Bio77

LM1458 is basically a dual 741, and, for example, some people swear the BMPOA won't sound right unless a 741 is in the 2nd IC slot...

It could be a number of things. Maybe the LM1458 has less high frequency content which sounded more pleasing when testing ICs. Maybe...

I was wondering why a LM1458 is used in the Timmy (Tommy III) versus a 4558? My understanding is that it's a stripped down TS, so, why...

Thanks! That makes perfect sense.

And you would definitely want to do that with this setup

I think being that it's for a tele, they assume you're using a metal plate to mount the pots on. So they would both connect to ground...

Hey Guys, I'm installing some new pickups. I have the attached wiring diagram. It seems weird to me that there isn't a ground wire...

You would use the continuity setting on your DMM to see which posts on the switch are connected/not-connected when pressed/not-pressed.

Agree with Erik S, the LED on all the time is the biggest anomaly. Are you are running it at 18V? How are the voltages on your regulator?

Also check that your external momentary switch is the correct type, i.e., normally open versus normally closed.

Looks like the momentary switch in the pedal has 4 terminals? You should use your DMM to figure out what is not-connected/connected in...

Given the time lag to problem, I would check your transistors. They might have come loose from those sockets.

The DM-2 is one of my favorite analog delays. I've built a handful of different versions already. From the aquaboy to the aquaboy...

Gorgeous build! Really dig the aesthetic of this one, white knobs on black is killer.