Archive for March, 2010

Security Camera Repair

March 28th, 2010 No comments

Unsuspecting security camera

Well, as a (perhaps welcome ;)) deviation from the spectrum analyzer posts, I’ve spent a little time working on repairing a security camera I’ve been hanging onto for a while.  I’ve been toying with the idea of installing it near the radio control flying field as someone in the club knows the owner of a nearby business.

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Spectrum Analyzer IF Amplifier

March 28th, 2010 No comments

IF Amplifier cooling down

I’ve decided to hold off posting spectrum analyzer modules until they’re complete.  I’ve been collecting tons of pictures along the way, so hopefully the post for each module will be interesting and visually appealing.  With that in mind, I can’t post about any of the modules with the exception of this one.   Read more…

Spectrum Analyzer Mixers

March 26th, 2010 No comments

Mixer 2 completed and verified against schematic

I’ve verified each of the 3 mixers that I need for the spectrum analyzer.  The one above is mixer 2.  The schematic for this mixer is available from Scotty’s site. Read more…

“Scotty’s Spectrum Analyzer”

March 22nd, 2010 No comments

IMPORTANT!!  — I’ve made a special page for my construction and testing of the spectrum analyzer.  It’s available on the navigation bar below the blog title banner, or here.

A while back I bought a spectrum analyzer kit.  It can display waveforms in the frequency domain from 0 to 1000 Mhz.  I haven’t worked on it for a while, but I’ve decided to start working on it again.  If you’re interested in more information, there is a webpage for the analyzer by the guy who designed it, and there’s a Yahoo group, also. If you’re really-really interested there is a group buy open (until the 28th of march 2010) here.  Anyway, I’m sure it’s of limited use to my usual readers (thanks, friends & family! [oh who am I kidding, most of my family doesn’t read this 😉 ]), but it may be useful to others working on the kit.  I’ll post the “annotated” CAD images for each board here, and add images of the completed boards when I finish them.  Who knows, it may be interesting for someone.  Also, I’ll include my thoughts and observations while building these boards.  Finally, not all the boards that come with the kit include annotated layouts, so I’ll have to dig around and figure out what they do and what to put on them 😉 Read more…