Sagged emginn expert horn fixed

[2Bdecided]

Thank you. Fascinating stuff. I would live to know the physics and math's behind all this.

[Orchorsol]

Thank you. Fascinating stuff. I would live to know the physics and math's behind all this.

Two good places to start are Wilson & Webb's book of the late 1920s and this excellent article http://kolbrek.hoyttalerdesign.no/image ... rticle.pdf

[emgcr]

The Wilson/Webb book entitled "Modern gramophones and electrical reproducers" has long been considered the original "Bible" on the subject since, as Orchorsol says, it was first published in 1929. It is currently available from ABE Books and, whilst somewhat expensive, is essential reading for serious students of the subject.

http://www.abebooks.com/servlet/SearchR ... eproducers

Percy Wilson went on to write a second volume, first published in 1957, called "The Gramophone Handbook" when technical editor of "The Gramophone". This publication is not so far reaching in the fundamental technical history of the subject but adds to the story of developments in the electrical age. It is less expensive and more readily available.

http://www.abebooks.com/servlet/SearchR ... e+handbook

Both books reward careful study.

[Steve]

I've been studying the theory of Wilson etc horns for a long time

Two good places to start are Wilson & Webb's book of the late 1920s

I wouldn't get too bogged down with this theory if I was you! It doesn't always translate into practice! Some much earlier horns amplify just as well as so-called "exponential" ones and sound just as good. Also, Wilson / Webb did not invent the theory or were not even the first people to try it in practice. I should Google "Western Electric" and "Bell & Tainter" instead if I was you.

The only reason most American collectors do not rampantly dispute the view that Wilson innovated the first exponential horns, is simply because they don't read all this stuff about EMG!

[emgcr]

I don't think anyone is suggesting that Wilson/Webb had either exclusive or first and last words on the subject---such considerations seem to be of little import so long after the event. What does seem relevant is the basic knowledge and actual experience of these great minds (and there were certainly many others of course) conveniently embodied in the publications from which we can benefit. Percy Wilson, in particular, had a facility for explaining a complicated subject in a manner which could be understood by most people with a will to learn. It seems to me that it is extremely helpful to be able to read well-expressed publications which embody "state of the art" knowledge on the subject at any one time giving an excellent grounding for further understanding from other sources, of which there are many. Studies on the subject continue to this day and promote endless fascination.