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K3 mods by I7SWX

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I7SWX

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.

Certainly these are not mods for "normal" user, but those "looking for the hair in the egg" any little improvement can make a difference.

Please let me explain how the idea to modify the K3 started. I have dome mods for many commercial equipments from the 70's to the beginning of this century.

I was very curious to see if it could be possible to squeeze out some additional performances from the K3. Certainly, I was not expecting any "flashing results" like obtained on the above equipment. I discovered that the K3 had a removable mixer... what a chance, a way to fiddle with a nice system without going to impair a warranty or damage the radio.

One Italiam OM, IT9BLB, of well known Contest stations IT9BLB, IH9P and IR9Y, told me that they had some difficulties to copy week station with the K3 while their modified FT1000MP (more complex mods) was making easier the copy. That pushed me to do a trial and I went ahead with my friend Sergio, IK8TNG. From what we thought interesting results we designed a swappable H-Mode Mixer and made it available assembled and tested to operators without the need to use a soldering iron. Then I studied some additional changes, experimented already in all the other modified radio.

If you do really like to see changes, and you have no money for a K3 but you possess a K2, then you will need to use a soldering iron and apply similar mods to it. The problem is space availaibility.

You asked Elecraft "Are there any plans in the near future to build a new mixer module with this technology? " I am not the one to answer, but I do not see any problem why Elecraft could not use the H-Mode Mixer in their expected (?) new "K4" in the 2 transformer I7SWX configuration or in the original 3 transformer G3SBI, using the FST3125 or the FSA3157 switches.

Note for Eric and Wayne, my configuration is available for you, I will request only a few million $$$$$ ... hi

The H-Mode Mixer is in the public dominium, probably the only "legal" aspect is reference to the inventor, G3SBI, and maybe to me for the 2 transformer one.

Best 73

Gian
I7SWX

Message: 17
Date: Thu, 28 Feb 2013 13:00:12 -0800
From: Wayne Burdick <[hidden email]>
To: "Twan at pa0kv.nl" <[hidden email]>
Cc: [hidden email]
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID: <[hidden email]>
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 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,
Wayne
N6KR

On Feb 28, 2013, at 12:33 PM, Twan at pa0kv.nl wrote:

> 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;
> - 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 <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID: <[hidden email]>
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.
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Twan at pa0kv.nl

Re: K3 mods by I7SWX

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 other hams.
I modified my Drake B-line, later the Drake C-line and later again the
Drake 7-line. All with much pleasure.

But, if f.i. a mixer mod does not give me notable improvements I would
skip it.
It's up to you guys to figure out what is feasible.

73,

Twan - PA0KV

Op 28-2-2013 22:00, Wayne Burdick schreef:

> 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,
> Wayne
> N6KR
>
> On Feb 28, 2013, at 12:33 PM, Twan at pa0kv.nl wrote:
>
>> 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;
>> - terminating the filter bank
>> - PSU voltage regulator noise
>>
>> As allways.. very interested in K3 improvements 8-)
>>
>> 73's Twan - PA0KV
>>
>> K3 - 1770
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>
>
>
> -----
> Geen virus gevonden in dit bericht.
> Gecontroleerd door AVG - www.avg.com
> Versie: 2013.0.2899 / Virusdatabase: 2641/6136 - datum van uitgifte:
> 02/27/13
>
>

Vic Rosenthal

Re: K3 mods by I7SWX

In reply to this post by I7SWX

I have a hard time not wanting to make my K3 be "in the top 0.1%!"

Practically speaking, I would never experience the improved MDS that was reported because
I live in the middle of town, with neighbors a few feet away on all sides. Man-made noises
mask receiver noise on all bands most of the time (except perhaps on 6m). In other words,
the stock K3 is better than my QTH. I couldn't use a Maserati on the freeway here, either.

But of course, what about Field Day?

On 3/1/2013 5:40 AM, Giancarlo Moda wrote:

>
> 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.
>
>
> Certainly these are not mods for "normal" user, but those "looking for the hair in the egg" any little improvement can make a difference.
>
> Please let me explain how the idea to modify the K3 started. I have dome mods for many commercial equipments from the 70's to the beginning of this century.
>
>
> I was very curious to see if it could be possible to squeeze out some additional performances from the K3. Certainly, I was not expecting any "flashing results" like obtained on the above equipment. I discovered that the K3 had a removable mixer... what a chance, a way to fiddle with a nice system without going to impair a warranty or damage the radio.
>
> One Italiam OM, IT9BLB, of well known Contest stations IT9BLB, IH9P and IR9Y, told me that they had some difficulties to copy week station with the K3 while their modified FT1000MP (more complex mods) was making easier the copy. That pushed me to do a trial and I went ahead with my friend Sergio, IK8TNG. From what we thought interesting results we designed a swappable H-Mode Mixer and made it available assembled and tested to operators without the need to use a soldering iron. Then I studied some additional changes, experimented already in all the other modified radio.
>
>
> If you do really like to see changes, and you have no money for a K3 but you possess a K2, then you will need to use a soldering iron and apply similar mods to it. The problem is space availaibility.
>
> You asked Elecraft "Are there any plans in the near future to build a new mixer module with this technology? " I am not the one to answer, but I do not see any problem why Elecraft could not use the H-Mode Mixer in their expected (?) new "K4" in the 2 transformer I7SWX configuration or in the original 3 transformer G3SBI, using the FST3125 or the FSA3157 switches.
>
> Note for Eric and Wayne, my configuration is available for you, I will request only a few million $$$$$ ... hi
>
> The H-Mode Mixer is in the public dominium, probably the only "legal" aspect is reference to the inventor, G3SBI, and maybe to me for the 2 transformer one.
>
>
> Best 73
>
> Gian
> I7SWX
>
>
> Message: 17
> Date: Thu, 28 Feb 2013 13:00:12 -0800
> From: Wayne Burdick <[hidden email]>
> To: "Twan at pa0kv.nl" <[hidden email]>
> Cc: [hidden email]
> Subject: Re: [Elecraft] K3 mods by I7SWX
> Message-ID: <[hidden email]>
> 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 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,
> Wayne
> N6KR
>
> On Feb 28, 2013, at 12:33 PM, Twan at pa0kv.nl wrote:
>
>> 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;
>> - 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 <[hidden email]>
> To: [hidden email]
> Subject: Re: [Elecraft] K3 mods by I7SWX
> Message-ID: <[hidden email]>
> 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
>
>

--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/

______________________________________________________________
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Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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tnnyswy

Re: K3 mods by I7SWX

In reply to this post by I7SWX

Is this a sales pitch to Elecraft, or just to interested parties?
Or, could it be directed at both?
Not in any way discounting the mods, just wondering.

((((73)))) Milverton.

>________________________________
> From: Giancarlo Moda <[hidden email]>
>To: "[hidden email]" <[hidden email]>
>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.
>
>
>Certainly these are not mods for "normal" user, but those "looking for the hair in the egg" any little improvement can make a difference.
>
>Please let me explain how the idea to modify the K3 started. I have dome mods for many commercial equipments from the 70's to the beginning of this century.
>
>
>I was very curious to see if it could be possible to squeeze out some additional performances from the K3. Certainly, I was not expecting any "flashing results" like obtained on the above equipment. I discovered that the K3 had a removable mixer... what a chance, a way to fiddle with a nice system without going to impair a warranty or damage the radio.
>
>One Italiam OM, IT9BLB, of well known Contest stations IT9BLB, IH9P and IR9Y, told me that they had some difficulties to copy week station with the K3 while their modified FT1000MP (more complex mods) was making easier the copy. That pushed me to do a trial and I went ahead with my friend Sergio, IK8TNG. From what we thought interesting results we designed a swappable H-Mode Mixer and made it available assembled and tested to operators without the need to use a soldering iron. Then I studied some additional changes, experimented already in all the other modified radio.
>
>
>If you do really like to see changes, and you have no money for a K3 but you possess a K2, then you will need to use a soldering iron and apply similar mods to it. The problem is space availaibility.
>
>You asked Elecraft "Are there any plans in the near future to build a new mixer module with this technology? " I am not the one to answer, but I do not see any problem why Elecraft could not use the H-Mode Mixer in their expected (?) new "K4" in the 2 transformer I7SWX configuration or in the original 3 transformer G3SBI, using the FST3125 or the FSA3157 switches.
>
>Note for Eric and Wayne, my configuration is available for you, I will request only a few million $$$$$ ... hi
>
>The H-Mode Mixer is in the public dominium, probably the only "legal" aspect is reference to the inventor, G3SBI, and maybe to me for the 2 transformer one.
>
>
>Best 73
>
>Gian
>I7SWX
>
>
>Message: 17
>Date: Thu, 28 Feb 2013 13:00:12 -0800
>From: Wayne Burdick <[hidden email]>
>To: "Twan at pa0kv.nl" <[hidden email]>
>Cc: [hidden email]
>Subject: Re: [Elecraft] K3 mods by I7SWX
>Message-ID: <[hidden email]>
>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 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,
>Wayne
>N6KR
>
>On Feb 28, 2013, at 12:33 PM, Twan at pa0kv.nl wrote:
>
>> 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;
>> - 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 <[hidden email]>
>To: [hidden email]
>Subject: Re: [Elecraft] K3 mods by I7SWX
>Message-ID: <[hidden email]>
>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.
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>Help: http://mailman.qth.net/mmfaq.htm
>Post: mailto:[hidden email]
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
>
>
>

