New MINI ZEN Headphone Amp PCB group order... - Page 7 - diyAudio
Go Back   Home > Forums > Commercial Sector > Group Buys

Group Buys Members group buys

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 30th June 2005, 03:14 PM   #61
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Quote:
1. Where did you get the chassis?
I bought it from Elfa.se, the manufactorer is Teko in Italy:
http://www.teko.it/Eng/ENCLOSURES/frame.htm
The page works in frames so I couldnt link you directly:-( Its in the RF series, and called Dissipator. Check out the homepage for a local dealer.
Quote:
2. Why the heatsinks? Was the chassis it's self not enough to cool the amps?
Because it was easier to mount the hole thing on the bottom. I didnt try to use the amp, with only the chassis as a heatsink. I did use the sidepanels of the chassis as heatsink for the reg's though. Have a look.
Its running 290 mA. The regs are the 2 small perfboards at the rear.

Steen

BTW I dont think the chassis itself will do the heatsinking
It runs fairly warm.
Attached Images
File Type: jpg zen_headphone_amp_top.jpg (80.0 KB, 969 views)
  Reply With Quote
Old 30th June 2005, 03:21 PM   #62
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Quote:
I hope to finish mine soon, but I have been busy on my Krell Clone, Pass Mini-A, Hypex UcD-180's and the speakers all of them will be tried / used on...
That situation sounds quite familiar to me Just one more thing; The pinout of Q3 that digi01 uses, isnt the same as the ZTX450 and other normally used transistors! I used MPSA18 and had to twist the legs a bit
Check the designation on the board and compare it to whatever transistor you will be using

Steen
  Reply With Quote
Old 7th July 2005, 10:03 AM   #63
r_jik45 is offline r_jik45  Japan
diyAudio Member
 
Join Date: May 2005
Location: Jpn, Fr
Hi all,

digi01,
Is a single power supply fine for two amplifiers?
Because, as others, I planned to make one per channel
  Reply With Quote
Old 11th July 2005, 02:05 AM   #64
digi01 is offline digi01  China
diyAudio Member
 
digi01's Avatar
 
Join Date: Mar 2003
Location: BEIJING
Send a message via MSN to digi01
hi steenoe,
Really nice building!what headphone are you using now?have you compare the difference of regulator psu and unregulator psu?

For the heatsink,I agree with steenoe.mine is a 3mm thickness,A4 paper size aluminium board for the chassis&heatsink.


to r_jik45,
I have run the Zen headamp with a couple of 35V unregulate power supply for dual mono,and a single 22V regulate psu for 2channel.I think the regulate psu make a preferable bass.


Z.
  Reply With Quote
Old 12th July 2005, 01:58 PM   #65
r_jik45 is offline r_jik45  Japan
diyAudio Member
 
Join Date: May 2005
Location: Jpn, Fr
digi01,
Thanks for your reply.
  Reply With Quote
Old 12th July 2005, 09:10 PM   #66
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Quote:
what headphone are you using now?have you compare the difference of regulator psu and unregulator psu?
I have a pair of Beyerdynamics DT880. I didnt compare the reg psu to an unregulated, since I had this regulated supply made allready. Just had to remove one Zener each side to get 24V.
The amp sounds fantastic. I didnt do any mods to make it fit the Beyer's. They are higher impedance than Grados, but that doesnt seem to be a big concern.

Steen
  Reply With Quote
Old 13th July 2005, 05:35 AM   #67
diyAudio Member
 
tortello's Avatar
 
Join Date: Jul 2001
Location: Genoa (ITALY)
The amplifier is quite universal, even if some "faces" of its sounds were "cutted" to obtain an happy marriage with Grados.
Which are quite demanding towards electronics...

Marcello
  Reply With Quote
Old 13th July 2005, 04:43 PM   #68
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Hi Tortello
Thanks a lot for this fine piece of work It sounds just great.
Quote:
The amplifier is quite universal
Yep, I guess you are right about that The Beyer's never sounded better.

Steen
  Reply With Quote
Old 13th July 2005, 06:49 PM   #69
diyAudio Member
 
tortello's Avatar
 
Join Date: Jul 2001
Location: Genoa (ITALY)
Quote:
Yep, I guess you are right about that The Beyer's never sounded better
Hello Steenoe
thank you for your nice remarks.
Today about 200 amplifiers have been built, at least from the feedback I received straightly from the builders.
Sooner or later there will be an improved version of this amplifier, as soon as time will permit to develop some ideas.
Anyway... happy that you found it pleasant!
All the best from Italy

Marcello
  Reply With Quote
Old 13th July 2005, 08:12 PM   #70
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Quote:
Sooner or later there will be an improved version of this amplifier, as soon as time will permit to develop some ideas.
Tortello, I am amazed allready by this amp If you have some improvements, up your sleeve, that would be even greater Now that I started etching my own boards, I will jump right in, for sure If you post those nice pdf's again

Steen
  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
New Aleph-X PCB group order... hifiZen Pass Labs 334 19th November 2007 07:45 AM
IRFP044 Group Order PrimeCase Pass Labs 94 6th May 2004 06:34 PM
Aleph PCB group order Tieftoener Pass Labs 84 11th November 2003 06:31 PM


New To Site? Need Help?

All times are GMT. The time now is 09:05 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