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Teardrop headphones amplifier
Teardrop headphones amplifier
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Old 7th December 2017, 04:02 PM   #1
dreamth is offline dreamth  Romania
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Join Date: Nov 2010
Default Teardrop headphones amplifier

This is my last headphones amplifier :

Click the image to open in full size.
http://i68.tinypic.com/ea39ly.jpg

Click the image to open in full size.
http://i68.tinypic.com/2i1iohu.jpg

begining of pcb population:
Click the image to open in full size.

It's based on the original idea of Ross Mc Donalds depicted in Fig 9 acf-3, the last image here:

http://jrossmacdonald.com/jrm/wp-con...deFollower.pdf

My first version using a depleted pcb from another headphones amplifier which had the output transformers i use now in this project.The output transformers were made by Lazaroiu.
Click the image to open in full size.
Click the image to open in full size.

The subject was discussed and simulated also for the first time by G Sabac who helped me with the spice models here and also showed me some flaws in my design allthough i made it public after two days of intense listenings and i was very pleased with the sound:

Teardrop headphones amplifier - Accesorii audio - Forumul Electronistilor
If you need to see those discussions you need to register and translate .

The inductances are some aproximate values of the real transformer.The real values are a bit higher , but not by much.
Capacitors on the schematics have different values on the schematic as i use real bipolar nichicon muse bs and nichicon muse kz in paralel for cathode coupling.
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