I7SWX

Re: K3 mods by I7SWX

Hi Milverton,

I am not sure about your question, sorry.

It is not a pitch to Elecraft, if I understand what you are asking for. I am not doing business but enjoying fiddling with radio... certainly we have to recuperate the investment and cover the assembler job. The kits are available for interested Hams.

Thanks and best 73

Gian
I7SWX

>________________________________
> Da: "[hidden email]" <[hidden email]>
>A: Giancarlo Moda <[hidden email]>; "[hidden email]" <[hidden email]>
>Inviato: Venerdì 1 Marzo 2013 17:56
>Oggetto: Re: [Elecraft] K3 mods by I7SWX
>
>
>Is this a sales pitch to Elecraft, or just to interested parties?
>Or, could it be directed at both?
>Not in any way discounting the mods, just wondering.
>
>((((73)))) Milverton.
>
>
>
>
>
>
>
>>________________________________
>> From: Giancarlo Moda <[hidden email]>
>>To: "[hidden email]" <[hidden email]>
>>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.
>>
>>
>>Certainly these are not mods for "normal" user, but those "looking for the hair in the egg" any little improvement can make a difference.
>>
>>Please let me explain how the idea to modify the K3 started. I have dome mods for many commercial equipments from the 70's to the beginning of this century.
>>
>>
>>I was very curious to see if it could be possible to squeeze out some additional performances from the K3. Certainly, I was not expecting any "flashing results" like obtained on the above equipment. I discovered that the K3 had a removable mixer... what a chance, a way to fiddle with a nice system without going to impair a warranty or damage the radio.
>>
>>One Italiam OM, IT9BLB, of

well known Contest stations IT9BLB, IH9P and IR9Y, told me that they had some difficulties to copy week station with the K3 while their modified FT1000MP (more complex mods) was making easier the copy. That pushed me to do a trial and I went ahead with my friend Sergio, IK8TNG. From what we thought interesting results we designed a swappable H-Mode Mixer and made it available assembled and tested to operators without the need to use a soldering iron. Then I studied some additional changes, experimented already in all the other modified radio.
>>
>>
>>If you do really like to see changes, and you have no money for a K3 but you possess a K2, then you will need to use a soldering iron and apply similar mods to it. The problem is space availaibility.
>>
>>You asked Elecraft "Are there any plans in the near future to build a new mixer module with this technology? " I am not the one to answer, but I do not see any problem
why Elecraft could not use the H-Mode Mixer in their expected (?) new "K4" in the 2 transformer I7SWX configuration or in the original 3 transformer G3SBI, using the FST3125 or the FSA3157 switches.

>>
>>Note for Eric and Wayne, my configuration is available for you, I will request only a few million $$$$$ ... hi
>>
>>The H-Mode Mixer is in the public dominium, probably the only "legal" aspect is reference to the inventor, G3SBI, and maybe to me for the 2 transformer one.
>>
>>
>>Best 73
>>
>>Gian
>>I7SWX
>>
>>
>>Message: 17
>>Date: Thu, 28 Feb 2013 13:00:12 -0800
>>From: Wayne Burdick <[hidden email]>
>>To: "Twan at pa0kv.nl" <[hidden email]>
>>Cc: [hidden email]
>>Subject: Re: [Elecraft] K3 mods by I7SWX
>>Message-ID: <[hidden email]>
>>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 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,
>>Wayne
>>N6KR
>>
>>On Feb 28, 2013, at 12:33 PM, Twan at pa0kv.nl wrote:
>>
>>> 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;
>>> - 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 <[hidden email]>
>>To: [hidden email]
>>Subject: Re: [Elecraft] K3 mods by I7SWX
>>Message-ID: <[hidden email]>
>>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.
>>______________________________________________________________
>>Elecraft mailing list
>>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>Help: http://mailman.qth.net/mmfaq.htm
>>Post: mailto:[hidden email]
>>
>>This list hosted by: http://www.qsl.net
>>Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>>
>
>

n7ws

Re: K3 mods by I7SWX

It's the second mixer that needs improvement.

