Hi All,
I'm building a pair of SSL 9k, using Keith's boards for this project.
I've built two PSU to feed the 9k with ±18v and ±15v, but on this two boards, I have a "problem" on the negative voltage which is about -20v.
The positive voltages are pretty good (+15 and +18, so).
I've try to change the L7815, but the voltage is still -20 on the board, which seems really high for a ±15v PSU ...
Is it really to high ?
Is it really a problem, or the voltage gonna drop when I will plug the SSL boards ?
If it's a problem, how can I solve it ? There is not so much components on this PSU, I don't really understand where can be the issue...
A friend of me is building the PSU too, and have the same problem (same components).
I hope this subject hasn't already be answered on the lab, I've try a search, with no success.
Thanks all.
Yoann
I'm building a pair of SSL 9k, using Keith's boards for this project.
I've built two PSU to feed the 9k with ±18v and ±15v, but on this two boards, I have a "problem" on the negative voltage which is about -20v.
The positive voltages are pretty good (+15 and +18, so).
I've try to change the L7815, but the voltage is still -20 on the board, which seems really high for a ±15v PSU ...
Is it really to high ?
Is it really a problem, or the voltage gonna drop when I will plug the SSL boards ?
If it's a problem, how can I solve it ? There is not so much components on this PSU, I don't really understand where can be the issue...
A friend of me is building the PSU too, and have the same problem (same components).
I hope this subject hasn't already be answered on the lab, I've try a search, with no success.
Thanks all.
Yoann