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Old 7th August 2007, 05:24 AM   #1
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Default wanted: Marantz 16 schematic

Looking for a schematic for this old solid state amp. Any sources would be appreciated. Is it worth fixing? Sparky
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Old 3rd September 2007, 01:44 AM   #2
jblmar is offline jblmar  United States
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Well worth fixing.
What's wrong with it?

Ron
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Old 3rd September 2007, 04:57 AM   #3
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Blown transistors. We located exact replacement transistors, but wanted to review the design for problem areas and possible causes for the output transistors to fail (on one channel). We are planning to replace all electrolytic caps, especially dc coupling caps that might affect bias. When I say "we", I am helping a friend who usually works with high end tube gear like Macintosh for example. We have exhausted all sources we can think of for a schematic. Do you have a copy?
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Old 3rd September 2007, 05:33 AM   #4
es44 is offline es44  Denmark
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I've just been lokking through my SM's, and found a service bulletin for the 16. There's a schematic in it, but apart from that, it's mostly changes/updates, that it describes.
If your'e interested, just shoot me a valid email address.

Best regards
Ebbe
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Old 3rd September 2007, 03:20 PM   #5
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Ebbe, I sincerely thank you. My email is:

k7rni (at) arrl (dot) net


Edit: Sparky I have changed it for you. Please let me know if you want the actual address back again. A lot of persons prefer this method. Cuts down on spam.
Cal
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Old 3rd September 2007, 04:18 PM   #6
es44 is offline es44  Denmark
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Dr OM

Ouch, you should have "camouflaged" your email add. Hope you can edit to avoid email-havesting.

Best regards
Ebbe ( oz1esc)
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Old 3rd September 2007, 04:28 PM   #7
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Sparky, please see edit of address above.
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Some of Cal's stuff | Cal Weldon Consulting
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Old 3rd September 2007, 11:01 PM   #8
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Quote:
Blown transistors. We located exact replacement transistors, but wanted to review the design for problem areas and possible causes for the output transistors to fail (on one channel).
One certain possible cause for failure is the fact the unit is about 30 odd years old.
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