: Elecraft List elecraft@mailman.qth.net
Sent: Monday, April 29, 2013 12:14 AM
Subject: Re: [Elecraft] K3 mods by I7SWX
Maybe Wayne might weigh in.
I have only ecperienced an overload once. A mobile passing by decided to
call me during a qso. I was not impressed.
I would wonder what the tradeoff
I read the whole thing, too. It appears that the improvements are
measurable...the only question is, Is it worth the trouble? It is
obviously an awful
lot of work.
The short answer is probably no -- it's not worth the effort unless you really
need to eek out a few dB of additional headroom
I read the whole thing, too. It appears that the improvements are measurable...
the only question is, Is it worth the trouble? It is obviously an awful lot
of
work. Another question one must answer is, Am I willing to accept the decrease
in my K3's resale value? after you are done cutting
Maybe Wayne might weigh in.
I have only ecperienced an overload once. A mobile passing by decided to
call me during a qso. I was not impressed.
I would wonder what the tradeoff might be, if any.
I will not be modifying my k3 anytime soon. If it aint' broke, don't mess
with it.
73
Gary
Vk1ZZ
Sent: Monday, March 18, 2013 1:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 mods by I7SWX
Mods on paper and needs a K3 to test them on? Really?
Perhaps I read the message incorrectly?
Bill W2BLC
__
Elecraft mailing list
I7SWX
Message: 33
Date: Tue, 19 Mar 2013 04:49:20 -0500
From: Fred Smith m...@mo-net.com
To: 'Bill Clarke' b...@w2blc.net, elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID: 004501ce2487$0811eb20$1835c160$@com
Content-Type: text/plain; charset=US-ASCII
I guess
; elecraft@mailman.qth.net
elecraft@mailman.qth.net; Giancarlo Moda i7...@yahoo.com
Inviato: Venerdì 1 Marzo 2013 19:02
Oggetto: Re: [Elecraft] K3 mods by I7SWX
It's the second mixer that needs improvement.
Wes N7WS
--- On Fri, 3/1/13, Giancarlo Moda i7...@yahoo.com wrote:
From
Mods on paper and needs a K3 to test them on? Really?
Perhaps I read the message incorrectly?
Bill W2BLC
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post:
n...@elecraft.com
To: Twan at pa0kv.nl pa...@pa0kv.nl
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID: 461dacc5-6aae-49d4-8c8a-b93dab3b6...@elecraft.com
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Twan,
The K3 is one of the highest
Hello Wayne.
I do agree with you that the K3 is an amazing transceiver. But this is
mostly the reason why a ham buys his gear.
So, in a business point of view I think that an improved K3 plug-in
mixer, designed by Elecraft, would sell!
Electronics is part of the HAM-hobby for me and many
: Re: [Elecraft] K3 mods by I7SWX
Message-ID: 461dacc5-6aae-49d4-8c8a-b93dab3b6...@elecraft.com
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Twan,
The K3 is one of the highest-performance radios available (very high
on everyone's list, including Sherwood's). A small
@mailman.qth.net
Sent: Friday, March 1, 2013 7:40 AM
Subject: [Elecraft] K3 mods by I7SWX
Dear Twan,
thank you very much for your comment.
Wayne is right with his reply.
Also right is the comment from Keith, XE3/K5ENS
Then again if you want your K3 to be one of the top .1% these mods will help
for interested Hams.
Thanks and best 73
Gian
I7SWX
Da: tnny...@yahoo.com tnny...@yahoo.com
A: Giancarlo Moda i7...@yahoo.com; elecraft@mailman.qth.net
elecraft@mailman.qth.net
Inviato: Venerdì 1 Marzo 2013 17:56
Oggetto: Re: [Elecraft] K3 mods by I7SWX
It's the second mixer that needs improvement.
Wes N7WS
--- On Fri, 3/1/13, Giancarlo Moda i7...@yahoo.com wrote:
From: Giancarlo Moda i7...@yahoo.com
Subject: Re: [Elecraft] K3 mods by I7SWX
To: tnny...@yahoo.com tnny...@yahoo.com, elecraft@mailman.qth.net
elecraft@mailman.qth.net
Date
Da: Wes Stewart n...@yahoo.com
A: tnny...@yahoo.com tnny...@yahoo.com; elecraft@mailman.qth.net
elecraft@mailman.qth.net; Giancarlo Moda i7...@yahoo.com
Inviato: Venerdì 1 Marzo 2013 19:02
Oggetto: Re: [Elecraft] K3 mods by I7SWX
It's the second mixer that needs improvement.
