[Torac]

Hi Guys,
I attached (uploaded) my schematic design.
It uses the 272BX transformer.
It works pretty well.. I have the Stax SMR1/MK2 amp and strangely it seems quite similar.
The STAX amp also uses high power 25k resistors as the load, but they use transistors and I use FETs.
My design is much more simple.

https://imgur.com/a/kEamkLj

Edit: When I try and edit this post it shows that there is an attached file.. but once posted, I don't see a file where I can click and open... Any help is appreciated.

I would love to build my own energiser, I currently have just a srm-252s for testing my stats. Would it be possible to get a PCB like you mentioned before and a BOM? I would greatly appreciate it.

 

[qu1en]

I would love to build my own energiser, I currently have just a srm-252s for testing my stats. Would it be possible to get a PCB like you mentioned before and a BOM? I would greatly appreciate it.

Sure man, just PM me your email and I can send you all the info.

 

[afgmjkl]

Hello,
I have 007 which have tiny holes in the membrane, so am planning to renew it.
But I don't know how to separate rings that sandwich the diaphragm.
Any ideas?

 

[chinsettawong]

If it’s only a tiny hole, don’t worry about it. Renewing a new membrane isn’t that easy.

 

[afgmjkl]

If it’s only a tiny hole, don’t worry about it. Renewing a new membrane isn’t that easy.

Thanks for the advice.
If I remove the dusts and left channel keeps making buzzing noise, I am going to renew a membrane.

 

[chinsettawong]

The noise can only come from something like dust inside the driver. Even if you change the diaphragm, you might still have the problem. You need to patiently check the stators and diaphragm and clean everything extremely thoroughly. It’s not easy, but it’s achievable.

 

[legopart]

@wrinex do you reccomend the method of using speaker under the membrane to set the right tension?
if I can scale the tension
what the tension (in Grams) that I have to use on headphone diaphragm?

* I carved dipper hole inside Stax lambda normal so it have now 0.5mm depth.
* I accidently destroyed my sr-202 try to recoat them with antystatic spray and its melt the black color that coated on the stators

Can I acchive the same quality as branded original headphones from streching a diaphragm by myself?

 

[legopart]

Thanks for the advice.
If I remove the dusts and left channel keeps making buzzing noise, I am going to renew a membrane.

possible that the air conditioner or some humidity pass between the stators, you have to keep the headphones on dry place.

I have this issue on some old headphones too and I plan:
- add some mineral wool on the back of them
- add some resistor on the bias connector to protect it from too high charging, read that resistor can keep the driver from distortions (I think 10Mohm or even more)
*protecting from overcharching spead
*the last one is if the membrane over charged becoase the coating

 

[wrinex]

@wrinex do you reccomend the method of using speaker under the membrane to set the right tension?
if I can scale the tension
what the tension (in Grams) that I have to use on headphone diaphragm?

* I carved dipper hole inside Stax lambda normal so it have now 0.5mm depth.
* I accidently destroyed my sr-202 try to recoat them with antystatic spray and its melt the black color that coated on the stators

Can I acchive the same quality as branded original headphones from streching a diaphragm by myself?

hmm well i am no expert at all with ESL headphones, or even esl's i used the speaker method on bigger panels. i think it might be hard to pull off on headphones. maybe the weight thing might be the easiest method for a headphone.

not sure what anitstatic you sued and what material is on the stators...


may

 

[chinsettawong]

Yesterday was a very special day for me. I got to meet a young entrepreneur from India, Aumkar of Kaldas Research. He came to Thailand to meet me and to give me a pair of his electrostatic headphones. Using this opportunity, I set up a mini meeting with my local head-fi friends. We had a lot of fun listening to his headphones and many other.

By the way, his headphones sounded absolutely fantastic. Congratulations, Aumkar!

 

[Tachikoma]

Thanks for the advice.
If I remove the dusts and left channel keeps making buzzing noise, I am going to renew a membrane.

Try this: play a series of ultrasonic tones using Foobar2000's tone generator (25 khz, 30 khz, 40 khz) for 10 seconds each. You'll need to set the tone/sweep sample rate to 96khz in Advanced settings.

This won't help with major dust issues (you'll need to wet clean the stators with alcohol, at least), but it might get a pesky dust particle off without resorting to driver surgery. Seemed to work for me at least.

 

[afgmjkl]

Thank you everyone.
I removed dusts and renew dust cover with 2 micron mylar, and the problem seems to be solved.
I tried 1.5um Toray PET film as dust cover but that doesn't work. (can't insulate from humidity and causes noise)

 

[wrinex]

i still wonder why dustr is such a problem.. it never is with tweeters with 1mm spacings and far higher biases in the regions of 3Kv........ headphones..... few hundred


adding dustcovers just like quad did moves the upper ferquencies exactly the same way it does as using thicker foil . i once made tweeters with multiple membranes and doubling them, perfectly folows the use of 2 as thick foil

 

[chinsettawong]

i still wonder why dustr is such a problem.. it never is with tweeters with 1mm spacings and far higher biases in the regions of 3Kv........ headphones..... few hundred


adding dustcovers just like quad did moves the upper ferquencies exactly the same way it does as using thicker foil . i once made tweeters with multiple membranes and doubling them, perfectly folows the use of 2 as thick foil

Do you know that some headphones’ stators aren’t insulated. Any dust goes in between the stators and diaphragm can actually cause noise.

I don’t really notice the degradation of sound with the dust cover on though.

 

[legopart]

maybe the plates isolated.
quad 57 treble (squacker + tweeter) using 0.5mm and 1.5kV

the must DIY makers proffer to put the dust filter on headphones
after squashing it like this,
claimed that else it will damage some frequencies

on quad 57 guide it says to put it normally without stretching and some suggest to use some heat-shrink membrane and heat it.


squash like this

I think that humidity makes more sound distortion then dust, you will hear it without any sound from the headphone, the dust cover or some felt layers the only that can protect from it.


if it shorted (on headphones) you will hear really distorted low sound, on speakers I read that if you forget to put the resistor, all the diodes will blow (so DIY headphones to).