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In Reply to: Build a vintage idler.... posted by tubesforever on April 26, 2007 at 23:18:10:
I think the only new table I would buy would be the Technics. Then again I'm nowhere in the price range of a P9. Its not even a dream I have to one day own one. Its $4,500 bucks for cryin out loud. I'm sure it would completely violate the Technics. At 10X the price it better. Maybe not, I dunno.Here's what I did and I'm very happy:
I bought a Technics as a stake in the ground. Its a rock solid table that will hold its own with anything up to many times its price. I know I'll always have at least that quality of a table. I then ventured into the world that Tubes mentioned -- restoring vintage tables. I've got a Rek O Kut Idler, an Empire 598 belt and a homemade belt table that uses a Rek O Kut platter and bearing. If I had to get rid of all but one it would be a toss up between the Rek O Kut Idler and the Technics. I think the Rek O Kut sounds better, but I just love the Technics too much to get rid of it. Also, I really want to hear it with the new power supply.If you can get a P9 for a steal ... I dunno. I guess it depends on how much of a steal you can get it. Even a steal would be ~$2K right? I don't really know what they go for used. Like I said, waaaaay out of my price range. If you got the $Ks to spend, you could do what I did. Get it as your stake in the ground and start playing with the vintage idlers.
Either way you go, its a good delima to have.
Follow Ups:
With a polished bearing and silicone nitride ball.Then use the Pabst motor instead of the shaded pole motor.
RayOStat is using a Pabst motor on his VPI turntable. This is one rocking VPI by the way....and he said the Pabst motor rocked his world.
Send me a platter and I will get it polished up for you. You need to hear a ROK with a micropolished main bearing.
I have a Rek O Kut - L34. I thought those used the Pabst motor. I never bother to investigate because I assumed this was the case. Am I wrong? If so, where do you buy one? Do you just wait for them to come along on ebay?Thanks again
Also the B12GH which I have one but am not sure that I like all that much.I have three of these Pabst motors now. I just need to know all the tweaks Mosin did with his! He says he got it even more quiet than stock which is really great.
This is what a Pabst motor looks like. Square, hysteresis motor, with a falsing cap to provide three phase 120V operation.
Hello
Great discussion, I just finnished a base for my REK O KUT K33, and I did use a Pabst from a N33H table that I bought for $2.
I see the discussion about the platter bearing, has anyone out there had a new bearing well or shaft remade to tighter tolerances?
Mine is pretty good a little slop with no oil but good with oil.
Also, My speed is slightly fast running the Pabst motor, anyone out there seeing the same thing ? I was thinking of having the motor shaft polished. any ideas ?
bob
I've been meaning to take your advice on this subject, but I've been busy building those speakers I mentioned earlier. by the way, I replied to you with a couple questions down the way a bit on that thread. I don't mean to be pushy, I just wasnt' sure if you were planning to revisit that particular thread so I mention it here. I'd appreciate your thoughts on that.Back to the subject at hand:
Where do you get the silicone nitride ball? How much?
I think you just answered my other question, but I guess when you say micropolish the bearing, you are refering to the shaft attached to the platter? Or are you refering to the bearing well, or both? I appreciate your suggestion to send you the platter, but I would prefer to do it locally if possible. You mentioned before to give it to a machine shop I think. Will just any old machine shop do or is there a place in particular you use? I don't really know where to begin with that and how do you communicate to them what you want? I suspect they get relatively few requests for vintage table bearing micropolishing.
Thanks for your thoughts on this!!!
... like I did.Mike
I don't know much about boca bearing.
A package of two silicone nitridge balls is less than 15 dollars shipped to your door.I have been using the 9/32 balls, but these are a little taller on some Rek O Kuts. The 1/4 inch balls would be fine.
Since I machine off the thrust surface and then polish it, the extra height of the 9/32 ball works beautifully for my applications.
The way to describe this to the machine shop is to take a measuring caliper and the main platter and bearing to the shop and begin taking measurements up and down the shaft.
If this is a good shop they will get interested and immediately find a caliper set for 10,000's of an inch.
Tell them that you need it polished to the lowest point and no more.
CAUTION....they might give you a silly look.....The Rek O Kut main bearings will have a run out of say 0.0007 inches. So you are asking them to polish out one thirtieth of a human hair.
Most will not want to do the work. It is not hard, its just not what the shop does for a living. They need to press out the bearing (easy) and machine the thrust surface flat and smooth. Then polish the main bearing so it measures exactly the same from top to bottom.
We are using a polish compound equivalent to what a jeweler would use for finish polish work on fine gold jewelry. That way we can polish for a minute and remove very little surface metal.
Most of the 20 minutes time was taken up making the measurements. We turned the lathe at 600 rpm and the dremel on steroid type polishing motor has a 2200 rpm motor. We use a hard cotton polish head and take it down to straight.
Here is the motor.
I am using Mobile 1 0-40 weight motor oil...yes 0 to 40. This is not as thin as water, but it is really thin for a motor oil.
nt
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