Dear all,
I just build an effects loop with a couple of LND150's. Not all was going as smooth as normal. I was stupid enough to draw the mosfets backwards in Eagle and place them accordingly (D and S swapped). Turned them around and the recovery stage seems to work fine now (direct guitar in the return path gave a non distorted output).
The problem is with the send side of the loop. A strange 1.4 V p-p slow sinus (or oscillation?; around 10 Hz) is continuously present after the follower. The sound cuts in and out at the same speed.
What could this be? Faulty mosfet, limiter leds, a not working type of bootstrapping or something else?
Schematics are attached. Everything sims fine with ltspice though. The loop I build is the fourth from the top in the ltspice file. I know simulation =/ reality...
I just build an effects loop with a couple of LND150's. Not all was going as smooth as normal. I was stupid enough to draw the mosfets backwards in Eagle and place them accordingly (D and S swapped). Turned them around and the recovery stage seems to work fine now (direct guitar in the return path gave a non distorted output).
The problem is with the send side of the loop. A strange 1.4 V p-p slow sinus (or oscillation?; around 10 Hz) is continuously present after the follower. The sound cuts in and out at the same speed.
What could this be? Faulty mosfet, limiter leds, a not working type of bootstrapping or something else?
Schematics are attached. Everything sims fine with ltspice though. The loop I build is the fourth from the top in the ltspice file. I know simulation =/ reality...