C-Audio schematic?
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From: Phil Allison on 4 Jul 2008 23:18 <bob(a)yeruncle.com> >> >>** So YOU have no knowledge of audio amplifier terminology nor the >>slightest idea what "supersonic oscillation " of an audio power amp >>really >>is nor what causes it. > > yes I do, ** Then post *your* explanation in here: We all need a good laugh. -------------------------------------------------------- Audio power amps used in live sound systems can suffer damage from breaking into " supersonic oscillation " which is caused by the following: 1. 2. 3. --------------------------------------------------------- ...... Phil
From: Eeyore on 5 Jul 2008 00:26 Phil Allison wrote: > <bob(a)yeruncle.com> > >> > >>** So YOU have no knowledge of audio amplifier terminology nor the > >>slightest idea what "supersonic oscillation " of an audio power amp > >>really > >>is nor what causes it. > > > > yes I do, > > ** Then post *your* explanation in here: > > We all need a good laugh. Application of Super Sonic Oscillation for Tooth Preparation: Report of 3 Cases Accession number;03A0793496 Title;Application of Super Sonic Oscillation for Tooth Preparation: Report of 3 Cases Author;IWASAKI SATORU(Meikai Univ., School of Dentistry) YAMADA TOSHIHIDE(Meikai Univ., School of Dentistry) MIYAMOTO MEGUMI(Meikai Univ., School of Dentistry) ISHIHARA SACHIYO(Meikai Univ., School of Dentistry) KATAYAMA TADASHI(Meikai Univ., School of Dentistry) Journal Title;Journal of Meikai University School of Dentistry Journal Code:Z0804A ISSN:0916-0701 VOL.32;NO.1;PAGE.168-176(2003) Figure&Table&Reference;FIG.33, REF.13 Pub. Country;Japan Language;Japanese Abstract;The new concept of MI (minimal intervention) has been recommended in recent years. Super sonic oscillation for tooth preparation can be a useful part of MI. In these presently described cases, SONICflex cariex with sonic oscillation for tooth preparation to treat proximal surface caries. Sonicsys Inlay was used in conjunction with composite resin. The new sonic oscillation for tooth preparation and the clinical technique for its use are discussed. As a result, major advantages of this method were tooth preparation using MI, the lack of pain, esthetic results, and safety of preparation. (author abst.) http://sciencelinks.jp/j-east/article/200324/000020032403A0793496.php
From: bob on 5 Jul 2008 20:14 On Sat, 5 Jul 2008 13:18:16 +1000, "Phil Allison" <philallison(a)tpg.com.au> wrote: > ><bob(a)yeruncle.com> >>> >>>** So YOU have no knowledge of audio amplifier terminology nor the >>>slightest idea what "supersonic oscillation " of an audio power amp >>>really >>>is nor what causes it. >> >> yes I do, > > > >** Then post *your* explanation in here: > > We all need a good laugh. > >-------------------------------------------------------- > >Audio power amps used in live sound systems can suffer damage from breaking >into " supersonic oscillation " which is caused by the following: > >1. > > >2. > > >3. > > > >--------------------------------------------------------- > > > > >..... Phil > > > > I'm not that interested in your little game... you have changed the thread from your refusal to refer to HF energy as "RF" , to some little pissing contest on amplifier instability... There are probably dozens of reasons why an amplifier would oscillate, you can't just say "There are 3 reasons"!!!! These 3 reasons would be YOUR preference among a dozen answers, so I couldn't win your little contest. How about one reason that covers all of your possible reasons - "anything that causes an amplifying stage to acquire positive feedback at a gain greater than one." which is the definition of oscillators. Or do you really want me to do a blow by blow diagnosis of every stage... oops there could only be 3 stages!! Or do you want 3 ballpark answers... broken part in feedback network, loss of bypassing capacitor, incorrect load applied, defective chip or transistor, or who knows what! Maybe even bad design causing ground loops... or PA system loops... Look Phil, if you want to prove you know more than me about audio amplifiers go ahead, I don't care. But you still need to admit an amplifier that is oscillating at 75khz is producing RF. You should learn to tolerate other peoples ideas, other people here aren't flying into a blind rage... and get help for your Aspergers syndrome or whatever you have...
From: bob on 6 Jul 2008 23:07
On Mon, 7 Jul 2008 09:03:11 +1000, "Phil Allison" <philallison(a)tpg.com.au> wrote: > ><bob(a)yeruncle.com > >> I can't wait to hear the 3 reasons for 'supersonic oscillations'... > oops... looks like phil the charlatan doesn't have any answers, as usual! he probably wasn't able to google up anything... since that's all he is - a techno-parrot - doesn't actually know anything... just repeats what he can find on the web... kind of reminds me of talking to 12yos in school... Goodbye phil, I don't have any more time to waste on you... hope you get treatment for your Aspergers, it's time to get back to your lonely, empty life!! |