I just assembled the BYOC Analog Vibrato. Before turning it on I plugged my guitar into it, I heard my guitar in the amp, so bypass works. I turn it on, the LED comes on, but now it just squeals noisily (high pitch). The signal from my guitar does not make it to the amp, turning any of the knobs or flipping the ramp switch has no effect. However, adjusting the trimpot marked 474 alters the pitch of the squeal, and adjusting the trimpot marked 204 alters the volume of the squeal. When I adjust the 204 trimpot to half, the squeal becomes INSANELY loud, my amp volume was almost as low as it could have been and still my left ear is numb right now. (before I managed to turn off the amp it also started making a fast wuwuwuwuwwu sound) At the bottom or top of the 202 trimpot sweep, the squeal becomes as quiet as it can go, which is a moderate volume level. I don't understand what the problem is. I double checked all of the resistor values. The transistors and ICs are all facing the right direction. All of the positive leads are in the square holes and so are the black ends of the diodes. And the rest are too simple to mess up, like using the right numbered capacitor, or wiring lug 1 to the hole marked '1'. Do I have a cold joint somewhere? Did I burnout an integrated circuit while I was soldering?(I soldered them while they were in their sockets and it didn't occur to me to put them in later) Does anyone know what could cause this sort of thing to happen? Is the solution as simple as resoldering every single connection on the board with higher heat and my fingers crossed?
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