freestompboxes.org

Guts from this auction:
https://cgi.ebay.com/ws/eBayISAPI.dll?V ... 0580584621

looks pretty solid... single-op for buffer (non-inverting?), could easely be modified as a booster, iso-out via (cheap?) 1:1 trafo. Dual-PowerSupply(+-15V) for OpAmp with DC-DC-Converter, which needs a 7805 in front. and a auto-gnd-lift-circuit?

looks usefull if the 1:1-trafo has some good specifications...

thanks for sharing ag!
here are more pics;
http://sites.google.com/site/skrydstrupbuffer/

regards, kusi

It's R&D, not RGD..

Wow; that is nice of looking at PCB pics: you learn new things every day...........

Never heard about the NMA0515S but that really looks interesting: 5V in, + and -15V out. Sweet!


Nice to see the trimmer is replaced by a jumper; guess that is the difference between their booster and their buffer.