I have a workable Spectrum Analyser which was a Dick Smith Kit based
on a TV tuner front end.
I probably built that about 10 to 15 years ago as an indication of
vintage - maybe longer.
Kit has been defunct for quite some years now. I could dig out details
and circuit diagram refs if of interest. Circuit and manual are liable
to be on the net somewhere.
Also had companion kits of comb generator, white noise source. I also
have those (bought at disposal prices) but hey never got built.

It was interesting to monitor the local then-analog telephone cell
site (900 MHz ish) with the analyser. Motorway nearby. A channel would
pop into service at high amplitude as a car handed in at extreme
range, progressively step down in amplitude as the cell site was
approached, step up again as it passed the site and receded then go to
zero as the site handed off to the next one. Putting the group of
channels to music as traffic passed through would have been
interesting.



      Russell
--=20
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