BouncyBear

so i touched up the solder joints now i have a alarm sound when i turn on the pedal i have a very high frequency hum could it be from...

I was checking resistances and r100 was a 3.3k instead of 4.7k would that effect anything

I got my j201 from eBay how can I tell if they are real

Hi all, im new to pedal building and when i turn on the obsidious preamp pedal it has no sound i was testing it with aligator clips and...