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Post by karma67 on Nov 12, 2022 14:44:09 GMT
Having owned a PMAT-1010 for some years i recently bought a used standard AT-1010 with the intentions of rebuilding it and where i can upgrading the components. If i can match the high performance of the PMAT version i'll be a happy bunny! Here is the tonearm stripped into all its pieces.
The first job i wanted to tackle is to make a new bearing housing spindle bolt.The original one has a loose fit where the horizontal bearings run so i made mine with a tighter tolerance. The original. 8mm diameter head turned and then 6mm diameter turned for m6 thread. Thread cut. Here's the old with the new one which also has a 3mm hole drilled up its length for the tonearm wires to pass through.
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Post by rexton on Nov 12, 2022 19:54:36 GMT
Ah, should be a good thread!
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Nov 12, 2022 19:55:38 GMT
Ah, should be a good thread! Pun-tastic
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Post by karma67 on Nov 12, 2022 20:02:21 GMT
Ah, should be a good thread! Pun-tastic in what way?
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Nov 12, 2022 20:02:58 GMT
Started a thread ......made a Thread?
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Post by karma67 on Nov 13, 2022 15:13:06 GMT
Todays job was to get rid of the headshell locking collar. I have heard this modification is a big upgrade to the arm. The new piece will greatly increase stiffness and rigidity, it also does away with a couple wire connections. The offending pieces to be replaced. Left is the headshell connector which in turn connects to the tonearm via the piece on the right. aluminium round bar being turned down to create the interference fit with the arm tube.Approximately 13mm locates inside the tube. Test fit to check the tolerance Next i drilled a 5mm hole right through its length to take the tonearm wires,this is opened out to 8mm at the other end to accept a peek insert which will have 4 holes drilled in it for the cartridge wires to exit. The 2 retaining screws were next marked,drilled and tapped to M1.6mm! Happy days! Next job is a new bearing carrier in peek.
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Nov 13, 2022 16:46:45 GMT
Yeah, wise move taking that out.
Looking good so far.
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Post by rexton on Nov 13, 2022 17:45:42 GMT
Great thread so far Jamie, really enjoying seeing how this tonearm can be modded.
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Arke
Moderator
Posts: 1,001
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Post by Arke on Nov 13, 2022 18:28:38 GMT
Thanks for taking the time to post Jamie - really interesting.
Can't wait to get a lathe one day.
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Post by karma67 on Nov 13, 2022 18:33:22 GMT
Great thread so far Jamie, really enjoying seeing how this tonearm can be modded. cheers andy,i just hope its all worth it
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Post by karma67 on Nov 13, 2022 18:34:18 GMT
Thanks for taking the time to post Jamie - really interesting. Can't wait to get a lathe one day. go for it! they are great fun and the more you do the more you enjoy it.
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Post by rexton on Nov 13, 2022 18:58:18 GMT
Great thread so far Jamie, really enjoying seeing how this tonearm can be modded. cheers andy,i just hope its all worth it I'm sure it will be. I did a very similar mod on the SME V, I removed the intrinsic 4 pin din plug in the tonearm head and just had a loom of intrinsic wiring from the cartridge tags to the RCA's. I had very similar thinking to yourself with respects to removing as many connections as possible from the signal link. You could directly solder the intrinsic wiring of the tonearm to the cartridge pins and this would forsake cartridge tags, I've seen this done but can't comment on if things are any better sonically.
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Post by karma67 on Jan 15, 2023 13:51:26 GMT
on to the bearing housing,im doing 2,one in aluminium the other in peek. I've been slightly side tracked with TTS-8000's bearings but today i got a chance to start the AT-1010 bearing housing. To copy the original injection moulded plastic one will need careful lathe/milling machine set up but i think i can achieve it. next job is to part it off and do the vertical bearing mounts.
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optical
Moderator
BIG STAR
Be Excellent To Eachother
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Post by optical on Jan 15, 2023 14:00:08 GMT
on to the bearing housing,im doing 2,one in aluminium the other in peek. I've been slightly side tracked with TTS-8000's bearings but today i got a chance to start the AT-1010 bearing housing. To copy the original injection moulded plastic one will need careful lathe/milling machine set up but i think i can achieve it. next job is to part it off and do the vertical bearing mounts. You have some serious skills Jamie, I admire the endeavour too. 👍
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Post by karma67 on Jan 15, 2023 17:26:35 GMT
You have some serious skills Jamie, I admire the endeavour too. 👍 thanks mate.
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Post by rexton on Jan 15, 2023 18:44:46 GMT
Keep it going Jamie, great to see.
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Arke
Moderator
Posts: 1,001
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Post by Arke on Jan 15, 2023 19:00:41 GMT
Looking great Jamie! Very inspiring.
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Post by karma67 on Jan 29, 2023 19:04:31 GMT
slow but sure progress,today i set up my milling machine to do test fit of the vertical bearing seats. the hole was first drilled to 3.5mm and then reamed to 4mm o/d and a depth of 2mm, all went well so im hoping to do these next weekend.
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Post by karma67 on Feb 25, 2023 19:05:51 GMT
vertical tonearm bearings now fitted.
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Post by rexton on Feb 25, 2023 19:22:40 GMT
Blimey!
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Arke
Moderator
Posts: 1,001
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Post by Arke on Feb 25, 2023 21:28:38 GMT
Stunning work, lots of respect!
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Post by karma67 on Feb 26, 2023 7:45:28 GMT
thanks jason,im enjoying the challenge!
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Post by gninnam on Feb 26, 2023 8:27:01 GMT
Stunning work, lots of respect! Have to agree.
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Post by karma67 on Apr 10, 2023 14:06:38 GMT
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Post by stevew on Apr 10, 2023 14:39:24 GMT
Wow… in awe.
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Post by karma67 on Apr 10, 2023 18:01:06 GMT
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Post by sq225917 on Apr 10, 2023 21:31:46 GMT
Lovely looking work there jamie
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Post by karma67 on Apr 11, 2023 4:33:10 GMT
thanks simon,how you doing?
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Post by karma67 on Apr 16, 2023 15:15:37 GMT
getting cocky now,here's one in peek. 1 more to go and that will be in aluminium:)
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Post by rexton on Apr 16, 2023 19:21:37 GMT
very nice, but i think we need some comments about what sounds best !!!!!
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