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From: Eeyore on 11 Aug 2006 13:46 Mark Fortune wrote: > Dave Plowman (News) wrote: > > In article <44db929f$0$31649$db0fefd9(a)news.zen.co.uk>, > > Mark Fortune <mark(a)fortrex.co.uk> wrote: > > > >>Thanks to all those that offered their advice however, it's been > >>insightful to me, and I certainly wont give up the opportunity to build > >>my own transformers in future... just not on such a power crazed level > >>where there are better solutions. > > > > > > I'd also query the need for such a large bench top supply - unless you're > > regularly repairing or building things like power amps. > > aha, you've discovered one of my planned future hobbies :) > any money in it though? Not as much as you might think. Graham
From: Eeyore on 11 Aug 2006 13:48 Jim Thompson wrote: > On Fri, 11 Aug 2006 11:31:13 +0100, John Woodgate > <jmw(a)jmwa.demon.co.uk> wrote: > > >In message <44dc500f$0$7951$db0fefd9(a)news.zen.co.uk>, dated Fri, 11 Aug > >2006, Mark Fortune <mark(a)fortrex.co.uk> writes > > > >>aha, you've discovered one of my planned future hobbies :) > >>any money in it though? > > > >Yes, you'll spend quite a bit. > > > >Everybody and his dog makes power amplifiers. Try something else (which > >is small-signal and thus less likely to emit flames and smoke). For > >example, low-level active crossovers; 2-way, 3-way, 4-way, Butterworth, > >Linkwitz-Riley, Bessel, transitional Gaussian, Thiele.... > > > >Enough to keep you busy for 50 years. And there isn't a great deal of > >competition, at sensible prices, so you could sell a few on Ebay. There > >is other low-level stuff which, compared with power amps, is a doddle to > >get working if you master the design mathematics. > > > >And you only need a +/- 12 V power supply at 10 mA. (;-) > > Is there REALLY a market for active crossovers? In the pro-audio market for sure. Graham
From: Eeyore on 11 Aug 2006 13:47 John Woodgate wrote: > In message <44dc500f$0$7951$db0fefd9(a)news.zen.co.uk>, dated Fri, 11 Aug > 2006, Mark Fortune <mark(a)fortrex.co.uk> writes > > >aha, you've discovered one of my planned future hobbies :) > >any money in it though? > > Yes, you'll spend quite a bit. > > Everybody and his dog makes power amplifiers. Try something else (which > is small-signal and thus less likely to emit flames and smoke). For > example, low-level active crossovers; 2-way, 3-way, 4-way, Butterworth, > Linkwitz-Riley, Bessel, transitional Gaussian, Thiele.... > > Enough to keep you busy for 50 years. And there isn't a great deal of > competition, at sensible prices, so you could sell a few on Ebay. There > is other low-level stuff which, compared with power amps, is a doddle to > get working if you master the design mathematics. > > And you only need a +/- 12 V power supply at 10 mA. (;-) 10mA ? That'll power a pair of 5532s ! Graham
From: Jim Thompson on 11 Aug 2006 13:53 On Fri, 11 Aug 2006 12:30:35 -0500, Bud-- <remove.BudNews(a)isp.com> wrote: >I ran across info on rectifier design up through filtering (but not >regulation) at: >http://www.ieeta.pt/~alex/docs/ApplicationNotes/Rectifier%20Applications%20Handbook.pdf >It is: Rectifier applications handbook - 272 pg - 2MB > From a brief scan it looked very good and more than anyone here wants >to know about rectifiers, including the physics. > Good link, Bud! Thanks! ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: John Woodgate on 11 Aug 2006 15:20
In message <44DCC2E8.694A7582(a)REMOVETHIS.hotmail.com>, dated Fri, 11 Aug 2006, Eeyore <rabbitsfriendsandrelations(a)REMOVETHIS.hotmail.com> writes > > >Jim Thompson wrote: > >> On Fri, 11 Aug 2006 11:31:13 +0100, John Woodgate >> <jmw(a)jmwa.demon.co.uk> wrote: >> >> >In message <44dc500f$0$7951$db0fefd9(a)news.zen.co.uk>, dated Fri, 11 Aug >> >2006, Mark Fortune <mark(a)fortrex.co.uk> writes >> > >> >>aha, you've discovered one of my planned future hobbies :) >> >>any money in it though? >> > >> >Yes, you'll spend quite a bit. >> > >> >Everybody and his dog makes power amplifiers. Try something else (which >> >is small-signal and thus less likely to emit flames and smoke). For >> >example, low-level active crossovers; 2-way, 3-way, 4-way, Butterworth, >> >Linkwitz-Riley, Bessel, transitional Gaussian, Thiele.... >> > >> >Enough to keep you busy for 50 years. And there isn't a great deal of >> >competition, at sensible prices, so you could sell a few on Ebay. There >> >is other low-level stuff which, compared with power amps, is a doddle to >> >get working if you master the design mathematics. >> > >> >And you only need a +/- 12 V power supply at 10 mA. (;-) >> >> Is there REALLY a market for active crossovers? > >In the pro-audio market for sure. > Not only. Of course, all the while the consumer industry can get away with a 2 uF in series with a tweeter with no magnet to speak of, why bother with active crossovers? But these things DO percolate down. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK |