Sjöström Audio DIY forum

Projects => Power supplies => Topic started by: Brambus on June 06, 2015, 10:08:19 AM

Title: SSR04 output voltage
Post by: Brambus on June 06, 2015, 10:08:19 AM
Hi P-A
i have just finished the first board you sold of this power supply.
I used 15V LM329 BOM; put 1K multiturn trim over the IC instead of the wire link.

All seem to work fine, but i can trim the voltage only from about 15.7 v minimum, up to 22-23 V
There is something that i should check/change to get a wider range of regulation ?
Thanks

Brambus
Title: Re: SSR04 output voltage
Post by: peranders on June 06, 2015, 11:38:31 AM
Please start to read the documentation. You have the formula there but if you have any problems with that I'll help you on Sunday.
Title: SSR04 output voltage solved
Post by: Brambus on June 06, 2015, 07:29:38 PM
Thank you P-A. Problem solved.
Vout 15.8 volt is perfectly inside the 5% range of tolerance of LM329

So...
taking away R18 and R19 from the board (4K7 ohm),  the trimmer start regulating at about  14,28 volt.
I'm now able to obtain 15V perfectly stable from both sides.

Really a beautiful kit (as always...)

Cheers
Paolo
Title: Re: SSR04 output voltage
Post by: peranders on June 07, 2015, 07:52:14 PM
Glad that everything worked out for you.  :-D