Wes N7WS

--- On Fri, 3/1/13, Giancarlo Moda <[hidden email]> wrote:

From: Giancarlo Moda <[hidden email]>
Subject: Re: [Elecraft] K3 mods by I7SWX
To: "[hidden email]" <[hidden email]>, "[hidden email]" <[hidden email]>
Date: Friday, March 1, 2013, 10:18 AM

Hi Milverton,

I am not sure about your question, sorry.

It is not a pitch to Elecraft, if I understand what you are asking for. I am not doing business but enjoying fiddling with radio... certainly we have to recuperate the investment and cover the assembler job. The kits are available for interested Hams.

Thanks and best 73

Gian
I7SWX

Are these mods really a major improvement? (Are is it 'crap'..)

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

I7SWX

Re: K3 mods by I7SWX

Hi Wes,

thanks for your note.

Yes, it is the second mixer that needs improvement. I have the mods on paper and we are waiting for a volunteer to lend us a K3 for some time ... this will need soldering work...hi

I will keep you posted once tested

73

Gian
I7SWX

>________________________________
> Da: Wes Stewart <[hidden email]>
>A: "[hidden email]" <[hidden email]>; "[hidden email]" <[hidden email]>; Giancarlo Moda <[hidden email]>
>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 <[hidden email]> wrote:
>
>
>>From: Giancarlo Moda <[hidden email]>
>>Subject: Re: [Elecraft] K3 mods by I7SWX
>>To: "[hidden email]" <[hidden email]>, "[hidden email]" <[hidden email]>
>>Date: Friday, March 1, 2013, 10:18 AM
>>
>>
>>Hi Milverton,
>>
>>I am not sure about your question, sorry.
>>
>>It is not a pitch to Elecraft, if I understand what you are asking for. I am not doing business but enjoying fiddling with radio... certainly we have to recuperate the investment and cover the assembler job. The kits are available for interested

Hams.

>>
>>Thanks and best 73
>>
>>Gian
>>I7SWX
>>
>>
>>
>>
>>
>>>________________________________
>>> Da: "[hidden email]" <[hidden email]>
>>>A: Giancarlo Moda <[hidden email]>; "[hidden email]" <[hidden email]>
>>>Inviato: Venerdì 1 Marzo 2013 17:56
>>>Oggetto: Re: [Elecraft] K3 mods by I7SWX
>>>
>>>
>>>Is this a sales pitch to Elecraft, or just to interested parties?
>>>Or, could it be directed at both?
>>>Not in any way

discounting the mods, just wondering.

>>>
>>>((((73)))) Milverton.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>________________________________
>>>> From: Giancarlo Moda <[hidden email]>
>>>>To: "[hidden email]" <[hidden email]>
>>>>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.

>>>>
>>>>
>>>>Certainly these are not mods for "normal" user, but those "looking for the hair in the egg" any little improvement can make a difference.
>>>>
>>>>Please let me explain how the idea to modify the K3 started. I have dome mods for many commercial equipments from the 70's to the beginning of this century.
>>>>
>>>>
>>>>I was very curious to see if it could be possible to squeeze out some additional performances from the K3. Certainly, I was not expecting any "flashing results" like obtained on the above equipment. I discovered that the K3 had a removable mixer... what a chance, a way to fiddle with a nice system without going to impair a warranty or damage the radio.
>>>>
>>>>One Italiam OM, IT9BLB, of
>>well known Contest stations IT9BLB, IH9P and IR9Y, told me that they had some difficulties to copy

week station with the K3 while their modified FT1000MP (more complex mods) was making easier the copy. That pushed me to do a trial and I went ahead with my friend Sergio, IK8TNG. From what we thought interesting results we designed a swappable H-Mode Mixer and made it available assembled and tested to operators without the need to use a soldering iron. Then I studied some additional changes, experimented already in all the other modified radio.
>>>>
>>>>
>>>>If you do really like to see changes, and you have no money for a K3 but you possess a K2, then you will need to use a soldering iron and apply similar mods to it. The problem is space availaibility.
>>>>
>>>>You asked Elecraft "Are there any plans in the near future to build a new mixer module with this technology? " I am not the one to answer, but I do not see any problem
>>why Elecraft could not use the H-Mode Mixer in their
expected (?) new "K4" in the 2 transformer I7SWX configuration or in the original 3 transformer G3SBI, using the FST3125 or the FSA3157 switches.