Wes N7WS
I was 'sparring' with Wayne. ;-)
NOT with I7SWX.
Twan - PA0KV
K3 - 1770
Message: 30
Date: Fri, 1 Mar 2013 08:56:11 -0800 (PST)
From:tnny...@yahoo.com
To: Giancarlo Modai7...@yahoo.com, elecraft@mailman.qth.net
elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 mods by I7SWX
Hi!
I just read all about the I7SWX mods and I was wondering what Elecraft's
point of view is in this?
Are these mods really a major improvement? (Are is it 'crap'..)
Are there any plans in the near future to build a new mixer module with
this technology?
What about the other mods;
-
Twan,
The K3 is one of the highest-performance radios available (very high
on everyone's list, including Sherwood's). A small additional
improvement in one or two parameters may be of interest to a few
operators. The other 99.9% of K3 owners do not need to make any
modifications.
73,
Then again if you want your K3 to be one of the top .1% these mods will help.
73,
Keith, XE3/K5ENS
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-mods-by-I7SWX-tp7570516p7570520.html
Sent from the Elecraft mailing list archive at Nabble.com.
I was just on Elecraft's website looking at the K3 mods and parts order
pages.
Is there a list showing which mods were installed in reference by serial
number or build dates?
The parts order page only indicates that these mods are included on all
new K3's.
I have factory-built serial number
Certainly, that list exists. On the opening screen (or any others) of
the Elecraft site, click on K3 Mods + App Notes.
If the information listed in the 3rd column is ambiguous, look to the
4th column, You may have to open the application note listed and read
the contents to determine if it
AC6JA wrote:
I was just on Elecraft's website looking at the K3 mods and parts order
pages.
Is there a list showing which mods were installed in reference by serial
number or build dates?
The parts order page only indicates that these mods are included on all
new K3's.
I have
You may also need K3VFOFILTERKIT K3 VFO Tuning Noise Filter Kit which was
implemented in August 2009...again easy to determine by inspection of the RF
board mentioned below.
73, Bill
Bill W4ZV wrote:
AC6JA wrote:
I was just on Elecraft's website looking at the K3 mods and parts order
Thanks for the help!
Mike AC6JA
In a message dated 9/5/2011 12:51:15 P.M. Pacific Daylight Time,
btipp...@alum.mit.edu writes:
You may also need K3VFOFILTERKIT K3 VFO Tuning Noise Filter Kit which was
implemented in August 2009...again easy to determine by inspection of the
RF
board
I'll get it fixed on the page.
73, Eric
---
On 1/9/2011 5:22 PM, Guy Olinger K2AV wrote:
While the stiffener IS in the orderables, it is NOT in the list of
mods, as Carl reports. It should be in the list.
73, Guy.
On Sun, Jan 9, 2011 at 8:11 PM, Bill W4ZVbtipp...@alum.mit.edu wrote:
I'll provide a little more of an answer to my own question:
Having browsed through the mod kits order page, I was reminded of the DSP
upgrades K3DSPUPGD/K3DSPLPF. These are also missing from the app notes page.
That's all I can come up with.
Thanks 73,
Carl WS7L
K3 #486
I'll get it fixed on
I'm preparing to go into my K3 and do some mods while I have it open to
install new filters.
I see mods listed at http://www.elecraft.com/K3/mods/ but the list is not
complete.
One that I notice to be missing is the KSYN3 stiffener mod. The app note is
stored near the manual but is not linked
Carl Clawson-2 wrote:
One that I notice to be missing is the KSYN3 stiffener mod. The app note
is
stored near the manual but is not linked anywhere that I can find. This is
one that I probably wouldn't bother with, but are there other mods that
somehow never made it to the mod page?
While the stiffener IS in the orderables, it is NOT in the list of
mods, as Carl reports. It should be in the list.
73, Guy.
On Sun, Jan 9, 2011 at 8:11 PM, Bill W4ZV btipp...@alum.mit.edu wrote:
Carl Clawson-2 wrote:
One that I notice to be missing is the KSYN3 stiffener mod. The app note
some credibility on the issue.
73
John
--- On Sat, 12/25/10, Jeff Cochrane - VK4BOF vk4bof.elecr...@gmail.com
wrote:
From: Jeff Cochrane - VK4BOF vk4bof.elecr...@gmail.com
Subject: Re: [Elecraft] K3: Mods for wide band transmiting?
