INRAD will be soon making custom RX filters for the K2?

[Fred (FL)]

Did anything ever become of the idea of "INRAD will be
soon making custom RX filters for the K2"?

I saw this concluding remark, in an article on
Elecraft site, about K2.

Maybe it was a rumor, wishful thinking, or
didn't make sense to INRAD.

Fred, N3CSY


 
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[Vic K2VCO]

Fred (FL) wrote:
> Did anything ever become of the idea of "INRAD will be
> soon making custom RX filters for the K2"?
>
> I saw this concluding remark, in an article on
> Elecraft site, about K2.
>
> Maybe it was a rumor, wishful thinking, or
> didn't make sense to INRAD.

INRAD did make a few 400Hz CW filters for evaluation purposes. I have
one -- but not in my K2!

The filter had great characteristics when measured on stand-alone
equipment. But I (and others) didn't succeed in installing it in the K2
without there being too much leakage around the filter.

I tried using a cut-down ssb board to switch it in and out. Way too much
leakage, so then I simply connected it to the headers used for the ssb
board. I even made little hoods for the coax jumpers to eliminate that
leakage path. Not good enough.  And of course, without switching it was
only possible to have one bandwidth (although I did set it up for
discrete passband tuning).

The problem was likely due to grounding issues. I did try various things
suggested by Wayne, Eric and George, W2JVN (who was the owner of INRAD
at the time), but I could not get good enough ultimate rejection to make
it worthwhile.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[Tom Hammond-3]

Hi Fred:

A number of years ago, Inrad DID made a few 'test' filters for the
K2, but, unfortunately, I don't believe anyone was ever able to
install them without excessive signal blow-by. As a result, the
project was halted.

73,

Tom Hammond   N0SS

At 10:22 PM 3/17/2007, Fred (FL) wrote:

>Did anything ever become of the idea of "INRAD will be
>soon making custom RX filters for the K2"?
>
>I saw this concluding remark, in an article on
>Elecraft site, about K2.
>
>Maybe it was a rumor, wishful thinking, or
>didn't make sense to INRAD.
>
>Fred, N3CSY
>
>
>
>____________________________________________________________________________________
>It's here! Your new message!
>Get new email alerts with the free Yahoo! Toolbar.
>http://tools.search.yahoo.com/toolbar/features/mail/
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com

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