>>>>
>>>>Note for Eric and Wayne, my configuration is available for you, I will request only a few million $$$$$ ... hi
>>>>
>>>>The H-Mode Mixer is in the public dominium, probably the only "legal" aspect is reference to the inventor, G3SBI, and maybe to me for the 2 transformer one.
>>>>
>>>>
>>>>Best 73
>>>>
>>>>Gian
>>>>I7SWX
>>>>
>>>>
>>>>Message: 17
>>>>Date: Thu, 28 Feb 2013 13:00:12 -0800
>>>>From: Wayne Burdick <[hidden email]>
>>>>To: "Twan at pa0kv.nl" <[hidden email]>
>>>>Cc: [hidden email]
>>>>Subject: Re: [Elecraft] K3 mods by I7SWX
>>>>Message-ID: <[hidden email]>
>>>>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 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,
>>>>Wayne
>>>>N6KR
>>>>
>>>>On Feb

28, 2013, at 12:33 PM, Twan at pa0kv.nl wrote:

>>>>
>>>>> 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;
>>>>> - 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 <[hidden email]>
>>>>To: [hidden email]
>>>>Subject: Re: [Elecraft] K3 mods by I7SWX
>>>>Message-ID: <[hidden email]>
>>>>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.

>>>>______________________________________________________________
>>>>Elecraft mailing list
>>>>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>Help: http://mailman.qth.net/mmfaq.htm
>>>>Post: mailto:[hidden email]
>>>>
>>>>This list hosted by: http://www.qsl.net
>>>>Please help support this email list: http://www.qsl.net/donate.html
>>>>
>>>>
>>>>
>>>
>>>
>>______________________________________________________________
>>Elecraft mailing list
>>Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>Help: http://mailman.qth.net/mmfaq.htm
>>Post: mailto:[hidden email]
>>
>>This list hosted by: http://www.qsl.net
>>Please help support this email list: http://www.qsl.net/donate.html
>>
>
>

Twan at pa0kv.nl

Re: K3 mods by I7SWX

In reply to this post by I7SWX

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:[hidden email]
To: Giancarlo Moda<[hidden email]>, "[hidden email]"
<[hidden email]>
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID:
<[hidden email]>
Content-Type: text/plain; charset=iso-8859-1

Is this a sales pitch to Elecraft, or just to interested parties?
Or, could it be directed at both?
Not in any way discounting the mods, just wondering.

((((73)))) Milverton.

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M Cresap

Re: K3 mods by I7SWX

In reply to this post by I7SWX

Are there any test results available for the other mods suggested in Gian's paper?

Thanks

73, Mike, W3IP

Sent from my iPhone

On Mar 1, 2013, at 1:22 PM, Giancarlo Moda <[hidden email]> wrote:

