|6th March 2002, 10:07 PM||#11|
Join Date: Oct 2001
Location: Melbourne, Australia
Paul, thanks for the links.
There are three basic OTL topologies that I am aware of:
Single Ended OTL: Good old days when high impedance speaker loads were common. This is my preferred option. However this is not practical with the majority of speakers available today.
Futterman: Where the cathode of the driver tube is connected to the output. Simple and very effective concept.
Circlotron: Two current paths.
Modern topologies are all variations of the two latter types where feedback is a necessity. Hence my reservations. The only exception is Steve Bench’s Inverted Tube Amp that requires a large number of tubes.
Returning to the main discussion topic, perhaps Dave could enlighten us a bit more on his concepts of an input transformer for ESLs. What should the secondary current be at peak output?
Dave, are you planning to construct a single panel OTL or multiple full range panels? Just curious!
|7th March 2002, 09:20 AM||#12|
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
The panels will be mostly full-range (150 Hz & up) of easily manufactured size and stacked to produce a large line array (20-30 ft tall). As frequency goes up the driven panel will get narrower.
There are many things that need to fall into place before we can start prototyping.
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