At 06:54 PM 9/24/2009, .k8dd. wrote...
At least on the K2 with it's bouncing switches it is not only a known
problem, especially with the A/B and A=B switches, but you can fairly
easily
replace them - I changes out about 20 of them on my two K2s.
K2 switches are readily available from Mouser and
At 07:53 PM 12/30/2008, Mel Farrer wrote...
I would like to add a comment on removing solder from SMT via
holes. There are three methods and the first two have been
discussed. I have found as the technology gets better, smaller, the
plated through holes also get really small. Like 0.020 or
At 02:22 PM 11/14/2008, [EMAIL PROTECTED] wrote...
I can see that this question has been asked in the past, but appears
not to
have been answered. Can Elecraft share, assuming it has one, its list
of
Mouser part numbers for the K2 and its options?
Here's a few electromechanical parts:
At 08:40 PM 11/11/2008, Mark Bayern wrote...
it should be this one for the DSP
http://focus.ti.com/docs/prod/folders/print/tms320vc33.html
That page _DOES_NOT_ say the chip is 'obsolete', it says 'Product is
Not Recommended for New Design'.
Same thing. You're obviously not familiar with
At 10:17 PM 11/11/2008, Mark Bayern wrote...
Same thing. You're obviously not familiar with semiconductor
marketing, and
how they spin things.
No it is not.
Obsolete - Outmoded in design, style, or construction.
QED.
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What callsigns do McCain and Obama hold? I'm guessing McCain hangs out
on 80M AM, and Obama on 2M FM, but that would mean they don't have K2s.
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At 05:55 PM 10/22/2008, Scott McDowell wrote...
My K2 af gain pot has started acting up. I have noticed that if I
press down on the knob the audio will increase in volume. I guess that
means it is time to change it out. Right?
You can get them from Elecraft, or Mouser (p/n 317-2080-5K, Alpha
At 09:48 AM 8/21/2008, Jim Denneny wrote...
I am about to attempt the N8LP K3 Buffer Mod for improved RX
performance. It involves exchanging two, extremely small,
surface-mount resistors.
Chip-quick (
http://www.chipquikinc.com/newsletters/cq_new_june_2004.htm ) is great
for doing SMT
At 06:33 PM 7/26/2008, Mike Short wrote...
Will RG-174 handle 100W at HF/6M?
Maybe. RG-188A/U (Belden 83269) might be a bit better, it's rated for
much higher temperatures (to 200C), and has slightly less loss (vs.
Belden 8216 RG-174/U).
At 02:14 AM 5/14/2008, Joe Planisky wrote...
extremely erratically, presumably because it assumes 2 stop
bits. The
KIO2 manual says to use 2 stop bits, but that 1 stop bit will also
work.
That is only possible if the K2 firmware sends 2 and receives 1. Since
the source code isn't available
At 06:38 PM 4/28/2008, Brian Lloyd wrote...
Other than an official Elecraft-supplied buffered audio input and
output for data modes, what else would you add to the K2?
Open source firmware.
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Post to:
At 11:07 PM 4/6/2008, [EMAIL PROTECTED] wrote...
What would you use instead? Particularly given the desire for a
genderless
connector that can carry considerable current (20+ Amps)?
Considering these are used for carrying polarized power signals, why do
you want/require that they be
At 09:14 AM 4/7/2008, [EMAIL PROTECTED] wrote...
Considering these are used for carrying polarized power signals, why
do you want/require that they be genderless?
Convenience and flexibility.
That's a non-response, since it implies that alternatives aren't. I
believe that most hams find UHF
At 10:57 AM 4/7/2008, Jeremiah McCarthy wrote...
Tin whiskers could be a problem in more than a home entertainment
system, a PC, or that K-3 under the dash...Automobiles
WEEE/RoHS, at least the bit dealing with lead, exempts automotive,
military and life-critical devices. The ELV directive
At 07:25 PM 3/27/2008, Lyle Johnson wrote...
