Trevor Wilson wrote:
>
> "Patrick Turner" <info@[EMAIL PROTECTED]
> wrote in message
> news:4813556D.630051DD@[EMAIL PROTECTED]
> >
> >
> >
>
> ****************************************************
> > I never read what Trevor says about ME amps or the way transistors are
> > matched
> > because its all empty sales talk and utter BS.
> ****************************************************
>
> **Read the above very carefully. THIS is exactly what I am talking
about.
> Every tech on the planet claims to know more about ME amplifiers than
Peter
> Stein does. They WILL NOT fit critically matched devices, even when
> specifically instructed to do so. They will always take the easy (cheap)
way
> out. As a consequence, the performance and reliability of the product
will
> suffer. I know. I've seen the messes that have been created by second
rate
> techs, who think they know it all.
>
> All the schematics in the world will not help, as long as techs think
they
> know more than Peter does about his own product.
>
> I know, from my own experience, that some high Global NFB products
benefit
> from the use of matched devices. In a product with no Global NFB, the
> im****tance of matching becomes far more crucial.
>
> Trevor Wilson
WHAT YOU SAY IS UTTER ****ING BS.
Most techs do not assume they know more than Peter Stein.
In desperation because service manuals are not available, they
may fit whatever transitors can be purchased which have as god as or
better ratings
than those chosen by PS.
The claims you make about the im****tance of accurate hfe matching
between both all
PNP and NPN output or other transistors is a complete load of bollocks.
Good transistor amps function perfectly well with wider tolerances than
you say because of the abundance of
local and other NFB.
But because there is no schematic, no website where what you are saying
is proven
everyone should regard you as a complete ****ing charlatan.
Get off the news group!!!!
ME AMPS ARE JUST ANOTHER PRODUCT.
ANY SECRETS ABOUT SERVICING SHOULD BE DISCLOSED IN COMPREHENSIVE SERVICE
MANUALS
WITH WHATEVER NOTES ARE REQUIRED TO MATCH TRANSISTORS.
Peter Stein probably has a large stock of transistors left over from
since his factory was shut down. He wants to sell them at a high as
possible price.
He and yourself wish to create the utter ****ing BS that ONLY stocks
held by Peter or yourself can
be fitted as replacements.
The market value of old transistors is very low.
Nobody would mind the truth Trevor, and they wouldn't mind
paying Peter for the replacement transistors IF they are priced OK.
And they'd really like a service ****ing manual.
DO NOT BUY ME AMPS UNLESS SERVICE MANUALS ARE MADE WIDELY AVAILABLE
BEFORE YOU BUY ONE.
Allow me a true story about matched devices.
I saw a website offering 2SK369 j-fets for $30 each which were
claimed to be matched within 1%, hence the price.
But I bought a number of these devices on TWO occasions
years apart from WES components at $1.10 each.
All were already within 1% of having the same transconductance of 40mA/V
at 5mA of drain current.
That's standard industry standards.
I used them at the input of phono amps for MC cartridges because they
are
about 20dB quieter than any 12AX7 etc, and ARE linear enough.
No loop FB is used in the amp stage.
There is some 8dB of local current NFB in the source circuit.
But there is MUCH LESS NFB of any kind compared to
anything made by ME.
See my website for full schematic and details.
The gain of the phono amps is within 0.3dB for either channel.
There was utterly no need whatsover for me to purchase
super matched j-fets for $30 each.
Trevor has not told us half the truth about the matched transistor
situation
regarding transistors for ME.
Until he tells the truth, ALWAYS assume he's a liar.
Patrick Turner.
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