With this post we’ll finish up our Simple Spectrum Analyzer and draw up some conclusions based on it’s overall testing and construction. Here’s the noise amplifier I’ll use as an input source which was shown in an earlier post. This is good up to approx. 30MHz or so…
And below our analyzer’s output with this source. Note: were looking at an approx. 6MHz to 11MHz frequency span
I also promised a simple Log amplifier for the project which I’ll leave up to the reader to implement if desired.
So to wrap it up I think this project would be better suited as a core of a nice little single conversion AM receiver. Add a ‘386 amplifier, manual tuning pots and maybe a BFO and it would be a nice addition for the bench. Choose your band of interest and there you go…Enclosure worthy? I’ll leave that thought up to you. Come to think of it I may well do those additions myself!
Next time I’ll be revisiting a previous project that IS in need of a good sprucing up…and that is our Hobby Spectrum Analyzer!