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In Reply to: RE: Your model 3s posted by Lew on March 03, 2014 at 16:45:40
While there is no dc bias voltage on the metallized diaphragm the stators do have a dc bias voltage applied. We need a dc bias voltage somewhere to make the speakers work. The Beveridge uses a high resistance stator plate with dc bias voltage applied. AC signal as well on the stator plates.Arcing is always a possibility with any stat. Some designs are less prone to this problem than others.
Edits: 03/04/14Follow Ups:
I know how they work. Perhaps I used the wrong term when I said no "bias voltage". What I meant was to refer to the unique way in which the Bev panels do work, where the diaphragm is conductive and there is no static charge on it. Thanks for correcting my semantics.
I thought it would nice for others that may not have as complete an understanding of the Beveridge. It is unique amongst stats.
In that connection, I have wondered how the Model 3s work off of a conventional amplifier but using the unconventional Bev ESL panels. Do they have a power supply built in, to bias the stators, or some equivalent?
Good question. While I have seen and heard the Model 3 I have never taken apart the Model 3 just the Model 2. The patent, etc., discuss the Model 2.
There must be some sort of bias power supply to energize the plates. Since both the plates and diaphragm are driven actively I am assuming two separate step-up transformers.
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