TSSA V1.6 docs and buyers list - Page 9 - diyAudio
Go Back   Home > Forums > Commercial Sector > Manufacturers > SITO Audio

SITO Audio Dedicated to high Q Current and Voltage FeedBack amps kits

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 24th September 2012, 07:27 AM   #81
mikelm is offline mikelm  England
diyAudio Member
 
Join Date: May 2003
Location: England
Send a message via Yahoo to mikelm
Salas,

I occurs to me that we may be planning to build the same kind of regulator at the same time and wonder if you would like to work together on this.

Christophe has already shared a nice cap multiplier power regulator in the SSA thread:

http://www.esperado.fr/images/storie...ndo/supply.gif

and I have shown the choke supply that I am using now:

diyAudio

It is now my intention to to combine elements of both these schemes to create a very nice zero FB power amp regulator.

I feel I should say that I have no formal electronic training - my training only got to AC theory - but I do have the desire to build the very best audio that is possible.

If you and or others are interested perhaps we can begin a new thread.

cheers

mike

Last edited by mikelm; 24th September 2012 at 07:29 AM.
  Reply With Quote
Old 24th September 2012, 09:50 AM   #82
diyAudio Member
 
Join Date: Mar 2004
Location: Cologne
Send a message via MSN to planet IX
Mike,
what chokes are you using? I was also thinking about a choke-supply...

Regards, Boris
  Reply With Quote
Old 24th September 2012, 10:23 AM   #83
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Mike, Esperado's with TL431 and zeners you linked is just a series regulator not a multiplier or some combo. TL431 plays the role of the adjustable part of the voltage ref. The specified zeners give too high a voltage base for TSSA, they should be scaled down or made to a proper resistor. In any case the power dissipation on the chip should be taken into account. Its not that simple or zero Fb as thought just because there is no additional external loop in that schematic or bcs the TL just looks like some special zener. TL431 is a chip reg with enough inside and any reg with error correction feeds back. See it as an op amp. The capacitor multiplier like the example I had shown yesterday is just a filter, corrects for no voltage sag. Now there is a possibility that a small amp will sound bigger on some voltage give that works like a compressor and expander than with a stiff PSU. Think of tube amps with their small power and valve rectifiers but somehow psycho-acoustically bold. But to know what you prefer its easy to build those. So if you will take a crack at Esperado's proven reg first, remember its easy to convert it into a simple Cmultiplier and compare or vice versa.
*Make no mistake I am no engineer too so take everything I propose with a pinch of salt. There should be a builds thread for discussing the configs, I agree. Me I will start building somewhat late though since I have a few other things unfinished yet plus I need some delayed parts and sinks.
Attached Images
File Type: png TL.png (78.4 KB, 156 views)
  Reply With Quote
Old 24th September 2012, 10:30 AM   #84
mikelm is offline mikelm  England
diyAudio Member
 
Join Date: May 2003
Location: England
Send a message via Yahoo to mikelm
In my simple choke supply I am using the secondaries of 200VA EI tranformers 12V + 12V but I think 150VA 9V+9V would also be ok

I would suggest powering this with a torroidal 160VA or similar.

All this adds up to a VERY heavy PSU and I have separate supplies for each channel so the combined weight of my supplies is about 17kg !

I am very happy to have tried such a simple old fashioned supply. The results are great and I plan to keep this supply as a reference.

However, I worked out yesterday how much weight & money I can save on a supply if I use a combination of chokes & cap multiplier and it's substantial for both ! Also the cheaper lighter supply might give slightly better subjective results so that's why I'm going to try it.

If you decide to go for the purist simple approach I'm sure you will enjoy the results also but I would recommend you simulate your supply in spice before you make it or follow my design exactly otherwise there could be some problems with ringing.

Let me know if you need any other input from me

mike

Last edited by mikelm; 24th September 2012 at 10:52 AM.
  Reply With Quote
Old 24th September 2012, 04:48 PM   #85
mikelm is offline mikelm  England
diyAudio Member
 
Join Date: May 2003
Location: England
Send a message via Yahoo to mikelm
Sonny, Salas & All,

I would appreciate comments on this as a regulator section for TSSA.

This will follow some choke regulation so VHF and some audio noise will be filtered already.

My objective is simply to make the supply a little firmer and reasonably constant.

mike
Attached Images
File Type: jpg regulator 1.jpg (75.1 KB, 148 views)
  Reply With Quote
Old 24th September 2012, 08:18 PM   #86
sonnya is offline sonnya  Denmark
diyAudio Member
 
sonnya's Avatar
 
Join Date: Oct 2001
Location: Denmark
Sorry for being absent.

I would suggest regulated with feedback. We already talks about multiple parts. And if the regulated powersupply is done right. It would be a good match.

It don't have to be expensive parts here.... Only the bypass caps.....

About layout and snubber network. This i will comment later this week.

But i must say, you do a good work.
  Reply With Quote
Old 25th September 2012, 04:31 AM   #87
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by mikelm View Post
Sonny, Salas & All,

I would appreciate comments on this as a regulator section for TSSA.

This will follow some choke regulation so VHF and some audio noise will be filtered already.

My objective is simply to make the supply a little firmer and reasonably constant.

mike
Mike, uninspiring prediction on that one unfortunately.
Attached Images
File Type: png MLM.png (15.2 KB, 136 views)
File Type: png ZoMLM.png (18.8 KB, 131 views)
  Reply With Quote
Old 25th September 2012, 11:00 AM   #88
mikelm is offline mikelm  England
diyAudio Member
 
Join Date: May 2003
Location: England
Send a message via Yahoo to mikelm
OK How about this one for a regulator with FB. I wonder if this will excite a bit more enthusiasm

perhaps a bit less current from the CCS. 8mA might be better.
Attached Images
File Type: jpg active regulator.jpg (76.4 KB, 121 views)

Last edited by mikelm; 25th September 2012 at 11:07 AM.
  Reply With Quote
Old 25th September 2012, 02:16 PM   #89
mikelm is offline mikelm  England
diyAudio Member
 
Join Date: May 2003
Location: England
Send a message via Yahoo to mikelm
mmm- perhaps not a good enough Vref
  Reply With Quote
Old 25th September 2012, 02:45 PM   #90
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Shows good output impedance curve in the pass band, don't have time to analyze its OLG and phase margin, quite an insertion drop that will bring some dissipation & sinking plus a recalculated trafo.
Attached Images
File Type: png 2MLM.png (17.1 KB, 42 views)
File Type: png 2MLMZ.png (14.9 KB, 37 views)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
TSSA - The Simplest Symmetrical Amplifier Lazy Cat Solid State 1476 9th August 2014 06:02 AM
TSSA V1.5 sonnya SITO Audio 8 18th June 2014 07:00 PM
All P-channel Regulator For TSSA Split Supply? Jay Solid State 21 14th June 2012 03:16 AM
Philips CDM4 service docs? Pars Digital Source 0 18th August 2007 04:19 PM
Any docs for CDM4/31? till Digital Source 52 10th August 2004 02:16 AM


New To Site? Need Help?

All times are GMT. The time now is 06:01 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright Đ1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2