Search found 3 matches

by dtcicero
Thu Apr 05, 2018 5:54 am
Forum: Build
Topic: Meanwell Single, Bipolar and Triple Output Switching Power Supplies for Audio Projects
Replies: 34
Views: 148208

Re: Meanwell Single, Bipolar and Triple Output Switching Power Supplies for Audio Projects

Thanks for running the tests again! It's a shame the performance is not at least equal to what it's meant to replace. I really like the P25A/GP25A form factor, and no worries with UL or mains.

Dave
by dtcicero
Tue Apr 03, 2018 9:25 pm
Forum: Build
Topic: Meanwell Single, Bipolar and Triple Output Switching Power Supplies for Audio Projects
Replies: 34
Views: 148208

Re: Meanwell Single, Bipolar and Triple Output Switching Power Supplies for Audio Projects

I'm interested in using the GP25A so great to see this info. I checked with Meanwell and the GP25A switching frequency is 65kHz. I also found the GP25A does not perform well unless the +15V output is loaded to at least 100mA. I think your tests showed a 50mA load on the +15V output?

Thanks,
Dave
by dtcicero
Thu Feb 06, 2014 8:50 pm
Forum: Pro Audio Design
Topic: New: A Direct-Coupled Input-Capacitorless Active Mic Preamp
Replies: 142
Views: 378575

Re: New: A Direct-Coupled Input-Capacitorless Active Mic Pre

There's actually a "high end" preamp that's been on the market for about 4-5 years called Sonic Lens from UpState Audio. It has a DC coupled input design that can be used with phantom powered condenser mics. It uses a DC level shifting circuit with no capacitors or transformer to block the...