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Old 22nd Nov 2020, 2:51 pm   #13
Ted Kendall
Dekatron
 
Join Date: Jul 2008
Location: Kington, Herefordshire, UK.
Posts: 3,657
Default Re: Sony TC161-SD Motor Run Cap

Quote:
Originally Posted by Krolroger View Post
By replacing the motor run cap, I was able to improve the playback speed but it's still half a tone flat on commercially recorded tapes rather than a whole tone. Unfortunately, I have perfect pitch, so that won't do.

The aluminium Kemet version wouldn't fit, so I went with the CBB61 1uF device as recommended by David. Capacitance was well within 5% of its stated value.

As the motor sits across the mains supply, there's no provision for speed adjustment.

The belts are new and not overly tight, so I can only think that the motor/pulleys need lubrication.
A semitone is 6%, well out of tolerance for a decent pre-rec on a high quality deck, I'd have said. I think there's some drag somewhere...
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