I wanted an analogue sig gen (which only actually means sine waves, for Chladni purposes) so I could adjust it with knobs, I wanted a digital readout, so that meant a counter unit and I needed a power amp to drive the Chladni speaker. With the Bradley sig gen unit no longer available since Don's untimely passing, I thought I'd see if I could put together a unit from kit parts. The problem with commercial signal generators is that a separate amp is required to power the loud speaker, and the frequency control is often via digital buttons rather than the analogue knobs which I prefer. One of the problems with this old unit (apart from the fact that it could cark it at any time) is that it needs a separate device to measure frequency. ![]() ![]() Those who have experienced the 3 day modal tuning course may remember my 1970's era 12kg power supply/sig gen/amp unit, which works sort of fine, but weighs a ton, so is not the best to fly with when I do overseas courses.
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