Re: K2: An old filter question - - "the underwater noise"

[Geoffrey Mackenzie-Kennedy]

Duane,
 
Can you remember the web-site of this K2 owner?
 
73,
Geoff.
GM4ESD
 
 
dw <[hidden email]> wrote on Tuesday, January 19, 2010 at 5:50 PM:

> Hi Gang,
> I searched the archives but couldn't find anything on this question.
> A few days ago I browsed into a web-site where a K2 owner described what
> looked like a modified grounding scheme for the crystal filter cans,
> saying that it reduced or eliminated what was described as "underwater
> noise"
>
> The article showed grounding strips bridging all of the crystal cans
> together, and I think there was a couple of filter caps added.
>
> Does anyone know if this grounding scheme was ever considered seriously
> as an addition to the standard K2 building process?
>
> Thanks
> Duane

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[K1LI]

http://www.rt66.com/~hypoxic/K2stuff/ultreject.html

On Tue, Jan 19, 2010 at 2:08 PM, Geoffrey Mackenzie-Kennedy <
[hidden email]> wrote:

> Duane,
>
> Can you remember the web-site of this K2 owner?
>
> 73,
> Geoff.
> GM4ESD
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[Guy, K2AV]

This modification is from 2001.  I bought a rev A mainboard K2, #1239.
 At some point I did all the A/B mods including xtal replacement to
get me to the equivalent of a rev B board. It accomplished the same
thing as the new board.  If this is in reference to buying a new K2,
this is long-ago dealt with.

I originally had the shape pictured in the web page, but after all the
mods the "tail" was gone. I don't recall doing that "bar wire" in the
mods but when all was done it didn't seem necessary.

A late serial K2 is a very polished design with an incredible amount
of user input over a decade.

If you can get an old one, you can gradually mod it up to the present
with parts kits you can still get from Elecraft. You will even get to
wind some toroids doing an A/B mod and get some mojo to spruce up your
shack ambience.

73, Guy.

On Tue, Jan 19, 2010 at 2:55 PM, Brian Machesney <[hidden email]> wrote:

> http://www.rt66.com/~hypoxic/K2stuff/ultreject.html
>
> On Tue, Jan 19, 2010 at 2:08 PM, Geoffrey Mackenzie-Kennedy <
> [hidden email]> wrote:
>
>> Duane,
>>
>> Can you remember the web-site of this K2 owner?
>>
>> 73,
>> Geoff.
>> GM4ESD
> ______________________________________________________________
> 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
>

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