AR EB101 turntable

american simplicity
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michael maurice
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AR EB101 turntable

Post by michael maurice » 11 Aug 2019 00:04

I was asked to look at this turntable because the belt kept slipping off and sometimes the motor went backwards.

I obtained a new oem belt which was 186mm diameter, 4mm wide, but there isn't enough torque for the motor to start it.

I've also replaced the 0.82uF capacitor with an X2 275V replacement.

I presume the motor has failed. Can it be repaired, if so how, if not what is a suitable replacement? I'm in the UK so electric supply is 240V 50Hz.

MikeyB456
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Re: AR EB101 turntable

Post by MikeyB456 » 31 Aug 2019 16:57

The EB101 in the UK came in at least 2 variants. Early ones had a plinth with a frame-like construction, and (I think) had a 12-pole motor. Later ones had a plinth with an all-over black vinyl 'veneer', and a 24-pole motor. The pulley size is therefore different, and so the belt size is different between the two.

So my first question is: which version do you have, and do you have the right belt?

As to the motor not having 'enough torque' - does it stall? It might if the belt is too tight. Alternatively, it might be that the belt is simply slipping on the pulley. In this case, coating the belt with talc is recommended to improve grip for start-up.

The belt will slip off if the subchassis isn't level, or if the motor spindle isn't properly vertical. The subchassis can be levelled by adjusting the nuts on the spring support bolts. The motor can be levelled by shimming its support bracket. It's fairly easy to see what's going on if you fit the platter upside down.

HTH!

MikeyB456
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Re: AR EB101 turntable

Post by MikeyB456 » 31 Aug 2019 17:22

Here are pics of the two versions:
large pulley.jpg
Large pulley
(384.91 KiB) Downloaded 38 times
small pulley.jpg
Small pulley
(217.55 KiB) Downloaded 38 times

lenjack
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Re: AR EB101 turntable

Post by lenjack » 31 Aug 2019 17:53

Many folks still think the original iteration AR table was the very best of the lot, and was/is unsurpassed.

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