[Elecraft] K3 mods by I7SWX
M Cresap
m.cresap at yahoo.com
Mon Mar 18 14:13:53 EDT 2013
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 <i7swx at yahoo.com> 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 <n7ws at yahoo.com>
>> A: "tnnyswy at yahoo.com" <tnnyswy at yahoo.com>; "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>; Giancarlo Moda <i7swx at 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 <i7swx at yahoo.com> wrote:
>>
>>
>>> From: Giancarlo Moda <i7swx at yahoo.com>
>>> Subject: Re: [Elecraft] K3 mods by I7SWX
>>> To: "tnnyswy at yahoo.com" <tnnyswy at yahoo.com>, "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
>>> 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: "tnnyswy at yahoo.com" <tnnyswy at yahoo.com>
>>>> A: Giancarlo Moda <i7swx at yahoo.com>; "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
>>>> 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 <i7swx at yahoo.com>
>>>>> To: "elecraft at mailman.qth.net" <elecraft at 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.
>>>>>
>>>>>
>>>>> 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 <n6kr at elecraft.com>
>>>>> To: "Twan at pa0kv.nl" <pa0kv at pa0kv.nl>
>>>>> Cc: elecraft at mailman.qth.net
>>>>> Subject: Re: [Elecraft] K3 mods by I7SWX
>>>>> Message-ID: <461DACC5-6AAE-49D4-8C8A-B93DAB3B6AAE at 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 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 <keith at kathyandkeith.mx>
>>>>> To: elecraft at mailman.qth.net
>>>>> Subject: Re: [Elecraft] K3 mods by I7SWX
>>>>> Message-ID: <1362087123842-7570520.post at n2.nabble.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.
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