Cartridges, styli, and confusion

american simplicity
andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 29 Jun 2019 15:21

I should have both the motor and the pulley Monday. I'm going to drill and countersink 2 holes to mount the motor and use black oxide screws (I think 6-32 is the size). They should be almost invisible...

andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 30 Jun 2019 22:00

I have drilled and countersunk the new holes for the Hurst A3001-001 motor:
45887
and here's the engineering drawing for the A3001-001:
45888

derspankster
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Re: Cartridges, styli, and confusion

Post by derspankster » 01 Jul 2019 01:17

Thanks for the updates. Is that the repaint job of your top plate?

lenjack
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Re: Cartridges, styli, and confusion

Post by lenjack » 01 Jul 2019 01:30

If all you had to do was replace the motor because the shaft was bent, why did you need to drill new holes, or did i miss something?

andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 01 Jul 2019 03:53

lenjack wrote:
01 Jul 2019 01:30
If all you had to do was replace the motor because the shaft was bent, why did you need to drill new holes, or did i miss something?
I replaced the motor for the bent shaft and erratic operation (running backwards). I bought a new 'replacement', a Hurst A3001-001, which has a larger mount and shaft, so not a perfect replacement. I suppose I could have looked harder to find an original motor but there's no guarantee it would be any good. I decided to use the same motor most people use.

andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 01 Jul 2019 03:56

derspankster wrote:
01 Jul 2019 01:17
Thanks for the updates. Is that the repaint job of your top plate?
Yes, I just cleaned it and used spray paint — I tried to find something that I thought would closely match the original (though I really don't know what that is so I just looked for a dark brown). It looks like I'm going to have to touch it up...

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Re: Cartridges, styli, and confusion

Post by andrew678122 » 01 Jul 2019 04:02

andrew678122 wrote:
01 Jul 2019 03:53
lenjack wrote:
01 Jul 2019 01:30
If all you had to do was replace the motor because the shaft was bent, why did you need to drill new holes, or did i miss something?
I replaced the motor for the bent shaft and erratic operation (running backwards). I bought a new 'replacement', a Hurst A3001-001, which has a larger mount and shaft, so not a perfect replacement. I suppose I could have looked harder to find an original motor but there's no guarantee it would be any good. I decided to use the same motor most people use as a replacement.

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Re: Cartridges, styli, and confusion

Post by derspankster » 01 Jul 2019 12:19

andrew678122 wrote:
01 Jul 2019 03:56
derspankster wrote:
01 Jul 2019 01:17
Thanks for the updates. Is that the repaint job of your top plate?
Yes, I just cleaned it and used spray paint — I tried to find something that I thought would closely match the original (though I really don't know what that is so I just looked for a dark brown). It looks like I'm going to have to touch it up...
I got rid of the sandy finish on both of mine. Stripped and sanded the top plate. On one I did a flat, matte black finish with rattle cans. Took a couple of tries to satisfy me on that one. Painted it in the garage under less than pristine conditions. The other I painted in a friends paint booth under ideal conditions using automotive black paint (2 coats) and then 3 coats of clear for a piano black mirror finish. Looks great but shows every last speck of dust. The one with the matte finish is much better in that regard.

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Re: Cartridges, styli, and confusion

Post by derspankster » 01 Jul 2019 13:42

I should have included some photos with my previous post.

The first picture is of my second XA, modified to mount a Jelco 370 tonearm, new heavy springs, mass loading of the suspension, with a high gloss black mirror finish. My Denon DL-110 is usually mounted in this one.

The second picture with the matte black finish, new tonearm wand and other modifications performed by Marc Morin. I run a Grado Gold2 in this table 90% of the time.

