Use as Panadapter on a K1 Elecraft?

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cottersay
Posts: 9
Joined: Thu Dec 24, 2015 6:07 am

Use as Panadapter on a K1 Elecraft?

Postby cottersay » Thu Dec 24, 2015 6:12 am

Has anyone here tapped into the I.F. of a K1 to attach an SDR for use as a Panadapter? If so, any hints or pointers? :?:

Thank you,

-cottersay
Last edited by cottersay on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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DaveB
Posts: 129
Joined: Sun Feb 01, 2015 6:04 pm

Re: Use as Panadapter on a K1 Elecraft?

Postby DaveB » Thu Dec 24, 2015 2:43 pm

Hi,

You might like to look at this web page http://g4hup.com/PAT.htm

Dave provides a neat little buffer board to interface to SDRs. I got one recently in order to tap off the 1st IF of a Lowe HF-225 receiver. I noted from the web page that he does a board suitable for the Elecraft K1, K2. The boards are different because there is a low-pass-filter on the output. Looking at the Elecraft circuit diagram I would suggest tapping off of pin 4 of the SA602 receive mixer.

You could simply try tapping off of that pin with a low value capacitor - but read have a look at the reference articles embedded in this page. I found it worked quite well with an RTL-dongle but the SDPPlay has the much better dynamic range.

I've only tested phase one - taking a tap from the 1st If - phase 2 is to take the output from before the 1st mixer and use the Lowe HF225 as a super-duper front end with it's more comprehensive set of band-pass filters.

David
Last edited by DaveB on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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