Hans Summers wrote:

See my spectrum analyser:
http://www.hanssummers.com/electroni...yser/index.htm
which has 145MHz 1st IF and covers right up to (and through!) the 1st IF,
using an SA602 VCO covering 145MHz to something like 300MHz with no problem
and apparently excellent linearity. The varicap is BB105. Dynamic range is
limited to something like 70dB by the choice of front end (SA602) but it's a
fun and useful project that is quite easy to build. If anyone wants the
circuit diagram and full construction details let me know.

I very much enjoyed seeing all the photos of your construction and
would like to receive the schematic and details. Thanks.

--
John Popelish