Where to get replacements for these transistors? (labeled Vincent) - diyAudio
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Old 27th October 2003, 10:01 PM   #1
BrianGT is offline BrianGT  United States
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Default Where to get replacements for these transistors? (labeled Vincent)

These are from an Audio Refinement amplifier, from a friend of mine, which blew up a channel over the weekend. I can't seem to locate any datasheets for these. A couple of the output devices are shorted out.

Anyone know any information about these Vincent devices? I have never heard of the company, and haven't been able to find anything on google.

The only thing that I have found is a HK company called Vincent Master:
http://www.hkexporter.net/electronic...r/vincent.html

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Old 27th October 2003, 10:14 PM   #2
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Default Re: Where to get replacements for these transistors? (labeled Vincent)

Quote:
Originally posted by BrianGT
These are from an Audio Refinement amplifier, from a friend of mine, which blew up a channel over the weekend. I can't seem to locate any datasheets for these. A couple of the output devices are shorted out.

Anyone know any information about these Vincent devices? I have never heard of the company, and haven't been able to find anything on google.
Hi Brian

Check:

http://www.vincent-tac.de/home2.htm

Regards
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Old 27th October 2003, 10:57 PM   #3
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Default Re: Re: Where to get replacements for these transistors? (labeled Vincent)

Quote:
Originally posted by Tube_Dude


Hi Brian

Check:

http://www.vincent-tac.de/home2.htm

Regards
Are you sure that is the company that made the output devices? I am trying to find datasheets for these.

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Old 27th October 2003, 11:15 PM   #4
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I looked at that page and I don't think they have anything to
do with your transistors. I tried to help you out myself, using
www.chipdir.org, but that is mainly for ICs and somewhat
difficult to navigate unless you have an IC part number. They
do have lists of manufacturers, often with historical information
that a company is now taken over by another one etc., but if
they don't make ICs, they seem not to be on that list. I tried
some links from there to, including some asian electronics
manufacturer search engine. The only thing I came up with
there was a HK base company called "Vincent Gain", they seem
not to manufacture semiconductors, though, only electronic
products. Besides, unless I misremember the time stamp on
you transistors, this company wasn't even old enough to
have made them.
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Old 27th October 2003, 11:29 PM   #5
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Hi Brian!

See also:

http://klausmobile.narod.ru/industri...complete_e.htm
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Old 27th October 2003, 11:55 PM   #6
BrianGT is offline BrianGT  United States
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I am guessing that they are rebranded transistors, (maybe toshiba?). I am not sure.

Here is a picture of a diode that blew up on the board also.

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Old 28th October 2003, 12:04 AM   #7
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Quote:
Originally posted by BrianGT
I am guessing that they are rebranded transistors, (maybe toshiba?). I am not sure.
Very likely I think. Question is what type of company it was.
Amplifier manufacturers may buy components and relabel,
but that is obviously not the case here. If it was just a company
that bought semiconductors, possibly selected batches with
tighter tolerances, to sell under their own brand, then it may
be hard to track if they have been out od business for many
years. I suppose the FI79 marking referes to the manufacturing
year.


Quote:

Here is a picture of a diode that blew up on the board also.
Don't think I've seen anything like that since I tried the empirical
approach to understanding amplifiers at the age of 14 or so,
when not understanding the theory however much I tried.
It taught me two things:
1) The empirical approach is not a fruitful one
2) How to split a BC547 into one two lead component and
one one-lead component, without asserting any external
physical force.


Edit: I just got one idea. Maybe if you can find a repairshop
with some friendly repairman who has been in business for
at least 20 - 25 years, he/she might have a clue. The risk is
he will want to do the repair, of course.
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Old 28th October 2003, 01:11 AM   #8
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hmmm...maybe you could try other transistors...check the driver transistors...are they broken as well??
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Old 28th October 2003, 01:17 AM   #9
Apogee is offline Apogee  United States
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Hi Brian,

Why not just order them from the company or at least ask them directly????

http://www.audiorefinement.com/

Notice at the bottom of the page - Vincent Electronics Co. LTD.....

E-mail: vincent@audiorefinement.com

Distributors:

CANADA
PLURISON 313 Marion - Le Gardeur
J5W AW8 Québec Tel: 00 1 514 585 0098
Fax: 00 1 514 585 5862

USA
AUDIO PLUS SERVICES P.O. BOX 3047 Plattsburgh, NY 12901 Tel: (21) 800-663-9352
Fax: (21) 416-385-0263

Good Luck,
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Old 28th October 2003, 01:17 AM   #10
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Quote:
Originally posted by li_gangyi
hmmm...maybe you could try other transistors...check the driver transistors...are they broken as well??
Problem is, of course, that he cannot track down any info on
them, it is difficult to know what might be an acceptable
replacement. I understand not all of the were broken, so it
is, of course, possible to measure the others, but without
advance equipment that will only tell something about the
most basic parameters.
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