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In the Forum: Audio Discussions
In the Thread: How to get a LOT of SET power.

Post Subject: Yes, it is interesting to fantasizePosted by Romy the Cat on: 3/26/2011

A few days ago a friend of mine and I did spent over an hour to fantasize what might be done if the ULF tube SET is planned. It is not so simple as to drive the tube like 833/GU-48, you will not be able to do with Milq driver. But I also would like do not have 3 stage amplifier. It needs to be a powerful driver tube that itself will be able to work at high voltage. Ideally I would like it to be direct coupled, the same way how my MF amp is made with second PS float the driver tube. For sure it would be a complex amp but I would like to avoid any inner-stage transformers. I have a paranoia that in any devise shall be only ONE transformer in signal pass, do not ask me why but I would like do not search for one million henries line-stage transformer…. So, 500K-600K input impedance, 30dB gain. 150-200W in Class A, single ended, two stages, no SRPP in driver stage, no parallel drivers stage, ultra-low impedance of output stage PS, a lot of headroom for driver and output stage, a very large non-sectioned output transformer. I true like the idea of paralleling of output stages by 6C33C. If you drive it at 55-58W then it has Rp of near 100R. Connect 10 of them and you have 200W with combined Rp ultra low. You can use 1:1 transformer with primary impedance of a few Ohms. You can make very insulting amp this way. In fact I am not sure if it would not be possible to pass right and left channels across the same amp. It thinks it might be possible to sample it high rate and make non-auditable for LF.

Anyhow, I am for sure will not be doing it but indeed it is fun to have some fantasies about it.

The Cat

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