Sure he can. CW - RTTY and CW - PSK31 are already features on the
K3, and the VFO B display provides decoding of those modes, too (as
well as CW...)
For a presentation on this topic see
URL:http://www.microhams.com/softcontent.aspx?scId=48
My
At 07:04 PM 3/27/2008, Mike Miller wrote...
I want to use the K3 for RTTY and PSK 31
Which Iambic key is the easiest to learn to use? I currently work CW
with a straight key.
You aren't going to do RTTY or PSK31 with anyone's iambic key!
___
At 09:06 PM 3/22/2008, DOUGLAS ZWIEBEL wrote...
Loose is the opposite of tight.
Lose is when you don't win
Is an Elecraft gray, or grey?
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At 05:30 PM 3/15/2008, Fred Jensen wrote...
I'm building the KAF2 Audio Filter. Two questions for whoever knows:
There's a good picture on the Elecraft site which should answer your
concerns: http://www.elecraft.com/kaf2/kaf2_top.jpg
___
Elecraft
At 01:42 PM 3/7/2008, Bruce Thompson wrote...
I'm looking for some software that I can use to create block diagrams
for
electronic setups.
OpenOffice is free ( http://www.openoffice.org/ ), and the Draw
application can do what you want. You can create common symbols and
save them to the
When I use a word,' Humpty Dumpty said, in a rather scornful tone,' it
means just what I choose it to mean, neither more nor less.'
'The question is,' said Alice, 'whether you can make words mean so many
different things.'
'The question is,' said Humpty Dumpty, 'which is to be master -
At 08:28 AM 2/14/2008, [EMAIL PROTECTED] wrote...
This is why you want to have a signal with a very high average power
level, but one which is also not wider than necessary.
That sounds like CW. :-)
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At 09:50 AM 2/12/2008, DW Holtman wrote...
Should companies be able to mine information such as who ordered
what from this forum and send E-Mails for selling their goods? I
understand that this is parts for K2. Maybe this is alright and I'm
all wet.
If you received spam from a list
At 09:05 PM 2/6/2008, DOUGLAS ZWIEBEL wrote...
5. The entire basis for CONTESTING is competition...a competition of
who has the best set of HUMAN skills...
Hams have (as a whole) always embraced new technology, but there are
probably some still complaining that heterodynes are unfair
At 04:14 PM 1/21/2008, Pete wrote...
Congratulations for calling the whiners and malcontents to task for
their disgraceful behavior. I, for one, wish that the reflector was
'monitored' to weed out the thrash.
Like self-appointed moderators?
___
At 10:16 AM 11/13/2007, Samuel Strongin wrote...
just use the cheapest piece of junk and try to justify it. The fact of
the matter 1.5 does matter.For example Icom radios fold back when
seeing a swr of 1.5 to one.
Remind me to never buy an Icom. Who would want a radio which can't be
used
At 12:28 AM 10/19/2007, Don Wilhelm wrote...
The 'tin-whiskers' problem is one that exists mainly at the chip
level.
The migration of conductive paths between pins that can be soldered by
hand techniques is *not* a problem because the 'whiskers' typically do
not extend that far. It is a
At 02:46 AM 10/16/2007, Jack Brindle wrote...
There is a huge difference between the old battery-backed memory and
using Flash memory. As you note, the battery will eventually run
down, causing memory to be lost. Flash memory will retain its
contents for a very long period - Microchip specifies
At 03:59 AM 8/29/2007, Charles Harpole wrote...
So called D connectors have design specifications issued by
various mfg of them. Most list a limited life of 10 to 30 plug/unplug
cycles. That is from the designers.
You must be looking at some cheap Chinese clone. Please cite the other
At 11:59 AM 8/29/2007, wayne burdick wrote...
49.380 MHz. All signal sources are phase-locked to the refernce. Fine
adjustment occurs in firmware, and once calibrated, it's accurate to
about 1 Hz through 6 meters at the calibration temperature. The
high-stability option is at the same
At 12:48 PM 8/29/2007, wayne burdick wrote...
