enginefire
Well-known member
- Joined
- Oct 19, 2011
- Messages
- 72
I'd like to fix up this psu, but when I take a closer look at it, it gives me some doubts.
Its for a fostex 3070 compressor.
It uses 2 positive regulators (78m15), one with its v out and grounds reversed, to get +/-15. Id like to switch these for either 7815/7915 or better yet 337/317.
My goal is to get the power rails to be very symmetrical, in hopes that the dc offset on the op amps will settle down. Maybe this Is a fools errand and I should just leave well enough alone.
My questions are regarding the dual secondary windings on the transformer. There is no CT. Each rail has its own rectifier. Can I tie one end of the -v rectifier to ground with the +v rectifier? Then probably cut a trace and then re organize the pinout of the -v regulator (they are on leads and mounted to the chassis do it should be too hard) to sort out the ground and -v?
Its for a fostex 3070 compressor.
It uses 2 positive regulators (78m15), one with its v out and grounds reversed, to get +/-15. Id like to switch these for either 7815/7915 or better yet 337/317.
My goal is to get the power rails to be very symmetrical, in hopes that the dc offset on the op amps will settle down. Maybe this Is a fools errand and I should just leave well enough alone.
My questions are regarding the dual secondary windings on the transformer. There is no CT. Each rail has its own rectifier. Can I tie one end of the -v rectifier to ground with the +v rectifier? Then probably cut a trace and then re organize the pinout of the -v regulator (they are on leads and mounted to the chassis do it should be too hard) to sort out the ground and -v?
