For those who are eager to build something while waiting for the courier
to bring your K3, you might like to try a simple spectrum analyser. In
the best traditions of amateur radio this can be built in a few minutes
using parts from your junk box. All that is required is a computer with
sound
Paul Pollock wrote:
2). A pad buffer (at the output of the dummy load) to be used to filter
out/reduce the transmitter RF, and detect/output the audio. This is used
as the input to a computer soundcard (for use with Spectrogram or other
spectrum analyzer)) for transmitter bandwidth/BFO
Ian,
I find that 700 degrees F is good for most of your pc board work. You mithe run
it down to 600 degrees F for delicate components or plastic connectors.
800 degrees F is good for older tube equipment, terminal lugs, and power cables
or coax (I always solder my Anderson Power Pole connector
Chris,
I am pleased to learn that you have had success with the diode
replacement. They are a bit difficult to reach, and there is no reason
they cannot be placed on the bottom of the board as you have done.
Do correct the power supply situation before drawing any further
conclusions about
Dave,
Yes, such a 'block converter' (mixer) to convert the transmitted output
to baseband is a great tool.
If I may, let me add some alternatives. Some Elecraft builders already
have some of the pieces required for this Spectrum Analyzer and may not
realize it.
The spectral display can be
As it might be immediately obvious, you can use non-USB PC microphones
with the K2 by using a straight through microphone jumper block and a
stereo line socket with pin 1 on the microphone connector connected to
the tip connection, pin 8 connected to the barrel and pin 6 connected to
the ring,
Don
I've added a diagram!
Thanks for your thoughts. I would prefer a real two tone test oscillator
to the one from the sound card...
73 Dave G4AON
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the
Mike,
The first thing that usually comes up is the standard answer of
making sure all the solder joints are solid. Sometimes, just reheating
them will make the difference. It's possible that you do have some sort
of component failure, but I wouldn't expect it to be intermittent. That
is,
The answer is in how fast the solder flows on the joint. With most good
irons and tips appropriate to the size of the solder joint, 700F to 750F is
typical.
Once you put the iron to the joint, solder should flow freely in about 3
seconds, not much longer. Dwell times (time the iron is on the
Hello David,
Chuck Penson's excellent book, HEATHKIT: A GUIDE TO THE AMATEUR RADIO
PRODUCTS, 2nd Ed., lists both the HR-1680 and the HX-1681. According to
Chuck, the HR-1680 was released in the Fall of 1967, but the HX-1681, which
initially was advertised as coming soon, was plagued with
Folks:
This is a response to a message posted on the N1MM Logger reflector,
but since it's
K3-related, I'm posting to Elecraft as well...
At 07:30 10/06/2007, lu_w4lt wrote:
Anyone using an Elecraft K3 with the software?
Any issues or praise?
I am considering a station upgrade.
Thanks in
Fellow K3 droolers
Seems that every time I post a friendly reminder (actually more like
when my anxiousness becomes extreme) about the weekly communication
promised by the Aptos crew, I get a bunch of private emails (and some
not private) giving me the last shipping update as posted on the
I would like to hear from my fellow Elecraft fans regarding general
impressions of the K3 versus the SDR 5000A, software defined radio.
Just as in the Elecraft reflector, FlexRadio has some very stout
supporters. I hope this topic is not inappropriate. Just interesting.
John
AB8O
Hi John,
Although I do not have a 5000, I do have a SDR-1000. Elecraft and Flex
are both Good companies that produce great radios. However, I believe
one major difference between the K3 and the Flex 5000 will be in wider
space dynamic range. The close-in 2Khz dynamic range for the 5000 I
Mike,
In addition to checking soldering joints, double check carefully components on
the board with the manual. Yeah, I know, it's a pain but the only thing you
can do. Also check the battery plug on the board. I had a problem with the
type of wire they chose, as it would break easily if
AB8O:
I would like to hear from my fellow Elecraft fans regarding general
impressions of the K3 versus the SDR 5000A, software defined radio.
Good question John...unlikely it can be answered
completely until after the K3 ships. I've also been following
the 5000, and here are some
In a message dated 10/6/07 12:07:38 PM Eastern Daylight Time, [EMAIL PROTECTED]
writes:
According to
Chuck, the HR-1680 was released in the Fall of 1967,
I think he meant fall of 1976.
The first advertisement for the HR-1680 that I could find was QST for
October, 1976. The ARRL Product
KD8K:
The K3's close in numbers will be around the same is the 5000,
but the wider spaced measurements I expect to be much better
then the Flex-5000.
John you are correct that the 5000 will have
constant IMD and BDR over the entire range of spacings.
