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Need a AR-XA measurement please...

I meant the outer rim. I noticed that Pjsjr's XA in another thread has a mirror polish. That would look nice as long as I won't do further damage. Would I need to clearcote it after cleaning?
 
Once I got my platter cleaned up I finished with Mothers Mag Wheel Polish. It looks great if you ask me. The only downside that I can see is that when I take the outer platter off to change the speed, fingerprints really show up. It makes me want to polish it again. I just don't bother playing 45 rpm material on my XA.
I'm not sure how much it will change a spot that is tarnished, though. Mine had one of those mats that turns into goo. I scraped that off but there was staining that I can't get off. I tried the Mothers, but it did nothing. It doesn't bother me much since it is almost all under the replacement mat I put on.

Great work on the table, by the way. It never ceases to amaze me what gets done to these tables.
 
KrisM said:
. Mine had one of those mats that turns into goo. I scraped that off but there was staining that I can't get off. I tried the Mothers, but it did nothing. It doesn't bother me much since it is almost all under the replacement mat I put on.

Great work on the table, by the way. It never ceases to amaze me what gets done to these tables.
Click to expand...

On those platters I use Goof-Off and let it dry....repeat several times.
That floats the embedded rubber mat particles to the surface, and then I sand. 220 and then 320. I've had platters that were almost completely black come very clean. Some pitting will remain though.
 
Thanks for the tip. Like I said, most of it is under the mat so it isn't a big deal to me. I'll get at it some day. I've also got a Sony platter that has some staining. The mat is fine, so I'm not sure where it came from. Is Goo Gone the same as Goof Off by any chance? I think I have some of that here.
 
KrisM said:
Thanks for the tip. Like I said, most of it is under the mat so it isn't a big deal to me. I'll get at it some day. I've also got a Sony platter that has some staining. The mat is fine, so I'm not sure where it came from. Is Goo Gone the same as Goof Off by any chance? I think I have some of that here.
Click to expand...



Goo Gone, I believe is a citrus based solvent. I use that to remove tape residue and such and it's "non-toxic". Goof-Off on the other hand is petrol based, highly toxic, and will create a nasty fire if you light it. It sure does raise the rubber though. Don't get it on something plastic unless you want to change its looks.:nono: I don't open it in the house.
 
Magnetic end of play auto-lift

I was reading the thread about the "Q-Up" tonearm auto-lifter, and after some googling I came accross a magnetic lifter that someone overseas dreamt up.
His design hovers over the tonearm and is actuated by a small pivot arm with a 'feeler' that brings the neo magnet into a magnetic field with a iron piece affixed to the top of the tonearm at the end of play. It then picks up the arm.
I have some small neo magnets laying around, so I went to work on a variation that lifts the arm from the rear and below the arm stub. The arm stub is non-ferrous metal, but I already plugged the stub with high density foam, so I cut a slit in the foam and inserted a small neo magnet near the bottom of the stub.
I first made a mockup out of wood to make sure it would work as I imagined, then fashioned the final version from stainless and aluminum. Lots of Dremel work! Here's the end result, it works great!

ArmLift1.jpg


ArmLift2.jpg


ArmLift3.jpg
 
It looks like the springs are now standing, while stock they are hanging.


Ben aka MacKat
 
Oh, I get what you're asking now. Those pics are of marcmorin's setup jig for finding proper spring balance. It was essential for getting my out of whack subchassis balanced with the brass weight.
 
jimreeves said:
Oh, I get what you're asking now. Those pics are of marcmorin's setup jig for finding proper spring balance. It was essential for getting my out of whack subchassis balanced with the brass weight.
Click to expand...

Just to clairify to other readers, I set up all sprung tables this way. It's the easiest way I've found to make sure load vs compression rate is 99.9% correct. A little fine tuning of the perches after installation in the table and I'm done. No masters degree in the "linn black arts" needed. :thmbsp:
 
jimreeves said:
What would anyone here suggest that I use to polish the platter? If I do, will it remove a coating that would need to be reapplied?
Click to expand...

Bump up to the merril mod acrylic platter and led mat....the periphery clamp is a nice finish off, but my SAE 1000 lt (which I believe has the same body as your 900 lt) does not clear it, requiring one miss the first 1/16 of an inch or so of the album. My Shure just clears it, as does the Ortophon OM 30.

Russellc
 
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