Maybe I wasn't clear on this. I said it was accurate to 1 Hz ... at
the calibration temperature. That says nothing about what happens as
the temperature *changes*.
[high stability] +/- 0.5 ppm ... applies to the entire temperature
range, not per
At 11:44 PM 7/17/2007, Charles Harpole wrote...
The Power Pole connectors on the K3 are a bad choice for this
application why? :
In less time than it took to write your complaint, you could have made
up an APP to binding post/banana plug adapter cable, and solved the
problem you have.
At 05:25 PM 7/5/2007, joey mcg wrote...
Ok, totally confused by the zero beat to WWV. I can zero beat an
un-oscillated WWV carrier at two points, in USS and LSB. When they
add the odd-hour 600hz tone, things become even more confusing.
Bounce back and forth between LSB and USB (hold down CW
At 05:08 PM 7/2/2007, Scott McDowell wrote...
Does the K2 have an adjustment to correctly set the cw speed? If it
does I can't seem to
find it.
When I set the CW speed on mine on 20 wpm it actually sends about 25
to 27 wpm.
I realize that you can slow this down by more spacing between the
You could let NASA argue with him.
GSFC-733-HARN-01, Rev C, July 2003, DESIGN AND MANUFACTURING STANDARD
for ELECTRICAL HARNESSES (GFSC is Goddard Space Flight Center) says:
4.20 Conductor terminations- The preferred method of terminating
conductors is with a crimp termination. However,
At 06:51 PM 12/21/2006, Ron D'Eau Claire wrote...
I hope we didn't drive you away with the answers, Rob!
Keep in mind that there is NOTHING wrong with the quality and
durability of
joints that lead-free solder makes. It's great stuff that works very
well.
It's very premature to make that
At 02:12 PM 12/14/2006, Howard W. Ashcraft wrote...
For an example of what damage can be done, I am restoring a Tek
SC504
oscilloscope where someone used contact cleaner/solvent on the channel
2
attenuator.
Tek used special PC board material (polysulfone?) in the attenuators
for many of
At 02:06 PM 12/13/2006, Craig Rairdin wrote...
After you clean your boards and void your warranty, take that 91%
alcohol,
put about a half-inch in the bottom of a one-gallon glass apple cider
jug,
swirl it around, and drop in a match. It'll entertain the kids for
hours.
Only if picking glass
At 10:08 AM 12/6/2006, Darwin, Keith wrote...
Very key point. If you want to take heat out of a box, you're far
better to point the fans out and let them draw in cool air from the
other side than to point the fan in and blow cool air in. Here's
why.
When you blow a fan into a box (K2, PC,
At 09:30 AM 10/23/2006, Ken Kopp wrote...
The following is from a NASA-certified solderer ... me. (:-))
Contrary to the belief/practice of many, component leads protruding through a
solder pad should NEVER be cut off flush with the board. They should be cut
off at a length that is several
At 11:03 AM 10/18/2006, Karl Larsen wrote...
I hold all my toroid coils firm to the board AFTER all tuning is complete
with my Hot Glue system. It tacks down everything but not so tight you can't
get it loose. I do not find the hot glue to be corrosive.
Beeswax is the traditional tried
At 09:13 AM 9/20/2006, Martin Gillen wrote...
Which FCC or ARRL guideline mentions chirp, or otherwise attempts to
regulate the keying waveform?
97.307(a) No amateur station transmission shall occupy more bandwidth than
necessary for the information rate and emission type being transmitted, in
At 03:03 PM 8/15/2006, Darrell Bellerive wrote...
As an alternative is there a direct replacement logarithmic pot that could be
substituted for the linear pot supplied with the kit?
Elecraft p/n E520003
or
Mouser p/n 317-2080F-5K
___
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At 06:28 PM 7/12/2006, ron_w wrote...
would such a change give me more back light without compromising components in
the Front panel board?(ie U3). I doubt there is a problem but it is always
wise to ask ..
