Big Monk
Well-known member
I’ve been troubleshooting some noise issues on my board. I was getting some digital “whine” from one of my non-isolated power supplies so I swapped it for a Mosky ISO-10. That squashed the whine for the most part but I was still get a high frequency noise out of the board.
Full disclosure: I tested my direct to amp connection and the pedalboard is certainly added some noise but I chalk that up to slight EM interference from the transformers in the Mosky. Definitely nothing crazy and I was happy to squelch most of the “whine”.
So I thought about returning the Mosky because I assumed it was another case of a cheap supply being non-isolated. Turns out, however, that it does in fact have complete ground and output isolation via 2 transformers in the unit.
I decided to to use process of elimination to isolate the noise. At first it appeared to be coming from my Strymon Flint but it was actually my Aion Ares EP Pre which is directly after the Flint in my chain. After migrating the Ares to my non-isolated Otraki Power brick with my other drive/fuzz pedals, the last bit of “whine” disappeared.
So, short story long, I’m thinking that it might have been the charge pump injecting noise into the supply it previously shared with my digital stuff. Since I have an IC Socket in the Ares, I may pull the charge pump and test it on a direct 18v feed.
My question is this: which pins on the IC socket need to be jumpered to bypass the charge pump circuit for 9v DC out?
Full disclosure: I tested my direct to amp connection and the pedalboard is certainly added some noise but I chalk that up to slight EM interference from the transformers in the Mosky. Definitely nothing crazy and I was happy to squelch most of the “whine”.
So I thought about returning the Mosky because I assumed it was another case of a cheap supply being non-isolated. Turns out, however, that it does in fact have complete ground and output isolation via 2 transformers in the unit.
I decided to to use process of elimination to isolate the noise. At first it appeared to be coming from my Strymon Flint but it was actually my Aion Ares EP Pre which is directly after the Flint in my chain. After migrating the Ares to my non-isolated Otraki Power brick with my other drive/fuzz pedals, the last bit of “whine” disappeared.
So, short story long, I’m thinking that it might have been the charge pump injecting noise into the supply it previously shared with my digital stuff. Since I have an IC Socket in the Ares, I may pull the charge pump and test it on a direct 18v feed.
My question is this: which pins on the IC socket need to be jumpered to bypass the charge pump circuit for 9v DC out?