But IMD does not appear to be
Thank you for the replies on my KX1 power on issues. Don Wilhelm has me
going in a good trouble shooting direction. I will post resolution after I
finish the process.
The issue of the KX1 not remembering my last frequency was an operator
error, one needs to be on a frequency for 30-seconds before
Bill Tippett wrote:
So I agree with your comments in general, but I
feel they apply more to BDR and Phase Noise than IMD.
Hi Bill,
Yes you are correct on that. For some reason I got the BDR and IMD
numbers mixed up. However, I do believe that one of the FAQ's mentioned
a 20KHZ
Hello Bill!
A few additional things to note:
WHAT THE ADC CONTENDS WITH
1a) In the K3 architecture, the 24-bit analog to digital converter (ADC)
is exposed only to signals that make it through the roofing filter. This
is typically less than a 3 kHz slice of spectrum, and may only be a
Lyle Johnson wrote:
2b) In the typical QSD/ISD system, a quadrature signal is generated by
a DDS. DDSes can have very low phase noise, but typically have
numerous spurs. While mitigation techniques exist, the fact remains
that there are usually several spurs only 70 or 80 dB down inside a
Any news regarding Writelog?
Jay - KT5E
I have full faith in John's abilities however.
I'm hoping to try N1MM Logger a bit later today in the Cal QSO Party
and then again next weekend in another 'activity' as well. Will report
if I find ANY show stoppers.
73,
Tom Hammond N0SS
In the Bavarian Contest Club and in much of the EU WinTest has become
very popular for contest logging.
Do any of the field testers have experience with WinTest and the K3 yet?
vy 73 de toby
--
DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz)
K2 #885
K2/100 #3248
K3 #??? (200)
DOK C12, BCC, DL-QRP-AG
I sold my SDR1k due to the spur issues. I loved the radio, mostly. The
panadaptor I really miss. My Icoms scope is nowhere as flexible and slick. I
don't have any issues with BDR, IMD as I live in the country with no
competition. If the bands ever open back up and I get some real activity I may
N6KR:
Just a quick follow-up to Lyle's posting.
You guys are simply awesome! Now get
my K3 shipped! :-)
73, Bill W4ZV
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber
I have an older version of WT (2.28). It does not have any Elecraft support
options. That said, the Kenwood protocol seems to work with band changes.
But changing mode on the K3 does not seem to pick up in WT. I don't know
what changes they've made since this older version.
73
Greg
AB7R
Jim, N2EY, is correct; the 1967 is a typo on my part. Chuck Penson states that
the HR-1680 was released in the Fall of 1976.
Original message
Date: Sat, 6 Oct 2007 15:54:32 EDT
From: [EMAIL PROTECTED]
Subject: Re: [Elecraft] OT - Heath CW Twins
To: [EMAIL PROTECTED], [EMAIL
But changing mode on the K3 does not seem to pick up in WT.
That's interesting to hear. All versions of WinTest I've used in the
last 2 or 3 years, have worked nicely in Kenwood mode with my K2.
Wonder what the difference is?
vy 73 de toby
--
DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz)
K2 #885
2a) In a quadrature sampling detector (or integrating sampling
detector) architecture, used by the SDR-1000/5000 series, the
ADC is exposed to all the signals in the detector passband,
typically more than 200 kHz wide even if the displayed passband
is less.
This is key in relation to
I'll keep my mouth shut in future.
Mark M5MDH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
K2 Problem (serial No. 4159)
Hello dear builders...I have a problem.
At the 4 Mhz Oscillator calibration a problem occurred:
First the counter did not show 12090 +/- 30 KHz but: ~ 8.9 MHz
I checked the board and discovered that I had made a mistake with D16; then
I soldered D16 in the correct
It has been a few weeks since I built the KSB2 option. There is one problem
I haven't yet resolved. The response on the USB side of OP1 is not as broad
as the LSB side, and has a narrower peak. I didn't pay much attention to
this before. I've never transmitted in USB except for the digital modes
Markus,
For now you do not know if the problem is with the counter or with the PLL.
Is your friend close enough that you might be able to borrow his K2
control board (and his internal counter probe) for a quick test?
If so, then substitute the known working control board for yours and
Steve,
Tell us more. The SSB OP1 filter as observed with Spectrogram in LSB or
USB should show a relatively flat passband extending from about 300 Hz
to 2600 Hz. I do not understand 'peak' in that context. It may be that
your BFO frequencies are not adjusted properly, but your use of the
Good Evening to You All,
Weather has switched here in Oregon, it is now coming straight out of
the Gulf of Alaska. It is very chilly and very wet. Good thing I have
plenty of wood in the stove and next to it. Sam is happy indeed roasting
next to the fire. I must remember to turn him
36 matches
Mail list logo
