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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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1st Mar 2021, 9:24 am | #1 |
Moderator
Join Date: Feb 2006
Location: Wembley, Middlesex
Posts: 7,225
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BSR UA6 switching off, or rather not
I've just serviced this for a Pye Black Box what I find is that more often than not, after the last record has been played, the arm will go back to its rest, but the motor fails to switch off.
Does anyone know what causes this? The spring and the connecting wire are correct and doing their job. |
1st Mar 2021, 10:37 am | #2 |
Dekatron
Join Date: Sep 2015
Location: Southwold, Suffolk, UK.
Posts: 8,340
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Re: BSR UA6 switching off, or rather not
Sounds like a lack of Torque from the 10" pressed steel platter. Does it still do this on 78rpm records?
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Edward. |
1st Mar 2021, 11:00 am | #3 |
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Join Date: Feb 2006
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Re: BSR UA6 switching off, or rather not
Plenty of torque, even does it with a stack of 78's
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2nd Mar 2021, 12:54 pm | #4 |
Heptode
Join Date: Sep 2014
Location: Coventry, West Midlands, UK.
Posts: 519
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Re: BSR UA6 switching off, or rather not
The wire from the spring at the bottom of the control arm to the switch off lever needs to be adjusted. Too slack and it won't pull the lever over the stud that stops the pickup arm movement, too tight and it won't release it.
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2nd Mar 2021, 2:09 pm | #5 |
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Join Date: Feb 2006
Location: Wembley, Middlesex
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Re: BSR UA6 switching off, or rather not
I did check the wire link but it wasn’t that.
What I found is that spring tension on the lever that operates the switch was too high, so I swapped it for a spring with lower tension and that seems to have cured it. |