To: DM7ZQ 73...@gmx.net, elecraft@mailman.qth.net
Date
- Original Message -
From: DM7ZQ
Thanks for a short answer, 73 de Benjamin, DM7ZQ
Please note that the original poster is not under FCC jusrisdiction.
Not even close, so FCC certificated issues and other restrictions do not
apply.
Merry Christmas.
73, de Nate N0NB
--
Good evening,
sorry for my ´lowbrow´ question. I do not want to do anything illegal!
Some friends have told them and I wanted to ask the reflector to learn more
about this.
Please excuse - my english is not very fine. Close this question now, it´s
done.
Vy 73 and thanks for the many answers.
Best
Benjamin,
If you are referring to ESSB mode, the K3 already includes it, you only
need to 6 kHz filter.
That filter will also allow you to transmit AM with the K3. If you want
FM too, you need the 15 kHz filter. These are all generated in the K3
DSP, no hardware mods to add these modes.
Here in the US there are few bootleggers on MARS, etc., but it's been an
epidemic on the 11 meter CB band since 11 meters was taken from Amateur and
given to CB service.
It was quite predictable, given the huge number of Amateur rigs on the used
market that covered 11 meters when it was a Ham
Innisfail, QLD, Australia
Elecraft K3# 4257
- Original Message -
From: Ron D'Eau Claire
To: elecraft@mailman.qth.net
Sent: Monday, December 27, 2010 6:35 AM
Subject: Re: [Elecraft] K3: Mods for wide band transmiting?
Here in the US there are few bootleggers on MARS, etc
Firstly, I do not want to get involved in a debate on what is (and isn't)
legal - let's leave it at the technical level.
You can (or at least, used to be able to) ask Elecraft for the K3 MARS TX
unlock software. Here is the information received from Elecraft:
Hello Elecrafters, merry christmas,
how can i tune my Elecraft K3 to transmit on ´wide band coverage´ e.g. 11m
Band?
I know, i need an Software plug-in!? How can i get this?
Thanks for a short answer, 73 de Benjamin, DM7ZQ
--
View this message in context:
- Original Message -
From: DM7ZQ
To: elecraft@mailman.qth.net
Sent: Sunday, December 26, 2010 5:18 AM
Subject: [Elecraft] K3: Mods for wide band transmiting?
Hello Elecrafters, merry christmas,
how can i tune my Elecraft K3 to transmit on ´wide band coverage´ e.g. 11m
Band?
I
We have a gov net that we check into weekly at the EOC here at our
installation. It uses frequencies assigned by the NTIA and are near,
but slightly below or above the ham bands. Can the K3 be modified to
transmit on these frequencies? How?
William Conkling
Alternate Spectrum Manager
...@mailman.qth.net
To: Elecraft Reflector
Subject: [Elecraft] K3 - mods for Mars/CAP
Sent: Nov 16, 2010 12:04
We have a gov net that we check into weekly at the EOC here at our
installation. It uses frequencies assigned by the NTIA and are near,
but slightly below or above the ham bands. Can
...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of n...@widomaker.com
Sent: Tuesday, November 16, 2010 9:04 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 - mods for Mars/CAP
We have a gov net that we check into weekly at the EOC here at our
installation. It uses frequencies
Hello everyone,
The problems I was having with my K3, no output in data modes and no KEY OUT,
were caused by myself. I had the plugs in the wrong jacks.
My face is beet red at the moment. Happily, the K3 survived the rough
treatment, and everything is working fine now.
Many thanks and 73,
Hello Everyone,
Yesterday, I did the following mods for my K3 #384, running FW 3.99:
K3DSPUPGD
K3 Negative ALC and External Band Data Pull-up Mod
Front Panel Mike Circuit Mod
IF Buffer Gain Mod.
I was scrupulous about ESD precautions, using a wrist strap and anti-static mat.
Before the
.
Many thanks for your help and VY 73,
John, W2GW
- Original Message -
From: Wes Stewart
To: John E. Reiser
Sent: Thursday, June 03, 2010 6:31 PM
Subject: Re: [Elecraft] K3 Mods
Do you have the Line In (Mic) gain turned up in Data mode? Unlike any
other other rig
Subject: Re: [Elecraft] K3 Mods
Be sure the mark frequency is the same in the K3 as it is in MMTTY. That
bit me once.
73, Mike NF4L
John E. Reiser wrote:
Hello Everyone,
Yesterday, I did the following mods for my K3 #384, running FW 3.99:
K3DSPUPGD
K3 Negative ALC and External Band Data
by the
Line In (Mic) gain setting. This is the only radio I've ever seen where VOX
sensitivity is changed by the microphone gain setting.
