Hi! I'm fairly new to electronics, but I decided to build this theremin as it seemed really easy. Unfortunately, it's not working, and I don't know why . I read somewhere in this thread that it was important to check the voltages across the output of the regulator, R12, R42, R22 and R23, so this is what I measured:
Output of 78L06: 6.02 V
R12: 0.670 V
R42: 0.452 V
R22: 1.112 V
R23: 1.102 V
I don't know what are the supposed voltages are (except for the output of the regulator, I think that's fine haha), because I'm not really familiar with circuits' analysis yet; are these okay?
I tried to follow the recommended layout as much as I could. Here's some pictures of the circuit:
I put all this in a carton box and connected it to a guitar amplifier, but nothing happened. I tried turning the variable capacitor and modify the lenght of the antenna, but still nothing. I checked the value of capacitors and resistors and I think they are okay, as well as continuity across the circuit.
Thanks in advance for your help, and I'm sorry about my english, it's not my native language .