Re: [amsat-bb] Mode-S signal source from a 6 meter TX and a clipping diode?

[Jim Sanford <wb4gcs@xxxxxxxxx>]

I use a 40mhz TCXO that somebody gave me.  Has an SMA output connector. 
Took a piece of rigid coax and turned it into a 2.4GHZ groundplane. 
Have to carry it a block and a half down the street to get the signal
low enough to do any meaningful antenna/preamp comparisons.

GOod luck!
73,
Jim
wb4gcs@amsat.org



Mikek wrote:
> 
> Greetings
> Some good design tips for such a multiplier are in the International
> Microwave Handbook - the design in that case was a 1.2ghz weak signal
> source.  Easier than the 6m rig would be to get hold of a 24mhz or
> 100mhz computer clock oscillator and tie the output to a MMIC such
> as a MAR6 or similar.  The combination of the harmonic rich output
> of the oscillator driving the MMIC hard will generate a nice comb
> of frequencies - attach a quarter wave hunk of wire and away you
> go.
> 
> 73 de AA9IL
> Mike
> 
> > Hi,
> >
> > I remember seeing, somewhere, a very simple way to get a signal
> source as
> > mentioned in the subject.  As I recall, besides the obvious protective
> > attenuation, it was nothing more than a good rf diode and a resistor
> in
> > series.  I came up empty on Google, and wonder if anyone recalls the
> source
> > of this tip, and the details.
> >
> >
> > Alan
> > WA4SCA
> >
> >
> >
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> 
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