Need PSU for an 12ax7 tube mic pre
« on: September 06, 2014, 01:45:39 PM »
Hi guys, I've this PCB for 12ax7 tuve mic pre and I need a PSU for work it.
The PCB http://i.ebayimg.com/00/s/MTAzNFgxNTAw/z/dZMAAOxyaTxTVq57/$_3.JPG
I looked this trafo for the power supply http://www.musikding.de/Power-transformer-230V-230V-20V-63V
Bit, how can I rectify AC voltages un DC voltages and get The phantom rail?
PCB link:
http://m.ebay.es/itm?itemId=351054923536

Thanks
« Last Edit: September 06, 2014, 01:59:20 PM by Jitter »


Re: Need PSU for an 12ax7 tube mic pre New
« Reply #1 on: September 07, 2014, 05:29:25 AM »
I think use the first card of this site http://195.84.101.101/~goranl/projects/nad_stereo/tubeamp2/ for rectify the outs voltages of transformers in dc. One PCB for The 230v, one for 6'3v and one for the 20v.
What would be The values for elevate 230v to +260v, rectify 6'3v in dc and elevate 20v todo +48v?
« Last Edit: September 07, 2014, 05:38:09 AM by Jitter »