Geting better output of the ESL panel

[Calvin]

Hi,

I get the impression, that somehow in one of the setups had been a mistake. I don´t know of any other reasonable explanation that backs up Tyus claims.
There´s hardly anthing as undisputable as the need for bias in an ESL.
The only chance to omit with an dedicated Bias supply would be the use of an electret material. All other configurations need a bias supply, which of course has to be connected to the diaphragm and the stators via means of conducting elements.
Tyu why do You insist on using slang instead of plain understandable english? As a native speaker this could be regarded as unfriendly behaviour against those forum members who don´t talk english as native tongue. How´d You like If I´d talk german to You, or other guys talk dutch, chinese, french or whatever to You? It´s for good reason, that the forum rules ask for plain english, or an translation. Sorry for OT, but I´m out of this.

jauu
Calvin

[bolserst]

Originally Posted by tyu

(C) This is the configuration tyu posted at the beginning of this thread. The HV supply connected to nothing but the diaphragm. Theory and experiments agree that the HV supply will not charge the diaphragm unless it is connected to both the diaphragm and stators.

You say this...but it playing here now an has been for years just like you show in C...go figg...

Since (C) will not charge the diaphragm, the only logical conclusion is that you are using configuration (D). I know you said the circuit board just has a loop on it, but you might check more carefully, on both sides. Look for traces hidden under the terminal block. Or, forget about trying to trace the circuit and just measure with an ohm meter. I'm sure you will find conductivity between the terminal block where you connect the stator and the secondary of the HV transformer on the circuit board as shown in the schematic.

I do find it funny that any one would put the neg. input of a amp on the 0of a bias when if like most setup well work with just the 0of the bias on the windings to charg the panel...in your theory?...this can not sound good...an would not bias 0 have the ac v there the bias is floting....no earth....an no amp neg amp input..if you were going to put the bias 0 in...that would be a nef right

You are correct, there is no reason to need an earth reference on the secondary side of the step-up transformer for the ESL to work properly. I would bet that most DIY ESLs are constructed this way.

[bolserst]

Originally Posted by Calvin

There´s hardly anthing as undisputable as the need for bias in an ESL.
The only chance to omit with an dedicated Bias supply would be the use of an electret material. All other configurations need a bias supply, which of course has to be connected to the diaphragm and the stators via means of conducting elements.

Agreed. ESLs may sound magical, but the electrical principles by which they operate are not.

[tyu]

Thanks for all your time an under standing....

An i have had Soundlab A3...an a lot of Acoustats...an the logans....only the logan an this was in the 90 had the setup with no o in the mix...An i think it was a fluk...I think thay mint to put the 0 in the mix just like you guys have said...you are right.


I am the one who then set out to get my head around this...So i went to the other ESL that were at hand...an pulled the earth...an then get 0 off the bias out of the tranfourmer setup...I like the sound
So i just lived with it for 5-6 years with no down side.. i could see...i would take a pr of speakers an just do one speaker at a time...an get others to help me ..i did not trust myself...an evey time thay found the speaker with the bias out of the mix to sound better..So i move on to the newer ML an set them up this way an so far all are happy.
All the new logans have the 0 in...an the earth has been out of all the logans i have had
My hands on... Now were here..
Thanks