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Old 11-01-2013, 05:23 PM
vinyl_junkie vinyl_junkie is offline
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Join Date: May 2005
Location: South East Kent, UK
Posts: 1,832
Bozak out of phase outputs


I have a Bozak CMA 10-2DL which I think has a slight issue.

I have tested it with a signal generator a while back and a oscilloscope and whilst the main output and headphone outs tested ok the tape output was 180 degrees out of phase to the other outputs. Also it doesn't appear to be frequency dependant.

The wiring looks to be ok i.e. the polarity.

I was wondering if the summing amp flips the phase then it's flipped again after the eq? The tape out is pre eq, post summing board.

Those eq's have a lot of phase shift from memory some one told me. From memory they look like a buffered Bandaxall eq with the transistors for makeup gain.
--The future scares me, any chance of a lift back to the past any one?--
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