Originally Posted by hypertek
I bought 2 radioshack 470uf 35v caps to replace the included 470uf 25v elna caps, thinking i would have a little more headroom when i connect the system with a 12v or 24v ac adapter (if i run 1 9v or 2 9v) .
But im looking at the Elna cap, could it be higher quality than this radio shack cap?
Yes they are. The Cmoy design regardless of type is limited and therefore hard to mod to provide more headroom, such as driving higher impedance headphones. Generally replacing caps with the same uf rating but move voltage unless it is a tube amp will provide no or very little and unseeable benefits. The only reason why some people mod certain full sized amps replacing with bigger caps is so the amount of power pushed through the system isn't limited by the cap but having more headroom preventing stress on the cap possibly having it bulged or leaking. Certain tube amp's for example my small Bravo v2 tube amp has a DC power input of 24v, the power cap bypassing between the IRL513 (mod) mosfets and the tube itself on the circuit was a 25v rated cap. Theoretically this is enough but since there can be interruptions to power, a 25v cap will have a lot more stress on it then a 35v cap since the power going in is 24v, 1v from the wall, which can damage the circuit or components if a power surge is to happen.
The Banzai moy uses dual 9v rails so therefore 18 in total, and since 25v is the next rated [v] for the cap, it is used has ample amounts of power to flow throughout the amp. Maybe upgrading the ELNA's to a 640uf 25v solid cap may have a little noticeable amount of improvement.
If you are trying to make an AC power adapter for your Cmoy, 12-18v is plenty and sufficient, 24v is unnecessary.
@Willmax, either your pot or your opamp is the problem, have you taken out the JRC opamp and plugged in back into its socket retaining proper notched orientation?
Edited by DefQon - 4/13/12 at 9:28pm