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U89
Apr 24, 2021 20:23:42 GMT -6
via mobile
Post by gouge on Apr 24, 2021 20:23:42 GMT -6
Does anyone have a u89 service manual or able to let me know what the audio path caps and output caps are? Type that is, not value.
Also cant find info on transformer.
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Post by EmRR on Apr 24, 2021 20:31:58 GMT -6
same circuit board as the U87AI, maybe a clue there.
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U89
Apr 25, 2021 4:49:40 GMT -6
Post by gouge on Apr 25, 2021 4:49:40 GMT -6
i've been digging and looking into the differences and from what i have been able to understand the dc-dc converter is the same board between the u87ai and the u89 but the rest of the circuit is different.
the u89 looks kinda similar to a schoeps circuit. the u87ai circuit looks the same as the u87. tant cap between transformer and fet.
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U89
Apr 25, 2021 11:33:59 GMT -6
gouge likes this
Post by drumsound on Apr 25, 2021 11:33:59 GMT -6
klaus would probably be the guy to contact.
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Post by timcampbell on Apr 25, 2021 13:10:54 GMT -6
Ask over at groupdiy.com You'll probably have schematics in a minute along with a complete explanation.
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U89
Apr 25, 2021 18:21:56 GMT -6
ericn likes this
Post by Ward on Apr 25, 2021 18:21:56 GMT -6
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