mmarsh wrote:
The two diodes won't make a difference, but the charge pump might. It seems the previous one had some issues playing well with others on rare occasions.
To elaborate a bit on Mike's comments, the new diodes are the 1N5817 Schottky type, which have a very low forward voltage threshold--only a couple of tenths of a volt at the current levels in this pedal circuit. This keeps the voltage drop minimal on the +18V side of the charge pump. You'll only lose about 0.4V or so vs. the nearly 2V loss with 1N4001's. And the LT1054 charge pump is significantly more robust than the 7660 types; it'll put out more current and doesn't seem to suffer from the compatibility issues that Mike mentioned. I've been using them for a few years now and have yet to have a single problem with the 1054.
_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)
My Website *
My Musical Gear * My DIY Pedals:
Pg.1 -
Pg.2