Which PS for my zen - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 13th December 2012, 08:08 PM   #1
JZatopa is offline JZatopa  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
Default Which PS for my zen

I recently picked up a diy zen amplifier that is missing it's power transformer. I have an amp with a EI transformer I hooked up to test the amp but I don't feel like cannibalizing one amp to make this one complete. Now I am a crossroads. Do I buy a transformer and just complete the amp or for about the same money do I try a resonant SMPS like the one here or reviewed here. Has anyone done a good write up comparing the same amp circuit on a linear and SMPS PS? Considering that a later modification to the zen amplifier series is a regulated PS, I would think the SMPS would be a great way to go. Does anyone else have an opinion on this?
  Reply With Quote
Old 16th December 2012, 07:14 PM   #2
JZatopa is offline JZatopa  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
Wow, 100 views and no reply?
  Reply With Quote
Old 16th December 2012, 07:43 PM   #3
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
Get a 25v 300-400va Antek with shield. You cant go wrong.

Antek - AS-3225

Antek - AS-4225
__________________
I build, therefore I am.
  Reply With Quote
Old 17th December 2012, 02:54 AM   #4
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
I agree wholeheartedly with the suggestion of a shielded Antek. They are fantastic.

However, the SMPS is awfully interesting...

I don't think you can make a bad choice.
  Reply With Quote
Old 17th December 2012, 04:48 AM   #5
JZatopa is offline JZatopa  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
Quote:
Originally Posted by 6L6 View Post
I agree wholeheartedly with the suggestion of a shielded Antek. They are fantastic.

However, the SMPS is awfully interesting...

I don't think you can make a bad choice.
Lol my problem restated perfectly.
  Reply With Quote
Old 17th December 2012, 11:49 AM   #6
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
The SMPS might be overkill, and will have to be perfectly quiet. The Zen circuit is sensitive to PS noise, that's why the coils were added in version II.
__________________
I build, therefore I am.
  Reply With Quote
Old 17th December 2012, 07:27 PM   #7
JZatopa is offline JZatopa  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
output ripple is also below 200mV for >35V - is this low enough? I don't know how to figure out the circuits psrr and correlate that with a power supply's noise/ripple.
  Reply With Quote
Old 17th December 2012, 09:42 PM   #8
diyAudio Member
 
vdi_nenna's Avatar
 
Join Date: Oct 2000
Location: PA, USA
Blog Entries: 1
Send a message via Yahoo to vdi_nenna
DJNUBZ, I"m not trying to convince you, but you have to consider that one might sound better or different than the other type of PSU, regardless of the ripple.
It's like comparing CCS to resistor to choke loading. In a simple circuit like the the Zen, they will all sound different.
__________________
I build, therefore I am.
  Reply With Quote
Old 17th December 2012, 10:13 PM   #9
JZatopa is offline JZatopa  United States
diyAudio Member
 
Join Date: May 2003
Location: Chicago
I understand they will both sound different. If I expected them to sound the same, I would just buy the cheapest. I was hoping that I wouldn't be the first one going down this path and that someone could give me some anecdotal information. My hunch is that SMPSs have reached the point of outperforming linear PSs when properly built. They generally have low output impedance and can source current very fast. I am still very much an amateur though so I don't want to end up spending money on the SMPS to find out that it is to noisy to use or has some other issues I am not able to overcome.

If I had the money to spend I would buy an smps and build a linear one to a/b. I still could do that using the transformer from my other amp I guess. I am leaning towards the smps but want to be 100% sure I am not tossing the money out the window as I would have no other use for it currently.
  Reply With Quote
Old 17th December 2012, 10:44 PM   #10
6L6 is offline 6L6  United States
diyAudio Member
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Reading your original post again make me as a question - Because you have cannibalized a different amp to get the Zen working, why don't you get the SPMS and determine in which of the 2 amps the linear sounds better and then where the SMPS is better.

This way you get to mess with 2 amps and get twice the experience with the SMPS.
  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
PS AUdio 5.0 preamp No PS 60 bux kolledog Swap Meet 3 3rd December 2012 10:02 AM
PS Audio PS Elite Integrate Amp jimmy50 Solid State 14 5th May 2012 06:07 PM
FREE: Pass Zen & Bride of Zen Kits. axissilverhand Swap Meet 10 2nd December 2010 06:01 PM
Zen PS Capacitor DerDuke Pass Labs 1 6th July 2005 06:57 PM
unregulated ps for zen v4 boris b Pass Labs 2 17th September 2002 06:34 AM


New To Site? Need Help?

All times are GMT. The time now is 09:39 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2