I posted this to see what you all think of it.
https://www.nutsvolts.com/magazine/article/build-a-vintage-radio-sweep-alignment-instrument
https://www.nutsvolts.com/magazine/article/build-a-vintage-radio-sweep-alignment-instrument-part-2#
https://www.nutsvolts.com/magazine/article/build-a-vintage-radio-sweep-alignment-instrument
https://www.nutsvolts.com/magazine/article/build-a-vintage-radio-sweep-alignment-instrument-part-2#
If you want to work with old radios, a sweep generator for IF alignment can be handy. However, today we have mostly digital radios. Also, a lot what gets broadcast over radio has had effects applied to it: https://www.orban.com/radio-audio-processors
Another sweep generator project from Nuts&Volts from 2013, https://www.nutsvolts.com/magazine/article/december2013_Reed. E
