>>> 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 additio
onday, 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 might be
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
K3
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
wide.
73
Gian
I7SWX
Message: 33
Date: Tue, 19 Mar 2013 04:49:20 -0500
From: "Fred Smith"
To: "'Bill Clarke'" ,
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID: <004501ce2487$0811eb20$1835c160$@com>
Content-Type: text/plain; charset="US-ASCII"
larke
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
Mods on paper and needs a K3 to test them on? Really?
Perhaps I read the message incorrectly?
Bill W2BLC
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: ma
__
>> Da: Wes Stewart
>> A: "tnny...@yahoo.com" ; "elecraft@mailman.qth.net"
>> ; Giancarlo Moda
>> Inviato: Venerdì 1 Marzo 2013 19:02
>> Oggetto: Re: [Elecraft] K3 mods by I7SWX
>>
>>
>> It's the second mixer that needs imp
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 Moda, "elecraft@mailman.qth.net"
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID:
>
> Da: Wes Stewart
>A: "tnny...@yahoo.com" ; "elecraft@mailman.qth.net"
>; Giancarlo Moda
>Inviato: Venerdì 1 Marzo 2013 19:02
>Oggetto: Re: [Elecraft] K3 mods by I7SWX
>
>
>It's the second mixer that needs improvement.
>
It's the second mixer that needs improvement.
Wes N7WS
--- On Fri, 3/1/13, Giancarlo Moda wrote:
From: Giancarlo Moda
Subject: Re: [Elecraft] K3 mods by I7SWX
To: "tnny...@yahoo.com" , "elecraft@mailman.qth.net"
Date: Friday, March 1, 2013, 10:18 AM
Hi Milverton,
interested Hams.
Thanks and best 73
Gian
I7SWX
>
> Da: "tnny...@yahoo.com"
>A: Giancarlo Moda ; "elecraft@mailman.qth.net"
>
>Inviato: Venerdì 1 Marzo 2013 17:56
>Oggetto: Re: [Elecraft] K3 mods by I7SWX
>
>
&g
;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
other mods;
- terminating the filter bank
- PSU voltage regulator noise
As allways.. very interested in K3 improvements 8-)
73's Twan - PA0KV
K3 - 1770
Message: 20
Date: Thu, 28 Feb 2013 13:32:03 -0800 (PST)
From: Keith-K5ENS
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 mods
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 othe
an
I7SWX
Message: 17
Date: Thu, 28 Feb 2013 13:00:12 -0800
From: Wayne Burdick
To: "Twan at 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;
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.
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,
Wa
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;
- terminati
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 me
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 o
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 h
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
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
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'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 W4ZV wrote:
>>
>> Carl Clawson-2
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 wrote:
>
>
> Carl Clawson-2 wrote:
>>
>> One that I notice to be missing is the KSYN3 stiffener mod. The app note
>> is
>> store
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?
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 any
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:
involving one resistors removal I
believe.)
73 de
Jeff Cochrane - VK4BOF
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 wi
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 ba
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. T
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
> >> - 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 >
mission on any non amateur band on the K3 should not be allowed. You at
> least would have some credibility on the issue.
>
> 73
> John
>
> --- On Sat, 12/25/10, Jeff Cochrane - VK4BOF
> wrote:
>
>> From: Jeff Cochrane - VK4BOF
>> Subject: Re: [Elecraft] K3:
ane - VK4BOF
> Subject: Re: [Elecraft] K3: Mods for wide band transmiting?
> To: "DM7ZQ" <73...@gmx.net>, elecraft@mailman.qth.net
> Date: Saturday, December 25, 2010, 9:03 PM
> Benjamin,
> Speaking from experience, the 'wideband' software 'tool'
> w
D, Australia
Elecraft K3# 4257
- 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
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:
http://elecraft.365791.n2.nabble.com/K3-
riginal Message-
From: elecraft-boun...@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
-boun...@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.
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
LARC
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,
J
ected 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 wrote:
From: John E. Reiser
Subject: Re: [Elecraft] K3 Mods
To: n...@nf4l.com, elecraft@mailman.qt
Hi Mike, NF4L,
Another great suggestion! I forgot to check this, and will do so in the
morning. Is this net great, or what!
Many thanks and VY 73,
John
- Original Message -
From: "Mike"
To: "John E. Reiser"
Sent: Thursday, June 03, 2010 7:51 PM
Subject: Re
.
I miss my K3.
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
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 mods,
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
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 module
gt; -Original Message-
> From: elecraft-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
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 remov
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
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 ot
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
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 could
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
componen
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 physical
Confusingly, there are actually two mods for the K3 with similar names:
The "K3 AF Mod Kit Rev B" which is called the "K3 AF Stage Upgrade" in its
instructions. This one is for the line out and speaker signal pathways, and
involves changing an RF choke and two 51 ohm resistors.
The other mod is
Hello Steven!
Congratulations on tackling the mods! I'm sorry one gave you trouble.
Installations like that are easily done by what I call "tack-soldering".
That's how the board in the photos was modified.
1) Shape and trim the resistor leads so they touch the solder pads when the
resistor is
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 fo
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.
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
Also beware of the followi
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 conte
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 then
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 charge
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 t
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'
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.
A
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
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 equipme
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 sh
> I was just curious if there have been any mods to the K3 Since June of Last
> year other than firmware.
Yes, please see < URL:http://www.elecraft.com/K3/k3_app_notes.htm >
73,
Lyle KK7P
__
Elecraft mailing list
Home: http://mailman.qt
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 a
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
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list
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 r
Will this thread ever die a graceful death?
- Original Message -
From: "Vic K2VCO" <[EMAIL PROTECTED]>
To: "Elecraft Reflector"
Sent: Wednesday, April 02, 2008 11:37 AM
Subject: Re: [Elecraft] [K3] - mods and solder
Alan Bloom wrote:
Water-soluble flux
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 on
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
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 pre
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' me
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 non-
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 labe
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