Single buffer effects loop

[ejendres]

I'm working on a Mojotone 18watt TMB build. This version of the amp has the normal 18watt first channel and a high gain TMB second channel. I don't see myself using the first channel and if I removed it I would have a single 12ax7 triode to use as an effects loop buffer.

Are there any good series loop circuits that utilize a single buffer? Most the ones I've seen use a buffer for send and return.

[ejendres]

Do you guys think something like this would work well?

2025-02-26 13_52_07-Cornford RK100.pdf - Adobe Acrobat Reader (32-bit).png

[JMPGuitars]

I'd try Merlin's effects loop instead. See the attached schematic.

Thanks,
Josh