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Old 1st June 2008, 12:13 AM   #1
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Default Kenwood Ka-770b

Hello,
i have an KENWOOD KA-770B amplifier with a problem .
Some of the transistors from the preamp module have been "blow" ,I have search over the internet to find a schematic for this amplifier but I didn't find anything ....th original amplifier module's have been replaced with bipolar amplifier kit's , about 200w each one .

If anybody have some schematics I would be grateful....






sorry for my english.
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Old 1st June 2008, 12:32 AM   #2
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http://www.manuals-in-pdf.com/KA770/B-p-419908.html

You're English is fine.
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Old 1st June 2008, 10:19 AM   #3
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I have to pay for it, ...the hole amplifier cost me just 25 usd..doesn't anybody have the hole manual for free
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Old 1st June 2008, 10:53 AM   #4
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Without people who collect, collate, and offer the manuals to us, the hobby of vintage audio dies.

Consider it an investment in the health of the hobby, and in your education. If it is worth fixing, it is worth buying a manual for.
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Old 1st June 2008, 05:56 PM   #5
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Here in romania with that money i would buy a new preamplifier... i need the schematic only for the preamp ..... the rest of the amp was trow to the garbage.... so it wouldn't worthed ....
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Old 30th June 2008, 06:58 PM   #6
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Default KA-770

hi dexter,

i can help you out with the schematic from a KA-990. shoundn´t be that much difference.


best regards

manfred
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Old 30th June 2008, 09:31 PM   #7
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Cant you see the missing transistor type at the other chanel?
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Old 3rd July 2008, 06:22 PM   #8
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I have made from scratch a preamplifier with balans and tones controls
, this topic can be closed now ..... thanks for information
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