[VHFcontesting] Bought a 24GHz gunnplexer...now what?

[Sean Waite]

Thanks Scott. Looking at the book, it may be simpler than I was thinking. I
was trying to figure out how an IF for the TX frequency worked, when it
seems like you just use a mic and a modulator circuit. The RX side, if I'm
reading this right, let's you work full duplex by acting as a transverter
and mixing with an FM broadcast or 2m frequency (or whatever) to get you
off the TX frequency.

Does anyone know if there is a preferred range for RX on these? I believe
that the diode I have is 24.15GHz, so the transmit side will be there plus
or minus drift. Should I use a 2m radio as IF on RX?

There's not much out there on the band, so I'm just trying to get a feel
for what people actually do.

Sean WA1TE

On Mon, Aug 7, 2017, 01:31 Scott Armstrong <aa5am at vntx.net> wrote:

> Hi Sean,
>
> Google  gunnplexer cookbook
>
> You will find a couple of links to a book written by W4UCH.
>
> Lots of good info in it. The book deals with the 10GHz gunnplexers but the
> theory and operation is the same as the 24GHz units.
>
> 73,
> Scott AA5AM
>
> On Sunday, August 6, 2017, Sean Waite <waisean at gmail.com> wrote:
> > Hi all,
> > I found a radar gun module on ebay with a 24GHz gunnplexer in it. I'd
> love
> > to get some working 24GHz gear for next year. Does anyone have a favorite
> > tutorial on how to do this? I've seen a few sites showing how to use a
> > gunnplexer to create a transmitter, but for whatever reason I just can't
> > wrap my brain around how it is done. I don't know if it is just too
> simple
> > and I'm overthinking it, or if there is some secret thing I'm missing.
> >
> > Any tips would be appreciated. I may also grab another gunn diode and use
> > that one over this, I didn't realize it when I bought it but it appears
> to
> > be a complete pull from a police cruiser. It could be fun to play with.
> >
> > Thanks and 73,
> > Sean WA1TE
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