Wes
--- On Thu, 6/3/10, John E. Reiser reis...@optonline.net wrote:
From: John E. Reiser reis...@optonline.net
Subject: Re: [Elecraft] K3 Mods
To: n
I see in the new K3 Assembly manual that there are two new items added since
S/N 1567 was born.? The first is for thermal pads that attach to the underside
of the LPA transistors where they meet the bottom cover (page 62).? The second
is aluminum metal plates/shields for the synthesizer modules
Interesting my synthesizer module has the metal cover over it, but there
wasn't the instructions to add the thermal pads on the power transistors
(can't remember my K3's serial no. offhand, but I built it a couple months
ago).
After the misery of having to take the bottom panel off my K2, it
Simple two pole devices don't need much engineering to remove, but I would
caution against the cut in half with sharp cutters method as it can lead to
damaged pads.
I can't be bothered creating special tools for two pole devices, just a quick
flip with a pair of soldering irons, then use a bit
Dave,
Their video showing surface-mount soldering techniques is double-recorded in
the audio channel. Pretty frustrating. Do you know someone there you can tell?
--Oliver
W6ODJ
On 2 Feb 2010, at 3:42 AM, David Lankshear wrote:
Simple two pole devices don't need much engineering to remove,
-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of O. Johns
Sent: Tuesday, February 02, 2010 10:01 AM
To: David Lankshear
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 mods and methods: smt resistor/capacitor
de-soldering
Dave,
Their video showing
It's a process, it's easier than you think, and there is plenty of room for
creativity. I don't pretend to know it all; this works for me.
BASICS:
Light up the work area.
Get comfortable seating.
Buy a pull-down magnifier. Don't skimp here. I use OPTI-VISOR, 3X lenses.
Buy 2 of the
I find that the key to removing SMT components like those involved in the
mods described is best done with solder-wick and quick movement of one
small-tipped iron to both ends of the component. I removed most of the
solder with the solder-wick and then alternate heating of both ends of the
Bob,
I have been successful using that technique, but when there is any
difficulty with the solder re-attaching, I slide a THIN knife blade
under the first side when the solder melts. The blade must be thin (and
must have a sharp edge) so the amount of lift is very small - a thick
blade
David Windisch wrote:
It's a process, it's easier than you think, and there is plenty of room
for creativity. I don't pretend to know it all; this works for me.
BASICS:
Light up the work area.
Get comfortable seating.
Buy a pull-down magnifier. Don't skimp here. I use OPTI-VISOR, 3X
We've got a tech who is amazing with a soldering iron. He has two very
nice soldering irons on the bench next to him at all times. All this
guy does is work magic with a soldering iron all day long...
His two irons are one with a bit of a cup in the end of the tip (for
holding solder) and the
Yesterday I overcame my fears :-) and successfully performed the
following mods on my K3 (S/N 1672):
K3 AF Mod (Line out speaker)
IF Output Buffer Gain Mod
K3 Extreme Signal RX Protection Mod
But, I was not able to perform the K3 AF Output Mod (two 470 ohm
resistors on the KIO3 board). I
I have a K3 from the first batch that needs a small number of
modifications. Due to some physical problems, I am unable to do them
myself. I'm looking for someone within reasonable driving distance
of Baltimore MD who can do the modifications for me.
Thanks in advance.
Thom k3hrn
I'm ready and have all mods (diodes, AF output, Audio Line) and the I/O
board upgrade, KXV3 and KRX3 ready to go. Want to attack this without
having to keep removing things over and over. Should the (diodes, AF
output, Audio Line) mods go first, then the I/O board upgrade, KXV3 next
and
I'm ready and have all mods (diodes, AF output, Audio Line) and the I/O
board upgrade, KXV3 and KRX3 ready to go.
This might help but it doesn't include installing a KXV3 and KRX3:
http://mailman.qth.net/pipermail/elecraft/2009-February/105704.html
73, Bill
--
View this message in
Gary,
If you Just can't do those mods by yourself for some reason, and you need some
help. I will be happy to do your mods for free. You will be responsible to
pay the shipping to and from the states for the required boards, but the mods
(other then normal parts prices) will be free of
I finally got around to installing mods in units #1361 and #2183.
The latter only needed a few mods but #1361 (including KRX3) needed the
following:
K3 AF Mod (K3AFMDKT)
K3 Synthesizer ALC
K3 AF Output
KPA3 12V Sense
Front Panel Mike Circuit
Rear Panel RS-232/Audio RFI Immunity
These
Bill Wrote:
6. The 12V Sense mod can be done by removing the 4 screws holding the fan
assembly and letting it drop enough to give you access to install the diode
on the KPA3.
