ZEN amp born on 4th of July - Page 2 - 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 7th July 2003, 06:24 PM   #11
MikeW is offline MikeW  United States
diyAudio Member
 
MikeW's Avatar
 
Join Date: Sep 2002
Location: North of Boston
Smile Nice work

It looks good. I like the boards and the silver caps. More pictures please.
__________________
MikeW
  Reply With Quote
Old 11th July 2003, 11:30 AM   #12
miguel2 is offline miguel2  Portugal
diyAudio Member
 
Join Date: Jun 2002
Location: Portugal
It surelly looks much better than my p2p ZenV4

If you have hum you can use the regulated PSU of the ZenV4 article (and I guess that you will end up with a full ZenV4...)

Miguel
  Reply With Quote
Old 11th July 2003, 12:56 PM   #13
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
Quote:
Originally posted by moe29

... have a bit of hum...

My Zen has no hum. For your info, my ground line arrangement (all built by p2p) is as follows:
Attached Images
File Type: jpg zen_psu.jpg (39.8 KB, 595 views)
  Reply With Quote
Old 11th July 2003, 11:07 PM   #14
moe29 is offline moe29  United States
diyAudio Member
 
moe29's Avatar
 
Join Date: Dec 2002
Location: Florida
Send a message via AIM to moe29 Send a message via Yahoo to moe29
Hi JH,

so you feel the hum is more of a grounding issue than a

power supply one? I was thinking i would add a capacitor and

inductor in front of the caps on the PCB to see what effect that

has. If the hum remains i could modify the PCB to your scheme

and see how that works. Thanks for the suggestion!



m.
  Reply With Quote
Old 12th July 2003, 04:37 AM   #15
Account Disabled
 
Join Date: Aug 2002
Location: Near to the Pacific Ocean
moe29

I was thinking to get one thing only--i.e. killing hum.
With the C-L-C, Nelson Pass is however considering to get two--i.e.
killing hum as well as a better sound.

This is a typical difference between me and a big man.

JH
  Reply With Quote
Old 5th October 2003, 09:20 PM   #16
moe29 is offline moe29  United States
diyAudio Member
 
moe29's Avatar
 
Join Date: Dec 2002
Location: Florida
Send a message via AIM to moe29 Send a message via Yahoo to moe29
just thought i'd update this project.

today i finally got around to modding the Zen's power supply a
little. I added two 10,000uf caps and a 2mH inductor, for a
C - L - C arrangement. The amp is dead quiet now!

i've been using the 2mH inductors that you can get from MCM...
i've read where people have slagged them for being cheap, but
they seem to do the job in the power supplies i've made so far...
they get barely warm in this application.

i'm not sure why this arrangement get's rid of the hum in the
unmodified Zen version. I guess the extra capacitence and the
inductor smooth things out...

(i think someone needs to read more about PSU's !)


now to put this baby in a nice chasis (the hardest part)


m.
  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
Happy 4th of July Dennis Hui The Lounge 5 5th July 2008 08:48 PM
Happy 4th of July BWRX The Lounge 0 1st July 2007 10:29 PM
So Much To Celebrate In July!! kelticwizard The Lounge 4 14th July 2004 04:30 PM
4th of July PedroPO Introductions 5 4th July 2002 04:37 AM


New To Site? Need Help?

All times are GMT. The time now is 11:48 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