> Hi Wes,
>
> thanks for your note.
>
> Yes, it is the second mixer that needs improvement. I have the mods on paper and we are waiting for a volunteer to lend us a K3 for some time ... this will need soldering work...hi
>
> I will keep you posted once tested
>
> 73
>
> Gian
> I7SWX
>
>
>
>
>
>> ________________________________
>> Da: Wes Stewart <[hidden email]>
>> A: "[hidden email]" <[hidden email]>; "[hidden email]" <[hidden email]>; Giancarlo Moda <[hidden email]>
>> 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 <[hidden email]> wrote:
>>
>>
>>> From: Giancarlo Moda <[hidden email]>
>>> Subject: Re: [Elecraft] K3 mods by I7SWX
>>> To: "[hidden email]" <[hidden email]>, "[hidden email]" <[hidden email]>
>>> Date: Friday, March 1, 2013, 10:18 AM
>>>
>>>
>>> Hi Milverton,
>>>
>>> I am not sure about your question, sorry.
>>>
>>> It is not a pitch to Elecraft, if I understand what you are asking for. I am not doing business but enjoying fiddling with radio... certainly we have to recuperate the investment and cover the assembler job. The kits are available for interested
> Hams.
>>>
>>> Thanks and best 73
>>>
>>> Gian
>>> I7SWX
>>>
>>>
>>>
>>>
>>>
>>>> ________________________________
>>>> Da: "[hidden email]" <[hidden email]>
>>>> A: Giancarlo Moda <[hidden email]>; "[hidden email]" <[hidden email]>
>>>> Inviato: Venerdì 1 Marzo 2013 17:56
>>>> Oggetto: Re: [Elecraft] K3 mods by I7SWX
>>>>
>>>>
>>>> Is this a sales pitch to Elecraft, or just to interested parties?
>>>> Or, could it be directed at both?
>>>> Not in any way
> discounting the mods, just wondering.
>>>>
>>>> ((((73)))) Milverton.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>> ________________________________
>>>>> From: Giancarlo Moda <[hidden email]>
>>>>> To: "[hidden email]" <[hidden email]>
>>>>> 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.
>>>>>
>>>>>
>>>>> Certainly these are not mods for "normal" user, but those "looking for the hair in the egg" any little improvement can make a difference.
>>>>>
>>>>> Please let me explain how the idea to modify the K3 started. I have dome mods for many commercial equipments from the 70's to the beginning of this century.
>>>>>
>>>>>
>>>>> I was very curious to see if it could be possible to squeeze out some additional performances from the K3. Certainly, I was not expecting any "flashing results" like obtained on the above equipment. I discovered that the K3 had a removable mixer... what a chance, a way to fiddle with a nice system without going to impair a warranty or damage the radio.
>>>>>
>>>>> One Italiam OM, IT9BLB, of
>>> well known Contest stations IT9BLB, IH9P and IR9Y, told me that they had some difficulties to copy
> week station with the K3 while their modified FT1000MP (more complex mods) was making easier the copy. That pushed me to do a trial and I went ahead with my friend Sergio, IK8TNG. From what we thought interesting results we designed a swappable H-Mode Mixer and made it available assembled and tested to operators without the need to use a soldering iron. Then I studied some additional changes, experimented already in all the other modified radio.
>>>>>
>>>>>
>>>>> If you do really like to see changes, and you have no money for a K3 but you possess a K2, then you will need to use a soldering iron and apply similar mods to it. The problem is space availaibility.
>>>>>
>>>>> You asked Elecraft "Are there any plans in the near future to build a new mixer module with this technology? " I am not the one to answer, but I do not see any problem
>>> why Elecraft could not use the H-Mode Mixer in their
> expected (?) new "K4" in the 2 transformer I7SWX configuration or in the original 3 transformer G3SBI, using the FST3125 or the FSA3157 switches.
>>>>>
>>>>> Note for Eric and Wayne, my configuration is available for you, I will request only a few million $$$$$ ... hi
>>>>>
>>>>> The H-Mode Mixer is in the public dominium, probably the only "legal" aspect is reference to the inventor, G3SBI, and maybe to me for the 2 transformer one.
>>>>>
>>>>>
>>>>> Best 73
>>>>>
>>>>> Gian
>>>>> I7SWX
>>>>>
>>>>>
>>>>> Message: 17
>>>>> Date: Thu, 28 Feb 2013 13:00:12 -0800
>>>>> From: Wayne Burdick <[hidden email]>
>>>>> To: "Twan at pa0kv.nl" <[hidden email]>
>>>>> Cc: [hidden email]
>>>>> Subject: Re: [Elecraft] K3 mods by I7SWX
>>>>> Message-ID: <[hidden email]>
>>>>> 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 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,
>>>>> Wayne
>>>>> N6KR
>>>>>
>>>>> On Feb
> 28, 2013, at 12:33 PM, Twan at pa0kv.nl wrote:
>>>>>
>>>>>> 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;
>>>>>> - 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 <[hidden email]>
>>>>> To: [hidden email]
>>>>> Subject: Re: [Elecraft] K3 mods by I7SWX
>>>>> Message-ID: <[hidden email]>
>>>>> 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.
>>>>> ______________________________________________________________
>>>>> Elecraft mailing list
>>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>>> Post: mailto:[hidden email]
>>>>>
>>>>> This list hosted by: http://www.qsl.net
>>>>> Please help support this email list: http://www.qsl.net/donate.html
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Bill Clarke

Re: K3 mods by I7SWX

Mods on paper and needs a K3 to test them on? Really?

Perhaps I read the message incorrectly?

Bill W2BLC

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N0AZZ

Re: K3 mods by I7SWX

I guess that I misread that post also, not what I got out of it.

73,
Fred/N0AZZ

K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100
P3/SVGA--KPA500--KAT500--W2

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Bill Clarke
Sent: Monday, March 18, 2013 1:34 PM
To: [hidden email]
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

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-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2904 / Virus Database: 2641/6185 - Release Date: 03/17/13

-----
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Checked by AVG - www.avg.com
Version: 2013.0.2904 / Virus Database: 2641/6185 - Release Date: 03/17/13

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