Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Headphone Systems Everything to do with Headphones

AT-HA-5000 schematic
AT-HA-5000 schematic
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 3rd February 2018, 04:09 PM   #11
Ricotjuh is offline Ricotjuh
diyAudio Member
 
Join Date: Sep 2010
I bought the kit. When I received it, I will share my experience
Just found some extra information:
Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 19th February 2018, 02:59 AM   #12
chillysalsa is offline chillysalsa  Canada
diyAudio Member
 
Join Date: Jun 2004
Location: T.dot, Canada
Is the 1K trim pot in the middle to set the bias?

If so, how does one set that correctly?
  Reply With Quote
Old 26th February 2018, 01:28 PM   #13
Ricotjuh is offline Ricotjuh
diyAudio Member
 
Join Date: Sep 2010
I received 0.22 ohm / 5W emitter resistors instead of 0.1 ohm. Is this a problem? For the current through the FET?
  Reply With Quote
Old 6th March 2018, 04:44 PM   #14
Ricotjuh is offline Ricotjuh
diyAudio Member
 
Join Date: Sep 2010
I have also another question, there are 3 different Silver Mica capacitors in the diagram. Namely 15pF, 27pF and 6pF. But I have received 16pF, 30pF and 5pF. Are these differences noticeable / audible? This also applies to some resistances. As an example I should have 24ohm but have received 22ohm. This also applies to some other values. Is it worthwhile to still order the right values or are these differences too negligible?
Click the image to open in full size.
  Reply With Quote
Old 6th March 2018, 10:35 PM   #15
keilau is offline keilau  United States
diyAudio Member
 
Join Date: Mar 2013
Location: Windy City, US
Quote:
Originally Posted by Ricotjuh View Post
I have also another question, there are 3 different Silver Mica capacitors in the diagram. Namely 15pF, 27pF and 6pF. But I have received 16pF, 30pF and 5pF. Are these differences noticeable / audible? This also applies to some resistances. As an example I should have 24ohm but have received 22ohm. This also applies to some other values. Is it worthwhile to still order the right values or are these differences too negligible?
Click the image to open in full size.
I am very eager to see your full evaluation of the kit and assessment of the finished headphone amplifier. Looking at the PCB and layout, it seems to me to be a clone of the Shanling PH100 which was a clone of the Technica HA5K. The PH100 has long been out of production. The seller also sells the complete package finished for $334.

Aliexpress.com : Buy GZLOZONE Finished Clone AT HA5000 Class A Headphone Amplifier from Reliable class a headphone amplifier suppliers on sep_store
  Reply With Quote
Old 7th March 2018, 01:27 AM   #16
chillysalsa is offline chillysalsa  Canada
diyAudio Member
 
Join Date: Jun 2004
Location: T.dot, Canada
This GZLOZONE looks more true to the schematic in the second post. From a quick glance they have 3 trim pots, while the Breeze Audio clone has only 2. Which I am still not sure how to optimize.
  Reply With Quote
Old 7th March 2018, 05:49 AM   #17
Ricotjuh is offline Ricotjuh
diyAudio Member
 
Join Date: Sep 2010
The 1K pot in the middle is to set the bias. Set it to the point so there is 200mA true the 0.1ohm resistor.
  Reply With Quote
Old 7th March 2018, 02:24 PM   #18
chillysalsa is offline chillysalsa  Canada
diyAudio Member
 
Join Date: Jun 2004
Location: T.dot, Canada
Quote:
Originally Posted by Ricotjuh View Post
The 1K pot in the middle is to set the bias. Set it to the point so there is 200mA true the 0.1ohm resistor.
Thanks very much!
  Reply With Quote
Old 7th March 2018, 07:02 PM   #19
Ricotjuh is offline Ricotjuh
diyAudio Member
 
Join Date: Sep 2010
With the other potentiometer the balance; minimum DC on the output in idle state.
  Reply With Quote
Old 7th March 2018, 11:58 PM   #20
chillysalsa is offline chillysalsa  Canada
diyAudio Member
 
Join Date: Jun 2004
Location: T.dot, Canada
You mean the other 1k trim by the input? Or the other 100 ohm trimmer near the input?
  Reply With Quote

Reply


AT-HA-5000 schematicHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
MC PRE-AMP ETI 5000 SuperTuck Analogue Source 15 10th March 2014 06:35 PM
phonic xp 5000 schematic C3PO Solid State 17 8th June 2012 12:09 PM
Powersoft Digam 5000 and Q4002 Schematic b15075 Class D 0 8th December 2010 02:56 AM
APC SmartUPS 5000 schematic Johan_Ch Everything Else 3 21st January 2008 12:04 AM
Aurex (Toshiba) SA-5000 Schematic? manxam Solid State 0 30th December 2003 03:21 AM


New To Site? Need Help?

All times are GMT. The time now is 03:28 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki