Prime Platter Speed Adjustment

Prime Platter Speed Adjustment

Postby Robes » Fri Sep 08, 2017 2:50 pm

I have spent too much time trying to search for a simple answer which has to be addressed on this forum somewhere but I'm a little anxious and think I'll get a reply before I find it in the next few weeks.

I am about to buy a new Prime but just want to know (without use of an ADS or tach) how I check the speed on the TT when I set it up? I've had many a thousand dollar less TT come with adjustable pitch controls to simply speed-up or slow down the platter speed and those tables had strobe markings (little dots or hash marks) along the perimeter of the platters for doing it.

Is there some adjustment on the motor? Do I have to buy a devise or some type of strobe markings to put on the platter to do this? I'm a bit put off if it's not possible without investing in the ADS, may very well be a deal breaker-

Robes :?:
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Re: Prime Platter Speed Adjustment

Postby Marc » Fri Sep 08, 2017 5:01 pm

Hello Robes,

You would be able to use the provided slip mat to dial in the speed without the ADS. You would just need to use a 60Hz light source.

You would be able to move the motor closer or further from the turntable to adjust speed and you would be able to move the belt up and down the groves of the pulley to adjust speed.

If you are looking for a more precise calculation you can purchase a standalone strobe disc and strobe light.

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Re: Prime Platter Speed Adjustment

Postby spinblackcircle » Fri Sep 08, 2017 5:08 pm

There are also plenty of SmartPhone apps available from Free to $2 that will get you in the ballpark.

That being said, after purchasing the KAB SpeedStrobe, I find it necessary for almost any Vinyl Enthusiast.
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Re: Prime Platter Speed Adjustment

Postby Okwute » Mon Sep 11, 2017 8:48 pm

spinblackcircle wrote:
That being said, after purchasing the KAB SpeedStrobe, I find it necessary for almost any Vinyl Enthusiast.

+1 The KAB SpeedStrobe IMHO is a MUST in every Vinyl enthusiasts toolbox whether you have the SDS/ADS or not. Highly recommended.
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Re: Prime Platter Speed Adjustment

Postby JimTimP » Tue Sep 12, 2017 8:40 am

To expand on what Marc was telling you. The pulley on the motor has those additional belt grooves for a reason.They are a slightly different diameters, and will thereby change the turns ratio between the motor and the platter slightly. Start with the belt in the middle pulley position. Go up to the top one if you need to speed up slightly, down to slow down. Won't be much, but you shouldn't need it unless the line frequency at your house is off.

If you need greater precision, then and ADS/SDS or used Phoenix is they only other alternatives.
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