From: "Mark Hathaway"
References: <email@example.com> <firstname.lastname@example.org>
Subject: Re: modeling a water cooling system
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Date: Thu, 24 Oct 2002 21:50:06 +1000
NNTP-Posting-Date: Thu, 24 Oct 2002 07:40:32 EDT
Battery power via a bank of spiral wound sealed lead acid batteries, zero
ripple. Ac sucks.
As to topology choices, if we all used the same thing it would be a very
"Pacific Freight" wrote in message
> Being an audiophile myself, while I can appreciate not worrying about the
> lost heat in exchange for superb amplification, I can't understand why
> someone would want to invest a fair chunk of money for some hard to get
> resistors etc. to make one of these amps.
> The distortion specs are poor, the author himself states that the sound is
> not that brilliant, and I haven't done the calculations, but with such a
> high current drain from the PSU, you would need some absolutely huge
> capacitors to keep the hum down to a minimum. (1 Farad per rail??)
> Class A amplification is great, don't get me wrong, but this design is
> really not the best to go for if you want good sound. There was a 15W
> A amp design in Silicon Chip (July 98) years ago. Now that was a beauty.
> simple, not efficient, and probably not that cheap, but at least it had
> specs. From memory distortion was something like 0.00004% (They mentioned
> that it was so low that it was tricky to measure with their equipment)
> And that amp had a separate mosfet regulated power supply that didn't need
> huge filter caps.(Aug 98) (a must for high current low noise applications
> like this one)
> Seriously, the amps on that site look really great. Big and professional.
> With my favourite blue power lights!! But sound good? No.
> "Phil Allison" wrote in message
> > "Bill Sloman" wrote in message
> > news:firstname.lastname@example.org...
> > ** Bill, have you looked at the "zen" amp itself and why the
> > dissipation is so high ?
> > The whole project is completely loony tunes.
> > . . . . ................ Phil