The procedure above is NOT AUTHORIZED by Elecraft and you shouldn't
attempt it unless you have the proper
Ron D'Eau Claire wrote:
Bill Wrote:
6. The 12V Sense mod can be done by removing the 4 screws holding the fan
assembly and letting it drop enough to give you access to install the
diode
on the KPA3.
The procedure above is NOT AUTHORIZED by Elecraft and you
shouldn't
I really don't want to delve into my K3 with a slodering iron and a baggie full
of bits and pieces.
So how about Elecraft offering a board swap for those of us who do not wish to
do the mods themselves.
Interestingly enough I sent this request direct to Elecraft and as yet I have
had no reply.
rfenab...@gmail.com wrote:
I really don't want to delve into my K3 with a slodering iron and a
baggie full of bits and pieces.
So how about Elecraft offering a board swap for those of us who do not
wish to do the mods themselves.
Hi Gary,
We'll be happy to swap any module that you don't
I wrote:
We'll be happy to swap any module that you don't want to modify
yourself. You can email k3supp...@elecraft.com) and make any necessary
arrangements. However, I think you'll find that all of the mods are
simple and easy to make, if you'd like to make any of them yourself.
I need to
I was just curious if there have been any mods to the K3 Since June of Last
year other than firmware. My unit still needs to have the Mic ground mod
done.
I ask this as my KRX3 is shipping so I will have the K3 open.
I downloaded all the new manuals etc.
Mike W0MU
Hello Julian,
My K3 serial number is 323 and I needed some of the mods. The CW keying rise
time reduction mod was factory installed. However the RXA mod kit for the KXV3
had to be added, and the HAGC mod kit also had to be added. I installed the
SMT components. This kit comes with both SMT
HAGC and CWRISE mods arrived in NJ today. Ordered (oh no) April 1,
shipped April 8..and I didn't use FedEx (why heed my own warnings?).
de Doug KR2Q
___
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Post to: Elecraft@mailman.qth.net
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Well, all this talk of mods got me wondering and I liek some opinions
from this group - I KNOW some of you know a lot about solder.
Resin core solder - thats not acid flux is it?
Most of my solder came from my time with electronics in defense over
30 years ago.
I have 2 reels that are
At 0315 EST on Wednesday April 2nd 2008 David Ferrington (M0XDF) wrote ...
... I KNOW some of you know a lot about solder. ...
--
Hi Dave,
Your 60/40 solder could possibly result in what are referred to as
cold or disturbed solder joints. If I were you I'd only use that stuff
for
ok, thanks for that, the latest RS stuff says:
Crystal 400 60/40 Tin/Lead EN29453, S-Sn60Pb40E
the Elecraft HAGC mod instructions for SMD say
63/37 or 60/40 Sn/Pb-content rosin-core solder, 0.015 to 0.025
diameter
so my S-Sn60Pb40E looks like thats the same alloy, not sure what the
'E'
Some years ago when I was a Materials Engineer for Hewlett Packard,
solder was one of my categories.
The purpose of flux is to reduce (eat away) the oxide coating on the
copper so the solder can stick to it and also as a wetting agent to
reduce the surface tension of the molten solder and to
Alan Bloom wrote:
Water-soluble flux is OK for electronic work only if it is washed off
after the soldering job is complete.
It's very hard to wash off completely and is usually used for mechanized
soldering. It's not recommended by Elecraft. If you don't wash it off
completely, what's left
Thanks much, very informative and useful.
73 de M0XDF, K3 #174
--
A good cook is like a sorceress who dispenses happiness.
-Elsa Schiaparelli, fashion designer (1890-1973)
On 2 Apr 2008, at 17:23, Alan Bloom wrote:
Some years ago when I was a Materials Engineer for Hewlett Packard,
solder was
Will this thread ever die a graceful death?
- Original Message -
From: Vic K2VCO [EMAIL PROTECTED]
To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Wednesday, April 02, 2008 11:37 AM
Subject: Re: [Elecraft] [K3] - mods and solder
Alan Bloom wrote:
Water-soluble flux is OK
Vic wrote:
It's (water soluable flux) very hard to wash off completely and is usually
used for mechanized
soldering. It's not recommended by Elecraft. If you don't wash it off
completely, what's left absorbs moisture from the air and becomes
conductive.
-
From what I've
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