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Old 17th November 2006, 11:23 PM   #21
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Old 17th November 2006, 11:33 PM   #22
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Old 17th November 2006, 11:47 PM   #23
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Old 17th November 2006, 11:57 PM   #24
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Old 18th November 2006, 07:37 AM   #25
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Hi,
I have seen a reference to BD devices used in the 8000a.
Your output stage looks like it might be one of those.

It would appear you have 2pair of To220 packaged output devices.

When you consider the opposition were using To3 2n3773 in quasi or (worse 3055) then I suppose that is not as bad as it looks.
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Old 18th November 2006, 07:54 AM   #26
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Looks to me to have a current limiter resistor in the output, 3 dual resistor ceramic Nobles do not add up.
The devices read P and N, re-labelled ?

Is there a production date visible anywhere; chassis, electrolytics, toroid ?
Seen :this (post 38) ?
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Old 18th November 2006, 08:51 AM   #27
AndrewT is offline AndrewT  Scotland
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Default pre-power splitting

Hi,
TAG's reply in post 35 is very useful.

How to split the 8000a into pre and power and fit DC blocking.
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Old 18th November 2006, 08:53 AM   #28
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My friends Audiolab 8000A used large Sanken output devices. If I find a pic I'll post it. It's pre-Tag McLaren take over .
I have a list of devices that it used .
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Old 18th November 2006, 11:28 AM   #29
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Thanks everyone for the help, i cant find any links to seperate the pre power supply, but i have taken more detailed photos of the amp and found i think, the most damaged part of the amp see pic.
It shows 4 resistors burnt out but i dont know what damage has been done to the transistors and capacitors around the same area
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Old 18th November 2006, 11:30 AM   #30
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Sorry forgot to say i have ringed in red the parts burnt out.
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