crap regulators?

[Stewart Pye]

Probably not the cause of your problem, but are the smaller caps after the
regs? You should always have a decent sized cap on the output of the regs.
I use a 47u in parallel with 100n. 


Regards,
Stewart Pye 

BTW: I've never had a 7815 that far out.




At 04:52 PM 13/06/2000 +0000, Carlos Vila Deutschbein wrote:
>Hi all!
>I just built a bog standart power supply which delivers +/- 15V
>It has a mains transformer, full wave rectifier, big filter caps, smaller
>caps and a 7815 and 7915 regulators at the output.
>The problem is that I don't get exactly +/-15 V but +14.5 and -15.2 V
>(measured with a DMM and O'Scope). I replaced the positive regulator with
>the same model (brand unknown to me), but the same happens. The input of
>the regulators is above +/- 22 V. The measures were taken with no load at
>all. I can't understand what happens...
>Are these crap regulators?
>
>
>==============================================================       
>    Carlos Vila Deutschbein
>    e-mail: si04697 at salleURL.edu
>    www: http://www.salleURL.edu/%7esi04697
>--------------------------------------------------------------
>
>
>