If you're equipped to desolder the display, you could replace the backlight
At 12:43 PM 6/21/2006, Jack Brindle wrote...
The current evolution of the RS-232 spec also now contains a pinout
for an RJ-45 8-pin modular connector. ... RJ-45s allow much high panel density
that DE9
connectors, even though they have the problem of being the same as
those used for
At 10:53 PM 6/19/2006, Ron D'Eau Claire wrote...
years I've worked with RS232 interfaces. People jump to a very wrong
assumption that RS232 defines the connections at a given cable connector...
RS232 is a signaling protocol, not a cable pinout scheme.
RS-232 and it's successors are interface
At 04:30 AM 4/2/2006, Nigel A. Gunn G8IFF/KC8NHF wrote...
One assumes you'll never buy a laptop.
They've not had serial ports for several years and USB is usually the only
expansion route.
You just have to look before you buy, and not assume you can't get what you
want. I'm typing this on a
At 12:57 PM 4/1/2006, Lynn Burlingame wrote...
I plan to do a lot of mountaintopping in the next few years and will
be assembling a K1 for this specific use. I need to locate a good
source for MILSPEC high altitude solder that meets Elecraft's
specifications and will not void the warranty. The
At 05:10 PM 3/27/2006, Don Wilhelm wrote...
It is unfortunate that the PC world uses these DE9 connectors for RS-232,
and it is (was) a PC world implementation only, real RS-232 ports use the
DB9 or the RJ45 connectors - these are defined in the RS-232 standard, the
DE9 connector is not in the
Measure V p-p into an accurate 50 ohm dummy load with a decent o-scope. Power
is then V^2/400.
At 01:45 PM 7/3/2005, J. Coote wrote...
Comments on the accuracy of using the Tek 492 method, and on other accurate
wattmeter options?
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At 06:59 AM 4/29/2005, Web Williams wrote...
As it turns out, remote base operation in the U.S. is ILLEGAL if it
transmits below 29.5MHz. The link to your HF set (which may only transmit
ABOVE 29.5MHz) may _ONLY_ be one of the following choices:
A. RF link above 222.15MHz
B. Hard-wire control
At 08:34 AM 4/26/2005, Bob Rennard wrote...
My 75S-3B cost about 1/8th of what my 1969 Corvette cost. So, I should be
able to buy a nice receiver today for about $6,000.
It's more reasonable to compare similar items, such as electronics. My HW-16
cost about 1/100 of what a 1970 personal
At 05:21 PM 4/19/2005, wayne burdick wrote...
That said, looking into my crystal ball I can see a time when home
pick-'n'-place machines with AI-enabled vision systems become commonplace
Is that a pre-announcement of a new kit? Where do I get in line?
actually knew what you were doing
when you spamed the list, that just makes it worse and you do deserve censure.
With your history, you should know better.
At 10:41 AM 4/13/2005, Earl W Cunningham wrote...
Mike S wrote:
It's exactly because of clueless newbies like you that there is a spam
problem
DO NOT forward spam to a list. Most certainly DO NOT - NEVER, EVER - buy a
product advertised via spam. To do so is the act of a naif, as it only
encourages more spam. I'm trying to think of any reasonable criteria by which
you shouldn't be immediately dispelled from the list for spamming
At 10:02 AM 3/15/2005, Joe Jones wrote...
So, bearing in mind that I only wish to secure the edge of the toroids that
are upright and touching the PCB, not coat the whole toroid in adhesive, (and
change the inductance) what adhesive would be best ...?
Beeswax is the traditional material for
At 10:50 AM 12/19/2004, DR wrote...
and there is NO way I can secure the heat sink cover. Yes, the nylon
shoulder washer is flush with the hole on the transistors and I made sure it
is centered, I even measured the screw to make sure I'm using a 1/2. I did
a search to see if anyone else had
At 08:08 AM 12/17/2004, Brian Wruble wrote...
