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Newsgroups: rec.audio.tubes
From: "Phil Allison" <philalli...@tpg.com.au>
Date: Mon, 7 Jun 2004 20:49:23 +1000
Local: Mon, Jun 7 2004 6:49 am
Subject: Re: OT: MOSFET question
"Patrick Turner" <i...@turneraudio.com.au > A liar is someone who *knows* the truth about something, but deliberately ** Not so. A lie is a falsehood, a liar is a purveyor of falsehoods - > states a conflicting story, thus decieving the recipient with malice, or > spurious or mischievous intent. all the worse in a public forum. When someone shows a reckless disregard for facts and logical reasoning in > Perhaps Our dearest Denis has simply got his wires crossed, ie, he is ** Our Denis is pushing some personal barrow - the content of that messy genuinely > unaware of the reasons behind your claims to what are facts as you consider them > to be. barrow is dribbling out presently. > > > What is the behaviour of ME amps, in your experience? > > ** ME amps are a closely guarded secret - they all return to their > I have serviced two ME amps in the last 5 years. > Not everyone tries to return them to the maker for service. ** They may have discovered that their maker charges like the proverbial wounded bull. > TW loves to say the ME amps have no global FB. ** Bit like saying the earth is flat and we should all fall off if it were not. > He gets on the audiologically correct bandwagon, well, he thinks he's on ** TW is a parrot - but of a different feather. it, > but the wagon is a very dilapidated old bomb.... He is Peter Stein's well trained parrot. > ME became liquidated last year, and went out of business, and ** ME refuse to assist outsiders with service - even TW is an outsider. > ppl wanting service would simply take them to where is convenient. Magician's must not reveal their tricks to the hoi polloi. > > ** Only a wanker adds a VI limiter to a Hitachi mosfet stage. ** The choice of zener voltage is important if you expect mere fuses to > I have a zener voltage limiter to make sure the gates don't cop too much save TO3 mosfets internal fuses from near shorts under full drive. > I also have 6 amp diodes from the output to each rail to make sure that ones serve no purpose. > BJTs sure don't like having current forced through them backwards. > In my 300 watt amp, I would not be happy with just the existing 12 volt ** Correct. internal > zener diode vgs limiters, lest too much power be allowed to be made into low value loads, > with a correspondingly too high amount of dissipation in the devices. > I leant it to a guy for PA use and he couldn't kill it. ** PA folk have great difficulty killing mosfet amps - only the most determined have ever succeeded. ............. Phil You must Sign in before you can post messages.
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