Re: [amsat-bb] More Microwave Modulation Musings

[kevin schuchmann <kschuchm@xxxxxxxxxxx>]

Well Bob,
    if nothing else it might finally clear some of the cordless phones from
the
surrounding area... hehe
Kevin
wa6fwf

----- Original Message -----
From: "Bob Bruninga" <bruninga@usna.edu>
Cc: <amsat-bb@AMSAT.Org>
Sent: Monday, December 02, 2002 8:22 PM
Subject: [amsat-bb] More Microwave Modulation Musings


> Now I have three good but useless Microwave oven 2.4 GHz killowatt
> transmitters with nothing to do.  WIth all the Sband receivers in AMSAT
> hands, I wonder about this idea...
>
> We all konw they are very broadband and full of 60 Hz splatter, thus
> useless for narrowband modulation...
>
> But broadband simply means that one needs to use a matched broadband
> (think DSP and speread spectrum) receiver.  Now, how to encode
> intellligence?.. Using DSP and you should be able to find a tremendously
> strong 60 Hz component.  (just like everyone else's..)...
>
> But what if you instead ran it on say 66 Hz or 56 Hz or something
> different than 60 Hz, so that your signal could be easily DSP'ed out of
> all the other spectrual lines...  A little ON/OFF keying and you may have
> a nice unique EME transmitter?
>
> Again, I know that taming a Magnetron for narrowsignal is like starting at
> square one.  So that is out of the question, but why not take it as is,
> and figure out a mechanism to configure the wideband signal into something
> that can be recovered by a matched DSP receiver?
>
> How to generate 67 Hz AC at a 1500W for a quick test??  Easy with my
> gasoline generator...
>
> Sorry, I hate to waste good RF transmitters on cooking popcorn..
> Just musing...
> Bob, WB4APR
>
>
>
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