Sjöström Audio DIY forum

Projects => Power supplies => Topic started by: Sjoerd Smits on January 21, 2013, 06:22:38 PM

Title: SPS01 connections
Post by: Sjoerd Smits on January 21, 2013, 06:22:38 PM
Hi PA,

We had a little conversation via mail. On your request I opened this topic.

The following is the case:

I have a 2 x 25V 500VA toroid transformer hooked up to the power supply.

Secondary 1 on AC 1 and secondary 2 on AC 2. The output between NEG and POS supply is now 68VDC.

I need to have half that voltage to run my Hiraga amp. So what do I do?

Do I need to put the toroid in parallel, so the current doubles? And how do I connect it? If I do that and feed AC1 and AC2, the fuse blows out of 8 amps.... Do I only feed AC1 or AC2?

Please let me know....

Kind regards,
Sjoerd Smits
Title: Re: SPS01 connections
Post by: peranders on January 21, 2013, 06:30:07 PM
You have in other words ± 34 Volts. How much do you require? You can't get lower voltage than this.
Title: Re: SPS01 connections
Post by: Sjoerd Smits on January 21, 2013, 06:32:13 PM
Hi PA,

I need +/- 35 VDC for the Hiraga amp.....

Title: Re: SPS01 connections
Post by: peranders on January 21, 2013, 06:42:50 PM
Then it's perfect!
Title: Re: SPS01 connections
Post by: Sjoerd Smits on January 21, 2013, 06:46:52 PM
Hi,

I think I need a crash course in elektronics....

How do I connect the amps????

Between POS and ground????? I thougt between NEG and POS?????

Regards,
Sjoerd Smits
Title: Re: SPS01 connections
Post by: peranders on January 21, 2013, 07:24:26 PM
You connect the amp between, NEG, GND and POS. Don't you have any documentation of the amp design?
Title: Re: SPS01 connections
Post by: Sjoerd Smits on January 21, 2013, 08:35:01 PM
Ow my god (Slamming with my head against the door) I get it..... Soory to take up your time..... I'm new at this so please forgive me :-)

+35 NEG -35

No problems!!!!

Thanks again!
Kind regards, Sjoerd Smits