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palo

AR 77XB 50hz pulley required

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Hi,

Have just aquired a lovely AR77XB TT.

The usual problem it is a 115V 60Hz 300RPM Haydon unit with a 60Hz pulley, therefore runs slow.

I am on the hunt for a 50Hz pulley to correct the dpeed problem, anyone out there have one for sale or know of an option!

I know Vinyl Nirvana has a motor upgrade of a low voltage motor, which I think would fix the speed/voltage/Hz problem, but it is more than the price that I purchased it at with some and somehow does not sit well against its original retail price!

Also how difficult is it to rewire a Grace 707 from the DIN to the cartridge?

Help appreciated.

Regards Palo

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Email the guy at Vinyl Nirvana and ask him if he has a used 50Hz pulley that he can sell you. Given that he is in the US and offers a replacement pulley for that locale, I imagine that he has quite a few.

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Thanks Telecine,

Have contacted Vinyl Nirvana via their email, as yet have not heard back from Dave.

All I can gather is AR produced a 115/230V 60/50Hz model for the Euro's which had a switch under the platter and a 50Hz pulley supplied.

However I am not sure if it was also an aftermarket product from AR.

Seem to think that there may be a different drive belt to suit this 60/50Hz 33.33/45RPM pulley sizes too.

Anyone heard of this scenario?

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That might be correct but I would check with Vinyl Nirvana. They also sell replacement belts so they should know.

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Eureka!

Dave has the copolymer pulley 50Hz pulley version in stock. It is also $95 plus shipping of $16.95USD

You little ripper now just got to work out the voltage step down.

Have also enquired about the belt to suit.

What a wonderful thing the internet is!!!!! especially up here in FNQ.

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Well done, nearly there.

Tortech offer a range of suitable step downs.

Edited by Telecine

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On 5/29/2012 at 10:22 PM, palo said:

Eureka!

Dave has the copolymer pulley 50Hz pulley version in stock. It is also $95 plus shipping of $16.95USD

You little ripper now just got to work out the voltage step down.

Have also enquired about the belt to suit.

What a wonderful thing the internet is!!!!! especially up here in FNQ.

 

 

Palo, All, Howdy,

 

I am going through a similar exercise with an "AR the TT" at the moment.

 

Does anyone know if you can just use a high Wattage wirewound resistor to step down the 240 

to 110V.     The Connoisseur BD1 turntables have been doing that for years.    I am hoping I 

can do that rather than use a step down transformer on the mains.

 

Thks! 

Paul.

 

 

 

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Guest gmdb
4 hours ago, pauly99 said:

 

 

Palo, All, Howdy,

 

I am going through a similar exercise with an "AR the TT" at the moment.

 

Does anyone know if you can just use a high Wattage wirewound resistor to step down the 240 

to 110V.     The Connoisseur BD1 turntables have been doing that for years.    I am hoping I 

can do that rather than use a step down transformer on the mains.

 

Thks! 

Paul.

 

 

 

You'll probably get a better result if you build an off-board power supply for it, and remove all the internal electronics.  I did one for my AR XA and the results were excellent.  I followed the forums on the Naim Armageddon clone and it cost well under $200 including enclosure.  It involves a toroidal step-down transformer with precise capacitor matching for 110V motor to provide greater speed stability by reducing / eliminating clogging in the motor.  And the usual caveats apply - it's working with 240V mains so best to get an electrician mate to check it.  But the same would apply to any resistor step-down. 

 

My motivation for going down this path was to get the old components out from under the top plate so I could do more work on damping the underneath of the top plate and the sub-chassis to reduce resonance.  And given the age of the electronic components I would have replaced many of them anyway.  The original motor however was in great condition. 

 

The ARs are lovely sounding turntables.

 

 

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You could try Duc ( @lovetube on this forum).

I'm sure he could machine a pulley for you and would also be able to help with rewiring the Grace arm.

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14 hours ago, Reverend Johnny Heathen said:

Have you the measurements for the 50hz pulley? I have a few AR pulleys somewhere and I'd be happy to send one your way if it fit the bill... 

 

Thanks , :)

I don't have the measurements.

I bit the bullet and bough the expensive poly one like vinylnirvana.

 

Paul.

 

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