tube phasing for more power?

[oshifis]

Having read the topic title, 3-phase electromotor jumped in my mind. There are 3-phase power distribution systems, too. The only difference is that we have music, not a single frequency that can be described by a single constant speed rotating vector...

[yourownfree]

whoa! that is a thought. I can see something happening here I never expected. Wheels are turning.

[jechentau]

multiphase switchmode in/converters are possible and extant, is that what you meant?

where multiple phase shifted bridges feed a common out, to roughly divide the output ripple for a given output capacitance of the filter, by the number of bridges afaik.
your very cpu power feed may have it ;p ridiculous currents btw, say 30 A :O

[Tom Bavis]

Here's an article from Radio Electronics (1956) that shows "extended class A" - parallel push-pull with class A and class C coming in on peaks.

http://www.audiophool.cjb.net/Misc/RE_5-56.pdf

[Wavebourn]

Originally Posted by Tom Bavis

Here's an article from Radio Electronics (1956) that shows "extended class A" - parallel push-pull with class A and class C coming in on peaks.

http://www.audiophool.cjb.net/Misc/RE_5-56.pdf

Heh... Walker patented Current Dumping 20 years after it was published by somebody else.
Approximately at the same time when he patented it I made my class A+C SS amp independently...

Thank you Tom! Unfortunately, I can't click "Thank you" button: they were expired.

[scooperman]

Originally Posted by smoking-amp

Well, one could just cheat:
Class Double A - diyAudio
A similar setup that has been used before has triodes for the 1st level and pentodes for the higher power level. Grid biasing determines when each tier parallels in.

For an example, if you can find a copy, this in Tremaine's "Audio Cyclopedia", the combination triode/pentode circuit is shown in Figure 12-130. It is described as "extended Class A". I was searching the forum for "extended Class A" because I am interested in building one of these, and the search led to this thread.

[Sch3mat1c]

They do that. It's called a distributed amplifier.

Amplifiers are arranged along a pair of transmission lines, so that the input is applied to each amplifier in turn, phase shifted as it goes. Because the capacitance and impedance of each amplifier acts on its own segment of the transmission line, they are able to operate sort of independently, so the output signal is built up as it travels down the line.

At low frequencies, the transmission line reduces to a simple wire, and you have a simple parallel output.

Tim