How in the world did a change to solid state affect a naming convention? 1
Hz = 1 cps, regardless of the circuit devices. 1 uuf (micro micro farad)
= 1 pf, regardless of the devices used in the circuit. I am baffled by this
notion. Can you provide
At 09:06 PM 12/16/2004, Doug Faunt N6TQS +1-510-655-8604 wrote...
And cycles for frequency, by itself means very little. The proper
term was cycles per second, which is what Hertz replaces, not just
cycles
I don't think Mr. Hertz used cycles since he was a scientist, and
would think accuracy of
At 03:19 PM 12/12/2004, Ralph McClintock wrote...
Don,
The computer generates an on-off. Writelog does not allow any adjustment of
keying characteristics. The Bencher generates an open or ground. Why does
the K2 recognize the Bencher, a mechanical switch, as soft and why does it
recognize the
At 09:54 AM 12/2/2004, [EMAIL PROTECTED] wrote...
I'm wondering if anyone has ordered and received the Circuit Specialists
soldering stations which looked like Hakko 936's ? If so could they give us a
similar report on that unit?
At $35.00 it is indeed a tempting buy, but with Mike's
(this is a resend to the list, the first was bounced by QTH.net because their
postmaster has some brain-dead SMTP spam checking misconfiguration which
produces false positives (for the subject line Circuit Specialists 701 rework
station:. Gr.)
About a week ago, Tom Hammond pointed out that
At 01:24 AM 11/30/2004, Stewart Baker wrote...
problem, but I am back with the noise. It is a shame that there is no way to
get
at the +8V rail on the front panel board as that would be an ideal mic supply.
The Auxbus connection between the RF board and front panel is unused. You could
cut the
At 06:47 AM 11/26/2004, Tom Althoff wrote...
While squeezing out CW using the internal keyer I occassionally manage to
close both paddles at the same time and generate a continuous tone.
I only see three menu choices. Normal paddle (auto-detect on) Reverse paddle
(auto-detect on) and Handkey
At 09:05 PM 11/24/2004, [EMAIL PROTECTED] wrote...
closest to the edge of the radio. But, it looks like the ground side is the
one closest to the center of the radio not the edge. In other words, either
the drawing on page 10 is backwards or the locking tab has to be to the back
of the
At 07:13 AM 11/22/2004, G. Beat wrote...
I have a couple of additional comments on the Circuit Specialists Haako-clone
offering.
1. This offering has been noticed by US authorized Haako dealers. I can't
repeat what they side here. This dealer believes that the Far East mfg. is
second
At 07:11 PM 11/21/2004, Bill Tippett wrote...
A spare heating element was also included with it. If of any
identification help, all tips' model #'s are all preceded by the
word AOYUE.
BINGO. Info at http://www.aoyue.com/english/index.htm
These appear to be close Hakko clones. I ordered a 701
At 05:30 PM 11/11/2004, jerry wrote...
Anyway, I am now using Spectrogram and I have the Yaesu set for Lower SB and
receiving the tone of WWW (10MHZ) at the 1k mark, the display on the MP reads
10001000 Hz.
On the K2, using LSB , the display reads .84 and the tone of WWW
(10Mhz) at
At 05:26 PM 11/7/2004, Pierre Vallee wrote...
In doing the voltage checks for U1, I find readings of 12.77v on pin 5 (should
be -8) and 0v on pin 12 (should be 5). I believe the circuit diagram shows
these pins being part of the transmit circuitry (pin 2). Could U1 be my
problem? Any
Just a quick report.
Tom did a great job putting together these new kits and they work great. The
small size of the SMT board allows it to easily fit between the K2 control and
front panel boards. I used a bit of sticky back Velcro to mount mine.
I think he's just about out of kits, but still
It seems that some people have problems with low audio out on some K2's. There
was a recent thread where I mentioned that it may be possible to easily
substitute an LM386 for the LM380 AF amp and get more gain. I'm happy to report
that this works FB.
In actual practice, I used an NJM386BD,
At 06:42 PM 10/22/2004, wayne burdick wrote...
