Hey all, I'm working on a theremin, specifically the beat frequency oscillator, which subtracts out the frequency difference between a variable pitch oscillator and a fixed pitch oscillator. For the fixed pitch oscillator, it just needs to generate an analog 260kHz signal. Can I use a crystal oscillator? Is that cheaper? Is there a better method for this? Want it to be very stable.
This is the document I'm working off of, but it's from the 90s. Pg.3 and 6 have the circuit diagram. https://www.cs.nmsu.edu/~rth/EMTheremin.pdf.
This is the document I'm working off of, but it's from the 90s. Pg.3 and 6 have the circuit diagram. https://www.cs.nmsu.edu/~rth/EMTheremin.pdf.