Hello Fellow amp builders, Hows that for ideas! Tap points along the CCS, Shade feedback & impedance reduction with an input tranny. Then a 50w single output device SE amp 🙂
you can build sort of Aleph with that
JFet LTP , emiter follower , said mu-follower OS
et voilà!
JFet LTP , emiter follower , said mu-follower OS
et voilà!
Thanks, ZM - I like the Austerlitz stuff but given the size it will be, it may cost as much as a mint Trabant!
I was hoping someone might already have ideas on specific makes and models that would work.
Heat
Heat is definately problem with 180W dissipation on one channel. That is the main reason I avoid building Class A amplifiers having more than 10W of output power. I think it would be good idea to use SMPS power supply for lighter, smaller and more efficient PSU.
Heat is definately problem with 180W dissipation on one channel. That is the main reason I avoid building Class A amplifiers having more than 10W of output power. I think it would be good idea to use SMPS power supply for lighter, smaller and more efficient PSU.
I enjoyed the coverage of this great event which relayed a broad range of interesting and inspiring information. I was also glad to actually see the participants in action instead of just their static photos; a definite treat. Many thanks and appreciation to Mr. Rothacher, the presenters, attendees, and all behind the scenes who made this event a reality.
Well, after seeing some of the coverage, my decision to skip BAF this year suddenly looks a lot less smart...
Ahh well, there's always going to be next year.
Jan
Ahh well, there's always going to be next year.
Jan
YAY!!!
That was FUN!!
The venue was fantastic, much better than I ever would have expected, the sound was pretty darn good in the small rooms, there was a bunch of stuff new to the show, and lunch was great!
But best of all, I got to hang out with BA friends, as well as meet new friends and put faces together with people whom I've only known as forum names. Great fun!
That was FUN!!
The venue was fantastic, much better than I ever would have expected, the sound was pretty darn good in the small rooms, there was a bunch of stuff new to the show, and lunch was great!
But best of all, I got to hang out with BA friends, as well as meet new friends and put faces together with people whom I've only known as forum names. Great fun!
Very awesome ! Thank you to Mike and of course everyone who made the festivities worthy of such a following.
extruded aluminum is very expensive. for 180w/ch, consider the pic in Nelson's PLH article.. just bigger. Industrial, sure.. but that's an industrial need! And it can be locally sourced and scalable. example.. 14x12 3/8" plate bolted to 48" of 2x4 by .25 wall rectangular tube is about 20 lbs. Probably about $75 locally retailed, at least where I am. What its exact capacity is I dunno, but certainly well above 120w. Wouldn't hurt to make it even bigger. And as Mick Jagger is wont to sing.. Paint it Black.
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Got it - thanks! I looked for it there but missed it somehow. Must be getting old or not enough coffee. Or both. Thanks again.
Forced air cooling should not be a taboo IMHO. There are whisper quiet 120mm fans out there that can be run on lower than nominal voltage for extra quietness too. An array of them could reduce the metal sinking bulk very much.
If I decide to build this amp I will definitely use some quite cooling fans. Why not make the amp a reasonable size using fans?
In addition to forced air cooling with fans, I am toying with building the amp into a 24"-28" tall vertical metal structure that doubles as a speaker stand. There would be plenty of metal surface to dissipate the 100 or so Watts, and my "bookshelf-size" speakers need the height anyway. Kinda like a modern field coil. Has this been DIY'ed before and was it successful?
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