Double Pulley Assembly

[watercourse]

GC - glad to hear it! I notice that Frank (Groovetracer) is using this cart as well on his latest P5 pics.

[james73_2008]

I think what brassnwood is asking is whether you are plugging the PS into a power conditioner or regenerator, rather than directly into a wall.
Sorry to hear about your problems, that really blows.

It's plugged into a 4-way extension socket that's common in the UK. Something a
lot like >> this <<.

It doesn't have surge-protection or anything. Plugging the power supply directly
into the wall is completely impractical. Besides, as I've said, I dont even use the
power supply OL supplied, as it simply made the motor run way too fast.



James H

[Frank_Sm]

GC - glad to hear it! I notice that Frank (Groovetracer) is using this cart as well on his latest P5 pics.

Yes, I do have the 10X5 on my P5 at the moment. I try to use cartridges on my Rega turntables that many Rega owners use. I have the AT150-MLX on my P3 as well.
This allows me to test my products and obtain results that others will experience too.
I just noticed that the Absolute Sound gave the AT150-MLX cartridge of the year. A few years ago J&R Music sold the AT150-MLX for $250 shipped, an absolute bargain.

[taskerc]

After lurking this thread for a while I decided to chime in. Recently bought a P5 at the newly reduced prices Quite nice from the start, but I had bigger plans - not all smooth sailing mind you. Got the TTPSU and found it tightened up the sound generally. Then got Michael's double pulley, silicone belts and counterweight. Again, more improvement, definition. But, still some noise floor to deal with. So I got Frank's Groovetracer Reference platter. Overall, a totally potent combination for me now. The table absolutely sings and I am now experiencing a truly black background for perhaps the first time. Magic. At the moment am running a Garrott K2 MM. Also have a Denon DL103r nuded and in an Aluminium body and an AT150MLX. Each cartridge has real character now. The AT150MLX is VERY clean and quite precise and neutral. The Denon DL103R is all about silky mids and smoothness and of course the warmth. But right now really enjoying the Garrott - has some real character that is not at all contrived - a very nice presence and nice balance.

So thanks to Michael and Frank for their efforts and innovation - they have certainly helped me move a good turntable, in stock form, to a much higher level. Can't stop spinning this week and I really need to get more sleep .....

[RoDa]

Sounds a lot like mine, taskerc
Wonderful how these P5s can sing!!
One thing that I din't believe would make a difference was the Groovetracer counterweight, but it made s substantial change in bass and sound image.

Looks like a spaceship straight out of Star-Wars




Regards
Rolf

[Lelolee]

Has anyone had speed problem with the pulley? I got one off Audiogon, and it's the short one. Is there a diffrents between the 50/60 hz. Turntable is running to fast.

[bacobits]

Where are you located?

Short one? Not sure what you mean by that.

Yes, there is a difference between the 50hz/60hz pulleys. If you are in the US you need the 60hz, most other areas except Canada is 50hz. Wrong pulley and it will run fast.

[Lelolee]

On the web sight, there is a 50HZ short, and a 60Hz long. I'm in Atl GA. I have the wrong one thank's

[Alec124c41]

The different lengths are for different model turntables. The different cycles use different diameters. If you have a 50-cycle pulley in the USA, the speed will be 20% too fast!
If you need to change, pay attention to the area it was made for. The short one is for decks where the long one will scrape the platter.

Cheers,
Alec

[Etnier]

If this subject has been covered elsewhere, my apologies. I've been reading this thread, and keep running into the same concern. Hoping someone can address it.

In essence, the reason TT designers use a belt drive is as a mechanical filter between the motor and platter. The elasticity of the 'belt' (rubber band) dissipates relatively high-frequency vibration as heat, filtering it out of the mechanical path to the platter.

If you have two belts, you've doubled the mechanical connection between motor and platter, arguably cutting the filtering function by half.

Isn't this a problem???

[bacobits]

Rega is unusual as far as their double pulley. Most of the time there are multiple pulleys employed and a single belt.
Is Rega's setup with 2 belts on a single double pulley a problem? I don't hear it that way. Everything does sound better and I understand your point. I can't answer that.

[Blueguitar]

I've been thinking about upgrading to the double pulley for my p3-24 but have had the same concerns as Etnier - I assume there is a double pulley on the P7 and P9 because the platters have more mass. It seems you would want as little belt as possible - indeed, some manufactures use thread for their high end models. I think that having a double pulley without increased mass in the platter would lead to more vibrations.

[Etnier]

By the way, folks, what's "PRAT"?

[JaS]

I'm pretty sure it stands for 'Pulleys Round And True'. That's why you only ever see it applied to belt drives

Regards,
JaS