, N6AX
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KEVIN: If you see this, my S/N is 642, not 624. Not only did I QLF it
on the air in ECN, I remembered it all wrong as well. I think it's
called "age." :-(
ALL: Assembly went really great, no problems; follow the directions.
Lots of screws, multiple kinds of washers, and a few nuts [what wou
For me, I liked my old Heathkit (I admit I cannot recall the number,
SB-620 or something like that, but in recent memory (good enough to be
reliable) I liked the one in the IC-781, even better than the one in the
IC-7800, and would like that sort of display for the spectrum scope, but
on a nic
Got my Madelyngram stating my K3/10 kit shipped, which was ordered December
21st.
Woohoo!
Still gotta get another bag of concrete in the hole for the post for my
ZeroFive 43' vertical, and run the Davis RF Bury Flex coax (shipping
tomorrow) under my house.
--
View this message in context:
http
Good point. It seems like an adaptive equalizer should work so long as
propagation hasn't totally garbaged the signal. However, it would
greatly increase the complexity of the demodulator. But maybe not if
the equalizer assumes a simple model of the transmit filter and makes
the a priori assumpt
Hi Eric,
How are things going with the KRX3 shipments?
73,
Manuel W4SSB
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Swartz - WA6HHQ,
Elecraft
Sent: Monday, May 19, 2008 7:32 PM
To: Stan Rife
Cc: Elecraft
Subject: Re: [Elecraft] WHERE ARE THE KP
These are on hold and will not make it back into the lab until at least
the end of the year at the earliest. We're fully committed right now on
the K3 and will be so through the end of the year.
73, Eric WA6HHQ
(Back from Dayton and Tired! :-)
Stan Rife wrote:
Eric/Wayne, can you give us
Eric/Wayne, can you give us a tidbit to tide us over on this
subject. I know you guys are busy with the K3, but we would at least
like to know that the KPAs are forthcoming.
How about an update.
Stan
W5EWA
Houston, TX
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Is it a coincidence the Chinese over horizon radar has been silent on 40m the
last week?
DOUGLAS ZWIEBEL wrote:
>
> According to the scrolling banner on the CQ Magazine home page, the
> Chinese are using 7050, 7060, and 14270 for disaster communication.
> It is urged to stay clear of these fre
NAQCC Sprint Wednesday night!
This coming Wednesday evening will be the monthly NAQCC Sprint for May, 2008.
I will refer you to the proper URL:
http://www.arm-tek.net/~yoel/sprint200805.html
There you will find all the details as to time, frequencies, this month's
Special Award, which will be a
Alan Bloom wrote:
The problem is that different RTTY transmitters use different amounts of
filtering. However I suspect that a "Nyquist" receive filter designed
to compensate a typical/average transmit filter probably would have
pretty good performance on most received signals. Does anyone kn
Yes indeed we are out here. I for my part is quite happy with the K3 noise
blanker. You are not mentioning the nature of your noise. Mine is the
scratchy 120Hz noise emitted by power lines. The K3 noise blanker is quite
effective in removing it. I use a combination of the hardware and the DSP
nois
With the Flex Radio, you don't have a choice. You must use the computer or
you have no radio. Also, as good as the Flex's receiver is, it can't
transmit CW worth a hoot and probably never will. It's got a clunky, slow
and loud relay that will never be capable of satisfying us QSK types. For
SSB
Many thanks Wayne for your reply and I will ask Lisa about it as well, but there has to be others
out here
as well that have done similar comparisons!
Jim/nn6ee
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I alteady sent this, but do not see the postion... so here it is again.
I vote for a stand alone bandscope. I am tied to a computer 8 hours a
day and don't want to be tied to one in my hobby. The IC-756PRO III
stays until the K3 has one.
If we have to have a computer, might as well have a Flex R
Gentlemen,
I'm really interested in the K3 but what I'm asking of anyone on this reflector is how GOOD IS
IT???
I presently use a TT ORION which has a fantastic 9mhz. (hardware) blanker and
has made all the
difference in the world for my being able to copy weak signals, especially
since our t
Re: using Nyquist filters for RTTY.
One complication I didn't mention is the fact that, because angle
modulation (FM, FSK, PM, PSK) is fundamentally non-linear, the
pre-detection and post-detection filters are fundamentally different.
With linear modulation types (AM, on-off keying, QPSK, QAM), t
I started monitoring those frequencies last week when this was first announced.
