I finished my external effect loop build.
The basic schematic came from one of Merlin Blencowe’s designs. I liked it because it was simple and I saw it got good reviews from others who have tried it.
I did a little tweaking to some values, mostly to just get the levels right but now it works great and is nice and quiet.
I’ve added a simple passive loop (in and out jacks) to a couple amps such as this SLO type amp and it’s just like have the effect loop in the amp. It’s a bunch of wires to get it all hooked up but that’s OK.
It’s a little messy on the inside. It’s built in some sort of old video camera power supply and using one transformer for the HT and a little Radio Shack transformer for the heaters.
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