It is running a little hot for my taste though, with a supply of +/- 31,5v from a simple prereg. Hope it will help to drop 2-3v in the final c-r-c setup.
Regarding to my ignorance,
ive ordered some slightly bigger coolingprofiles than mentioned in the BoM.
For those in doubt about the PSU,
here is the announcement for a PreReg designed by the one and only
http://www.diyaudio.com/forums/group-buys/222164-paradise-phono-preregulator.html
This GB is intended to deliver at last around christmas, so after the design is finished, it should happen very quick.
Stay tuned.
I have now connected the amp part of the boards, and both inputs are easily adjusted to 0v +/- 0,5mv with 10ko and absolute 0 with the 100ohm that is supposed to be there finally; but both outputs are running havoc, constantly shifting value with everything in between +/-50mv. Is this normal, or should something be done about it? And in that case what?
I had initially 40mV output offset. That stabilizes after some hours. I think it is the leakage of the electrolytics. They have to "form" and then the leakage goes away.
If there is still too much offset after some hours you can read in Heseners building guide how to give the servo more "authority". There is also a way to trim the initial offset of the buffer. Measure before and after the buffer if there is any big difference.
If there is still too much offset after some hours you can read in Heseners building guide how to give the servo more "authority". There is also a way to trim the initial offset of the buffer. Measure before and after the buffer if there is any big difference.