I have heard a lot of activity but all of it is in Spanish.
Kevin. KD5ONS
-Original Message-
>From: Ron D'Eau Claire <[EMAIL PROTECTED]>
>Sent: May 19, 2008 12:00 PM
>To: 'Elecraft Reflector'
>Subject
really important to know this. I'll have to aim my rhombic the other way now
Steve Ellington
[EMAIL PROTECTED]
- Original Message -
From: "Ron D'Eau Claire" <[EMAIL PROTECTED]>
To: "'Elecraft Reflector'"
Sent: Monday, May 19, 2008 3:00 PM
Subject: RE: [Elecraft] OT: stay away from these
Yes. From the ARRL Newsletter:
"On Monday, May 12 at 0628 UTC, a magnitude 7.8 earthquake hit Sichuan,
China. The Chinese Radio Sports Association, the Chinese IARU
Member-Society, has designated the following frequencies for emergency
services involved in the rescue: 14.270, 7.050 and 7.060 MHz.
On May 19, 2008, at 11:08 AM, O. Johns wrote:
Can Lyle or someone tell me if there are plans to have the sidetone
run from 300 to 1000 by 10 Hz increments in some future firmware
version? Is there some basic reason it can't be done? I note that
page 9 of the K3 Owners Manual C1 says that th
According to the scrolling banner on the CQ Magazine home page, the
Chinese are using 7050, 7060, and 14270 for disaster communication.
It is urged to stay clear of these frequencies.
I don't know if this is accurate or not, but why take a chance? If
this was already posted here, sorry for the du
Can Lyle or someone tell me if there are plans to have the sidetone
run from 300 to 1000 by 10 Hz increments in some future firmware
version? Is there some basic reason it can't be done? I note that
page 9 of the K3 Owners Manual C1 says that the sidetone is adjustable
from 300 to 1000 Hz
Factory built ordered 16 November.
Katiegram 22 April, 1.8kHz filter and KRX3 on back order.
Arrived Samazan 10.33 this morning via Santa Cruz, San Jose, Louisville
KY, Köln (Cologne), Marseille, Bordeaux and Carbon Blanc.
Another K3 in France - and I'm a bit closer to WAUPS...
73, Pete Connors
Well, I have my LP-PAN on order and can't wait to receive it. I ordered mine
assembled so I may have to wait a couple of weeks more for it. I don't mind
being tethered to a computer while operating. Truth is I have become so
dependent on my logging program (HRD), QRZ.com, DX cluster, etc. that I
c
> Au contrare - K3's IF output is shown on the schematics to clearly be
> taken before the crystal filters.
Maybe I should have said, 'bandpass filters'? I checked before I wrote
the message and knew that the IF pickup is before the roofing filters.
...sorry for any confusion
Mark AD5SS
On M
Good or not, they were / are very popular. I've sold four
of 'em on eBay ... "spirited" bidding. All went off-shore.
73! Ken Kopp - K0PP
[EMAIL PROTECTED]
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On Mon, 19 May 2008 10:37:38 -0500, you wrote:
[snip]
>Count me in on a stand alone spectrum display, a small black box with
>a VGA connector. I don't want to be tethered to a computer though. I
>agree on the SM230/220, had them both and neither on holds a candle to
>the Icom bandscope, f
Doug Faunt N6TQS +1-510-655-8604 wrote:
Note that the KPA800/1500 was first shown with the K2, and was closely
integrated at that time.
It would work well with the K2, but it was designed to work with other
popular rigs from ICOM, Yaesu, Kenwood, etc. as well. It is not 'closely
integrated
On 19, May 2008, at 10:10, Vic K2VCO wrote:
Charles Harpole wrote:
If u would like a real bandscope with a completely real time
oscilloscope-like trace (as well as a xmas tree), get the SM-220 or
SM-230 from Kenwood. Probably no longer made, they mate with the
TS-950 and its juniors and reall
Date: Mon, 19 May 2008 08:13:09 -0700 (PDT)
From: Chris Kantarjiev K6DBG <[EMAIL PROTECTED]>
> You can always drive a linear amp with a QRP signal, but under FCC
> rules, producing more than 480 watts out with 15W in is prohibited for
> a type-accepted amplifier (15 db gain).
I must agree Vic. That Kenwood SM-2xx is a total joke. There is no way to
use it for finding signals. How one could consider it superior is beyond me.
And yes...I had one...worthless.