However, because of the problem with clipping at high signal levels, I
definitely don't recommend that anyone do this unless they're desperate for
more audio. The LM386 is a lower-power part and is also noisier than the
LM380, partly because of
At 05:46 PM 10/11/2004, Peppino Berria wrote...
I've a WESD51 soldering
station that I bought during my journey in Texas: 120
V. 60 Hz, different than voltage we have here in
Italy, 220 V. 50 Hz. I'm thinking to use an
auto-trasformer that I've in the shack for reduceing
voltage: in-220 V, out-110
At 07:40 PM 10/11/2004, john wrote...
Does someone have a nice high res shot of a plain K2 that I could
use in a QSL card?
There's a K2-100 @ the Elecraft site, but I'm looking for a vanilla
K2.
There's a good one on the second page of the manual, which you can download
from the Elecraft site.
One option for more volume would be to change the LM380 audio amp to an LM386.
There are only 3 pins in common, but 3 others are just offset one hole and
could be easily done by hand. Add a 10 uF cap across the remaining two pins,
and you've got 12 db more gain than the original. You might even
At 04:59 PM 9/29/2004, Don Ehrlich wrote...
The signal at TP3 is about 2 volts peak-to-peak. Is this a normal
value? It looks marginal to me for triggering the Q9/Q10 flip-flop.
If so then the PLL Ref Oscillator has a problem.
Q9 Q10 form an amp/buffer to the U9-15 input. U9-10 provides power
After finishing #4439, I'm getting low on solder. I've always used Ersin
Multicore (now part of Loctite), and got my last pound from Digi-Key, which
doesn't stock it anymore. Searching the archive, it seems that it's pretty hard
to find a distributor for Multicore these days. A bit of web
At 04:23 PM 10/3/2004, john wrote...
Does anyone know the Mouser PN (If there is one) for the PANEL mount
side of the mic connector (in this case, the Male )?
Buxcomm carries them: http://www.buxcommco.com/afconns.htm
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At 03:02 PM 9/17/2004, Eric Swartz - WA6HHQ, Elecraft wrote...
I thought we had removed the comments about K2 server from the web page a long
time ago, but I suspect there is still something in the installation notes
that come with K2Remote. I'll take that out too.
The readme file which
At 06:13 PM 9/17/2004, Eric Swartz - WA6HHQ, Elecraft wrote...
K2 Remote was never sold as part of the KIO2 serial interface.
You selectively quoted my message, conveniently ignoring the specific quote
where Elecraft made the unequivocal statement It is included via this page as
part of our
What's the status of K2 Remote and K2 Server? Despite multiple promises
otherwise, development seems to have stopped in 2001 with no Server available.
Might I suggest that if Elecraft doesn't want to complete these to the promised
level, they might make a contribution to the G4ILO K2net project
At 11:28 PM 8/1/2004, Ron D'Eau Claire wrote...
I have Outlook set to put anything with [Elecraft] in the subject line into
the Elecraft message folder. That word is consistent, no matter what
changes in the address fields.
Consistent, yes. It is also ambiguous. It does not uniquely identify a
In general, To and From headers shouldn't be used to filter list traffic.
Properly used, neither will contain information which can uniquely identify a
message as coming from a list.
Most modern list servers add specific headers suited to identifying messages
coming via the list. In this
--Original Message Text---
From: [EMAIL PROTECTED]
Date: Fri, 2 Jul 2004 07:30:49 EDT
600 ohms is still very much the standard.
At 10:36 AM 7/2/2004, Jim Brown wrote...
I believe you may be confusing voltage levels with impedance.
Analog phone circuits are indeed transmission lines. Try to
At 02:47 PM 7/2/2004, Jim Brown wrote...
On Fri, 02 Jul 2004 12:47:44 -0400, Mike S wrote:
Analog phone circuits are indeed transmission lines.
ONLY if they are long enough...
At 3 kHz, the limit of baseband audio on POTS,
1/20 wavelength is nearly two miles.
According to Verizon, over 20
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