[amsat-bb] Re: down converter

Greg D. ko6th_greg at hotmail.com
Sun Mar 22 16:03:51 PDT 2009

Or modify one.

I wanted an IF in the 300 mHz range, so that I wouldn't have to worry about interference from either a 2m or 70cm uplink.  I'm using an ICOM R-7000 all mode scanner for the IF receiver, so the odd frequency isn't a problem.  It was a fairly simple matter to swap crystals on a Drake 2880 and change out one cap, to move the local oscillator to 2100 mHz.  That puts our 2401.x mHz downlinks at 301.x  You might be able to push it far enough to get to 435.  You'd need to get the LO down to 7,679.69 kHz (7.68 mHz), if my calculations are correct.

Greg  KO6TH

> From: marsgal42 at hotmail.com
> To: amsat-bb at amsat.org
> Date: Sun, 22 Mar 2009 15:11:08 -0700
> Subject: [amsat-bb] Re: down converter
> KC9MLN asked:
> > Where and how do i get a down converter from 2.4 to 435 mhz?
> Make one. The bits and pieces are all off-the-shelf components and modules.
> Laura Halliday VE7LDH     "Que les nuages soient notreGrid: CN89mg                       pied a terre..."ICBM: 49 16.05 N 122 56.92 W     - Hospital/Shafte

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