Steve Ellington
[EMAIL PROTECTED]
- Original Message -
From: "Vic K2VCO" <[EMAIL PROTECTED]>
To: "Elec
> You can always drive a linear amp with a QRP signal, but under FCC
> rules, producing more than 480 watts out with 15W in is prohibited for
> a type-accepted amplifier (15 db gain).
Of course! Too much blood in my caffeine stream. But if there were, say, a
convenient attenuator pad that could
Charles Harpole wrote:
If u would like a real bandscope with a completely real time
oscilloscope-like trace (as well as a xmas tree), get the SM-220 or
SM-230 from Kenwood. Probably no longer made, they mate with the
TS-950 and its juniors and really work even when u are turning the
tuning knob.
I would think it appropriate for this community to upload the K3 manuals
into some Wiki and edit them as a group, always keeping it current.
It would be better if there was a way to preserve formatting with photos
etc, so that all one would need to do is print it to have an up to date
manual. I do
I've been trying to hike my next PA AT Section, but the weather has been
wet and damp here. Looks like Thursday through Sunday will be nice
weather here in Pennsylvania so I'm planning my next hike. I only have
four more Appalachian Trail Hikes left to do and then I'll finish off
PA! So listen for
What setup is required after firmware upgrade? Say 1.88 to 1.96b.
In general, check the release notes to see what's been changed.
Controls or settings related to those functions might need to be
altered, and in any event should be verified.
In this case, MIC GAIN and VOX GAIN are probably go
Using a excessively narrow filter on RTTY is a balancing act.
If the bandwidth is too narrow the tones tend to become "smeared"
- the transitions become less easy to detect (in other words,
the "eye" begins to close). However, narrowing the bandwidth
also reduces the amount of QRM/QRN making
What setup is required after firmware upgrade? Say 1.88 to 1.96b.
Should we do the Low and High TX Gain Calibration?
What else?
Joe N9VX
K3 #841
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AD5SS penned "it is a 2nd receiver for any signal that is available to
it from the K3's IF. That means only signals that make it through the
passband filter."
Au contrare - K3's IF output is shown on the schematics to clearly be
taken before the crystal filters.
73,
Barry N1EU
___
After experiencing a few RTTY QSO's over the weekend (yes - I was on RTTY) I
think I'm in need of the 1500 watt beauty as a matter of extreme urgency!
I saw it in the flesh in 2005 and have been drooling over the keyboards ever
since.
Simon Brown, HB9DRV
-
A really really good bandscope can be had through using the SDR-IQ from
RFSpace connected to the IF output of the K3. It can also record 180kHz
worth of the band. Non-computer based methods are also possible, but the
computer realisation is so much more versatile. The SDR-IQ software can
interface
>>"Additionally, it really constitutes a 2nd receiver, which l sorts of
>>possibilities.
... well ... it is a 2nd receiver for any signal that is available to
it from the K3's IF. That means only signals that make it through the
passband filter.
Mark AD5SS
On Sun, May 18, 2008 at 5:56 PM,
What I am in the process of doing is putting together the Softrock receiver,
and lashing it up to a micro ITX formfactor
PC. They are very small, and have the ability to use a 12V DC power input.
Do a search on car computers, and there is a ton of stuff there.
Mate it with an old LCD monitor that i
Mike,
While my pride as a builder says, "No way!" you are probably right
and I'll probably have to rebuild that board. To paraphrase a quote: "We
hates it Mr. Baggins..."
Regards,
kurtt
Kurt Pawlikowski, AKA WB9FMC
The Pinrod Corporation
[EMAIL PROTECTED]
(773) 284-9500
If u would like a real bandscope with a completely real time oscilloscope-like
trace (as well as a xmas tree), get the SM-220 or SM-230 from Kenwood.
Probably no longer made, they mate with the TS-950 and its juniors and really
work even when u are turning the tuning knob. Likely Kenwood love
hi Bill,
I have tried a Plantronics Computer Headset in the past with my K2.
I made an adapter like you did but with the internal 5V bias.
Audio reports were worse than with the dynamic Kenwood microphone I
used before.
I tried this special microphone because G4ILO recommended it on his
homep
David Yarnes wrote:
>
> Hi All,
>
> Something that I saw at Dayton may be of interest to Elecraft
> owners--particularly K3, and possibly K2 folks. Jay Bromley and I visited
> with Larry Phipps at his booth for a while. Larry has several very
> innovative items that he sells, including probab
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