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voltage regulated modular psu

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Posted on February 27, 2015 at 12:17:07
vinnie2
Audiophile

Posts: 4481
Location: North Carolina
Joined: September 28, 2013
 Bouncy ball got me thinking about the modular psu I was going to build several years back but didn't. I think I want to try again. I would also make a modular driver unit and a modular opts unit. They would be set up for either SE or PP amps.
From Bounce's post (in power supply vs sound thread) I get the idea that a regulated voltage supply is needed so the B+ can be adjustable, but I have never worked with regulated supplies before. Going to start researching them, but if anyone has any schems for a good one (max B+ about 450 to 500 vdc) they are willing to share that would be great.

 

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RE: voltage regulated modular psu, posted on February 27, 2015 at 12:37:32
Triode_Kingdom
Audiophile

Posts: 10042
Location: Central Texas
Joined: September 24, 2006
 Just an option, you could build an unregulated supply and use a variac ahead of it. If you build the variac into the PS case, you could also bring the AC output to a socket on the front panel as a source of variable AC. A switch could be installed on the panel for AC to the PS. Just something to think about, might be easier than building a regulated supply from scratch, especially if you want high current/voltage capability for testing large amps.

 

RE: voltage regulated modular psu, posted on February 27, 2015 at 13:20:06
Caucasian Blackplate
Industry Professional

Posts: 8313
Location: Seattle
Joined: June 18, 2004
 I'd look at going out and buying an old stock one. I have one sitting in my lab that will do up to 600V at a couple hundred ma, and it even has an adjustable bias supply as well.

Sometimes the better sounding regulated supplies will really need to be designed around the amplifier circuit you plan to use.

 

+1, posted on February 27, 2015 at 13:46:31
Chip647
Audiophile

Posts: 2647
Location: The South
Joined: December 24, 2012
 Just build a conventional choke loaded supply and run it from a VARIAC

 

RE: voltage regulated modular psu, posted on February 27, 2015 at 18:20:57
vinnie2
Audiophile

Posts: 4481
Location: North Carolina
Joined: September 28, 2013
 Sounds like a good idea, and a lot easier too. Thanks.

 

RE: +1, posted on February 27, 2015 at 18:23:03
vinnie2
Audiophile

Posts: 4481
Location: North Carolina
Joined: September 28, 2013
 I think you guys have talked me into it.

 

please check your mail (nt), posted on February 27, 2015 at 20:12:52
bouncy ball
Audiophile

Posts: 1221
Location: British Columbia
Joined: July 26, 2003
 .

 

RE: please check your mail (nt), posted on February 28, 2015 at 05:30:09
vinnie2
Audiophile

Posts: 4481
Location: North Carolina
Joined: September 28, 2013
 Nothing in my mailbox or spam folder. Could you try again please.
Thanks

 

done (nt), posted on February 28, 2015 at 07:57:58
bouncy ball
Audiophile

Posts: 1221
Location: British Columbia
Joined: July 26, 2003
 .

 

RE: done (nt), posted on February 28, 2015 at 09:12:28
vinnie2
Audiophile

Posts: 4481
Location: North Carolina
Joined: September 28, 2013
 You have mail.
Thanks

 

RE: done (nt), posted on March 1, 2015 at 05:36:48
vinnie2
Audiophile

Posts: 4481
Location: North Carolina
Joined: September 28, 2013
 Bouncy
Your last two emails have come through ok, so please try sending me the item we discussed.
Thanks
Vince

 

still trouble connecting, any suggestion?, posted on March 2, 2015 at 09:13:20
bouncy ball
Audiophile

Posts: 1221
Location: British Columbia
Joined: July 26, 2003
 As I said, message box will not accept any file attachment.
regards
Wal

 

RE: still trouble connecting, any suggestion?, posted on March 2, 2015 at 12:05:12
vinnie2
Audiophile

Posts: 4481
Location: North Carolina
Joined: September 28, 2013
 I am not sure what is going on as I am able to receive attachments from others. I have another plan now, so lets just let it go for the time being. Thanks for trying!

 

RE: voltage regulated modular psu, posted on March 5, 2015 at 11:50:56
drlowmu
Manufacturer

Posts: 9730
Location: East of Kansas City
Joined: January 10, 2005
 Listening to an amplifier though a variac, on a well-thought-out high quality hi fi system, will be an added sonic compromise.

No free lunch, sorry but 'tis true !!

Jeff Medwin

 

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