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 <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-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 <ke...@kathyandkeith.mx>
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 mods by I7SWX
Message-ID: <1362087123842-7570520.p...@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
--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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