On Sep 1, 2004, at 1:59 PM, Rob Atkinson, K5UJ wrote:
Hi Will,
thanks very much for these observations. I apologize for not giving
more information. I naively thought the photos would be enough.
interesting what you said about the low frequency coil, as I have
heard that having it wound on a solid cylinder form may be a problem
(heat buildup?).
I wish I had one of the original h.v. transformers. I would be glad
to send it to you but I guess the shop kept it. your comments about
coil tube thickness and plating very interesting also.
Why don't these amp manufacturers just bite the bullet and make us an
amp with the needed monster coils?
Rob -- The TL-922 is such an amplifier. Larger diameter conductors are
progressively used as freq increases. It is my opinion that whoever
designed the 922's tank had a good working knowledge of skin effect,
and that whoever designed the AL-1500's did not. . Not only are the
922's conductors sized to compensate for skin effect, cooling air is
sucked through the tank in order to keep the inductances cool.
- cheerz
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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