The last picture is of my original XA before restoration.
Attachments
Jelco_ARXA1.jpg
ARXA with Jelco
(55.77 KiB) Downloaded 48 times
modified_original.jpg
Original after restoration
(32.6 KiB) Downloaded 49 times
arxa_old.jpg
Original before restoration
(64.41 KiB) Downloaded 48 times

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Re: Cartridges, styli, and confusion

Post by lenjack » 01 Jul 2019 14:25

andrew678122 wrote:
01 Jul 2019 03:53
lenjack wrote:
01 Jul 2019 01:30
If all you had to do was replace the motor because the shaft was bent, why did you need to drill new holes, or did i miss something?
I replaced the motor for the bent shaft and erratic operation (running backwards). I bought a new 'replacement', a Hurst A3001-001, which has a larger mount and shaft, so not a perfect replacement. I suppose I could have looked harder to find an original motor but there's no guarantee it would be any good. I decided to use the same motor most people use.
OK, I understand now. I originally thought it was an exact replacement motor. #-o :)

andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 01 Jul 2019 22:16

derspankster wrote:
01 Jul 2019 13:42
I should have included some photos with my previous post.

The first picture is of my second XA, modified to mount a Jelco 370 tonearm, new heavy springs, mass loading of the suspension, with a high gloss black mirror finish. My Denon DL-110 is usually mounted in this one.

The second picture with the matte black finish, new tonearm wand and other modifications performed by Marc Morin. I run a Grado Gold2 in this table 90% of the time.

The last picture is of my original XA before restoration.
Wow, nice job on both of them I really like the black gloss one...

andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 01 Jul 2019 23:52

New Motor and pulley:
45893
45892

As I started putting the AR XA back together I ran into a problem. I had gotten a copy of what looks like a type-written service 'manual' and it has the procedure for adjusting the suspension: "With a heavy record in place adjust the three suspension nuts until the bottom edge of the platter rides 1/8" above the deck."

On my TT if I do that then the reinforcing ribs on the underside of the outer platter hit the top of the Vinyl Nirvana pulley. Okay so just adjust the Tee higher. Then the Tee is contacting the top plate at the tone arm and the grommet for the tone arm wires is enclosed by the Tee, if the tone arm wires were there they would be pinched between the tone arm and the top plate. With the Vinyl Nirvana pulley on the Hurst A3001-001 motor and the motor screwed directly to the top plate the pulley sits too high. I guess that it would probably be okay if I used a thick plastic spacer/adapter as others have done, but I didn't, I just drilled new mounting holes in the top plate. Sooo I checked the pulley and found the hole for the motor shaft is a blind hole and only about halfway through the plastic. A few minutes, one drill press, and an 1/8" drill bit later the hole was about three quarters through the plastic. The belt surface on the inner platter is wide enough to accommodate the adjusted pulley position. The pulley now slides about 3/16" further on the motor shaft lowering it away from the reinforcing ribs on the underside of the platter. I now have clearance there and the Tee can be lowered getting some space between it and the underside of the top plate.

andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 03 Jul 2019 21:59

Against all odds I have gotten it back together and I didn't even lose any pieces!

I have some jumper wires connecting the tone arm wires to the RCA plugs from my amp. I put a test record on it and it plays! I have no pad on the platter, it still has the screwed up cartridge and stylus, it needs a preamp, and it needs the tone arm wires fed through the grommet and soldered to the RCA jacks (but I don't want to do that until I go through the tone arm again to make sure it's adjusted properly).
45908
I'm as happy as pig in... whatever!

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Re: Cartridges, styli, and confusion

Post by lenjack » 03 Jul 2019 23:10

Do you have the plastic tool that AR originally supplied to adjust the stylus overhang? It looks like this.

https://www.ebay.com/itm/Pats-Audio-XA- ... 2360635114

andrew678122
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Re: Cartridges, styli, and confusion

Post by andrew678122 » 03 Jul 2019 23:19

lenjack wrote:
03 Jul 2019 23:10
Do you have the plastic tool that AR originally supplied to adjust the stylus overhang? It looks like this.

https://www.ebay.com/itm/Pats-Audio-XA- ... 2360635114
Wow! I'll probably try to make my own...

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