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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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18th Jan 2020, 7:05 pm | #1 |
Diode
Join Date: Nov 2015
Location: Oxford, Oxon, UK.
Posts: 8
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EAR Bantam Reproducer - low speed play issue
This 1957 Bantam repropducer (Collaro single deck) plays fine at 78 rpm, is a bit unstable at 45 rpm. But shift the speed selector to 33rpm and the idler doesn't press onto the motor output shaft. If I press the centre of idler securing screw with a screwdriver the idler connects perfectly. It seems that there is some play in the linkage - on both pivot points. If you see the attached photo I have indicated with my screwdriver where the play is on the left pivot - has anyone overcome this? Is there an adjustment somewhere I can compensate it with or any other work around?
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18th Jan 2020, 7:28 pm | #2 |
Dekatron
Join Date: Jun 2013
Location: East Sussex, UK.
Posts: 3,326
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Re: EAR Bantam Reproducer - low speed play issue
Probably just sticky grease. Clean all the parts so they are free to move easily.
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18th Jan 2020, 8:01 pm | #3 |
Diode
Join Date: Nov 2015
Location: Oxford, Oxon, UK.
Posts: 8
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Re: EAR Bantam Reproducer - low speed play issue
I have cleaned and lubricated the mechanism. There is visible play in the linkage that supports the idler bearing shaft. I can see maybe 1 mm of play around both pivots on the linkage. If I push down on the idler securing screw it works perfectly.
Also if I tilt the deck backwards by 45 degrees that is sufficient to get it working at 33 rpm |
19th Jan 2020, 3:42 pm | #4 |
Diode
Join Date: Nov 2015
Location: Oxford, Oxon, UK.
Posts: 8
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Re: EAR Bantam Reproducer - low speed play issue
I have made some videos so you can see what is happening
This is the idler spinning happily at 45rpm https://vimeo.com/385803676 This is the idler not spinning at 33rpm until I apply a little pressure on the idler securing screw which takes up the float in the linkage https://vimeo.com/385803648 In this one with the idler removed I am pressing the linkage so the float is visible https://vimeo.com/385803600 |