Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › My DIY electrostatic headphones
New Posts  All Forums:Forum Nav:

My DIY electrostatic headphones - Page 9

post #121 of 1678
Thread Starter 

I've cut all the necessary parts and etched the unneeded copper on the PCB. If time permitted, I should be able to test them within 2 days.  :)

 

DSC_0883.jpg

 

DSC_0882.jpg

 

DSC_0884.jpg

 

Chemically etching a PCB to me is very difficult.  The result isn't pretty, but for an experiment, I think it will do just fine.  :)

 

Wachara C.

 

 

post #122 of 1678

Wachara, just inspirational. Watching with the keenest interest.

post #123 of 1678
Wachara, that's some fine work there. Please keep us updated!
post #124 of 1678

Nice work Wachara! smily_headphones1.gif

 

Why dont you route the PCBs instead?

 

Are you using FeCl or HCl when you etch the boards?

 

I use HCl - you have to be careful and do it outside, but I find it faster and easier to get good results!

 

/Roger

 

 

 

 

post #125 of 1678
Thread Starter 

Hi Roger,

 

I'm not sure what chemical I used, but it etched out the copper pretty quickly.  The reason why I didn't route the PCB is because I have some problems of unevenness of the machine surface.  The tolerance of PCB is very small and therefore I decide to use chemical etching.

 

Wachara C.

post #126 of 1678
Thread Starter 

I've just finished putting everything together.  Here are some pictures.

 

DSC_0887.jpg

 

DSC_0889.jpg

 

DSC_0891.jpg

 

DSC_0893.jpg

 

DSC_0895.jpg

 

DSC_0897.jpg

 

Wachara C.

post #127 of 1678
Thread Starter 

The first listening impression is that these headphones are a lot more efficient than my previous version.  The main reasons should be the thinner spacers in them and having 2 diaphragms on each side.  However, I feel rather uncomfortable listening to them.  My ears feel rather uneasy.  I'm not sure if it's because of the greater force pushing and pulling the air inside my ears or I'm just too tired.

 

Let me give them a few days to play lots of songs and I'll report back.

 

Now I'll need to look for a proper headband for them.  :(

 

Wachara C.

post #128 of 1678

This is, without a doubt, the thread that amazes most on the whole forum. Outstanding work.

 

 

post #129 of 1678

Even the huge SR-Omega drivers don't push and pull the air, they excite it via vibration so I doubt that is the issue here.  What bias and diaphragm/stator spacing are you using?

post #130 of 1678
basshead.gif Amazing.
post #131 of 1678

popcorn.gif

 

Great work!

 

 

I wish you had access to a distortion analyzer, like the one in this system: http://www.klippel.de/our-products/rd-system.html

 

I suspect what spritzer have in mind. Could the diaphrams be touching the stators? That could increase distortion and thus the fatigue.

 

We are looking forward to hearing your next report.

 

 


Edited by jgazal - 3/10/11 at 4:50pm
post #132 of 1678

subscribed

 

post #133 of 1678
Thread Starter 
Quote:
Originally Posted by spritzer View Post

Even the huge SR-Omega drivers don't push and pull the air, they excite it via vibration so I doubt that is the issue here.  What bias and diaphragm/stator spacing are you using?



Hi Spritzer,

 

I'm using 0.5 mm plastic as spacers and the bias voltage is 600V.  The diaphragm is 1 micron Mylar.

 

Unfortunately I can't listen to them today as I'm away for a business trip.  I was really exhausted after I put everything together last night.  I'll try them again tomorrow night and see if I like them better.

 

Wachara C.

 

 

post #134 of 1678

0.5mm and 600V is bang on the money.  If the diaphragm were to touch the stators (or rather if it were loose enough to do so) then the distortion would be easy to hear.  Open any Stax driver and the diaphragm is tight as a drum for this very reason. 

post #135 of 1678
Thread Starter 
Quote:
Originally Posted by spritzer View Post

0.5mm and 600V is bang on the money.  If the diaphragm were to touch the stators (or rather if it were loose enough to do so) then the distortion would be easy to hear.  Open any Stax driver and the diaphragm is tight as a drum for this very reason.
 


Hi Spritzer,

 

I know what you mean.  I don't think I have a problem with diaphragms touching stators.  If that happens, it's very obvious.  I'll report back after I have a chance to listen to them again tomorrow.

 

Wachara C.

New Posts  All Forums:Forum Nav:
  Return Home
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › My DIY electrostatic headphones