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In the Forum: Melquiades Amplifier
In the Thread: Ultimate HF output transformer?
Post Subject: Ultimate HF output transformer?Posted by Romy the Cat on: 7/14/2005
This thread is a derivation from the thread:
An ultimate transformer within a narrow bandwidth?
Since my Super Milquades is up and running I’m wondering what can I do with the output transformer at HF channel in order to push the envelop of “possible” in SET further then it has been already pushed in this amp.
The HF channel in Melquiades operates from 3.7hz and the output stage is sits being a coupling capacitor of 420pF. The output transformer is made for me by Lundahl, 10:1 Amorphous core, ~1H, 250mA. It does fine but the question is why at this frequency I would ever need a cored transformer and why an air core transformer might not be used?
CV made air core OPT in past and reported positive results. From a different prospective I have heard some comments in the past that my output stage (I use a half of 6C33C) with coreless transformer might experience some “issues”…
Anyhow, I see Bud is hanging around; he is a magnetician, “an applied magnetics designer”, which in the contemporary world makes his profession more like magician. Perhaps Bud, Chris, Thorsten, Joe, Dima and whoever else might my share their considerations of the subject of air core OPT for HF channel. Or perhaps someone could point out a place when I can get a pair, at least to try…
I wonder: if I have an amp that push the full SET power down to 7Hz then why should it have full power up to 150kHz? I have to note that what my current HF transformer does serves fine and do not bother me, BUT I would like to find out if conceptually air core (in this case) would be a fruitful direction to go. My extended experiments with the crossovers coils indicate that it should be but I do not know how about the output transformers…
Rgs,
Romy the Cat
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