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Old 21st December 2001, 07:31 PM   #1
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Join Date: Dec 2000
Location: Önnarp, Söderslätt
Default Just an interesting link

In my casual surfing, I tumbled over this:
http://meltingpot.fortunecity.com/br.../doc/aria.html

I'm not a tube-guy, but if I'm not mistaken, it's a 100W without an output transformer. To me, that alone makes it very interesting.
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Hoffmeyer ;0)
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Old 21st December 2001, 08:17 PM   #2
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Join Date: Feb 2001
Location: Columbia, SC
Yup, that's an OTL (Output TransformerLess amplifier). Yes, such a thing is possible, and yes, it completely removes the output transformer.
I've seen that design, and I like the looks of it, but the 6C33 tube costs more than I can afford at the moment.
It's not difficult to simplify it even further; you really only need one tube up front connected as a differential.
Another good tube for OTL designs is the 6AS7--another power triode. It's not as high-powered as the 6C33, but it's also cheaper.
I've got an OTL design I've been working on for a while (in between other projects). When (yeah, yeah, Grey, we've heard this before) I get the silly thing going properly, I'll start a thread.

Grey
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