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My DIY electrostatic headphones - Page 64

post #946 of 1299
Quote:
Originally Posted by dude_500 View Post

I've been having a dust squeal in my right channel for weeks. I've brushed off the diaphragm dozens of times, checked and cleaned the stators for surface dust, and just don't know what's up. Has anyone had any difficult-to-eliminate squeals and found any tricks? It's usually only present in high humidity (almost continuous squealing if I try to wear them after showering and having wet hair, otherwise the squeal is somewhat rare occurring only a few times a day)

 

There is a fair bit of dust on the diaphragm because I don't have a cleanroom so it's effectively impossible to get fully clean, but it's no different form the left channel which rarely if ever squeals.


 Get all the dust off the diaphragm with compressed air and a brush , that's the only way to do it. 

post #947 of 1299

Squealing seems to have been a little bit of mylar extending past the edge of the diaphragm holder. Ran a soldering iron around the perimeter and it seems to be silent now. 

 

I'll try compressed air if I have any more dust problems. I try to avoid brushing as it disrupts the coating surface. The coating still works fine, but it is visibly disturbed. It rarely matters, but I have had it affect balance slightly.

post #948 of 1299
Thread Starter 

A few friends here in Thailand have auditioned the JF and liked them.  I think it's interesting and will try to make a similar pair to see how mine can sound as compared to them.  I don't like the idea of using 1200V bias voltage as JF.  So, I change the width and height a little and will be using 0.5 mm spacer and 580V bias voltage as Stax.  Let's see how mine'll sound.

 

 

 

What I'm aiming at is the active diaphragm area of 78 mm x 120 mm.  They'll be BIG!  beyersmile.png

 

Wachara C.

post #949 of 1299

Those are truly earspeakers... redface.gif

post #950 of 1299

Can't wait to see the final prototype Wachara

post #951 of 1299
Thread Starter 
Quote:
Originally Posted by spritzer View Post

Those are truly earspeakers... redface.gif

 

If I stack a couple of them up and find a good subwoofer, I'm sure that they can make a pair of good desktop ESL.  biggrin.gif

post #952 of 1299

Can't wait to see and listen to them.

post #953 of 1299
Thread Starter 

I listened to the new JF at a friend's place yesterday.  The JF sounded really nice.  It's like listening to a pair of ESL and was very comfortable to wear since they're very light.

 

However, I don't really like it's built quality.  With such a high price tag, it deserves better quality.  The frame is actually made from some plywood.  confused_face.gif

 

Anyway, the listening session gives me the inspiration to move on ahead with my version of these ear speakers.  I'm sure I can make them as good if not better.  wink_face.gif

 

Wachara C.

post #954 of 1299

popcorn.gif

post #955 of 1299
Quote:
Originally Posted by jackcarver View Post

haha. this is inside of the rainbow kgsshv.
I don't think I recall ever seeing a transformer like -that- in a KGSSHV.
post #956 of 1299
Thread Starter 
Quote:
Originally Posted by AnakChan View Post


I don't think I recall ever seeing a transformer like -that- in a KGSSHV.

 

There is nothing wrong with an EI core transformer.  L3000.gif

 

Wachara C.

post #957 of 1299
Quote:
Originally Posted by chinsettawong View Post

 

There is nothing wrong with an EI core transformer.  L3000.gif

 

Wachara C.

 

Yup, better is some ways than the toroids. 

post #958 of 1299

But,   but,,, toroids are supposed to be "State-Of-The_Art"

post #959 of 1299
Thread Starter 
Quote:
Originally Posted by wink View Post

But,   but,,, toroids are supposed to be "State-Of-The_Art"

Why do you think so?
post #960 of 1299

I think he was joking.  If you want state of the art then there is C-core wound properly. 

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