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Thread: Linear Tracking Turntables

  1. #31
    Senior Member Baron Scarpia's Avatar
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    Quote Originally Posted by Simon Moon View Post
    As you can see, this Thales arm is pivotal, but the 2 arm shafts slightly rotate the head shell as the arm is traversing across the LP, always staying in perfect tangential alignment. I have no question in my mind, that this tonearm implementation is the best design. I have not been able to see any downside (except the price, as they do tend to be expensive).

    Well, I can conceive of a downside, which is that you have more bearings and pivots and ultimately the force the record exerts on the stylus does the work of moving the tone arm and rotating those bearings and pivots, which at some level have stick/slip instability. It seems to me the simplest solution is just to make the tone arm very long so that the rotation of the tonearm becomes very small and the tracking becomes close to linear.
    There are two kinds of music, good music and the other kind. - Duke Ellington.

  2. #32
    Senior Member NoCoPilot's Avatar
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    Oddly, they've tried very long arms.


    They've tried short arms.

    They've tried parallelogram arms.

    They've tried linear tracking arms.


    It's hard to think of ANYTHING that hasn't been tried in the last 90 years of turntable design.
    https://www.audioholics.com/audio-te...ntable-history
    Last edited by NoCoPilot; Apr-21-2021 at 04:34.

  3. #33
    Senior Member Simon Moon's Avatar
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    Quote Originally Posted by Baron Scarpia View Post
    Well, I can conceive of a downside, which is that you have more bearings and pivots and ultimately the force the record exerts on the stylus does the work of moving the tone arm and rotating those bearings and pivots, which at some level have stick/slip instability. It seems to me the simplest solution is just to make the tone arm very long so that the rotation of the tonearm becomes very small and the tracking becomes close to linear.

    I guess that is one of the reasons why these types of linear tracking arms are so expensive. Cost of making extremely good bearings, with tight tolerances.

    I do believe that long arms are the best compromise between cost and very low tracking error and therefore, very low IGD. Their length also pretty much negates the need for anti-skate adjustments.

    The downside to long arms, some would say, is increased resonances, and increased effective mass.

    I use a 12" arm, and I couldn't be happier. IGD is a thing of the past. Even on some of those 25 minute Genesis sides from the 70's.

    I am using a 12" tonearm designed and built by a retired Australian engineer, that I bought for the ridiculously cost of $325 US.

    temaadaudio.biz

    Tonearm.png
    Last edited by Simon Moon; Apr-22-2021 at 23:40.
    And if there were a god, I think it very unlikely that he would have such an uneasy vanity as to be offended by those who doubt His existence - Russell

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  5. #34
    Senior Member Baron Scarpia's Avatar
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    Quote Originally Posted by NoCoPilot View Post
    Oddly, they've tried very long arms.
    Yes, back in the day my dad had a Thorens TD-124 with a longer than typical Rek-O-Kut (maybe an S160) tonearm that was mounted on a sort of diving board hanging off the turntable base.
    There are two kinds of music, good music and the other kind. - Duke Ellington.

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    I recently acquired a Sears Proformance Model 564 Linear Tracking Turntable, from a local record store. It was restored by the best Hi-Fi shop in town, 2 doors down from the record store. It came with a piece of junk AT81CP cartridge, but I fortuitously still own several P-Mount cartridges. Like 2 AT311EPs, a 6006, and a Grado Green in P-Mount version. It sounds incredible for such an oddball turntable.

  7. #36
    Senior Member Dorsetmike's Avatar
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    I have the Technics SL-DL1, picked it up second hand for £15, fitted a new cartridge £30, just had a Google and found prices way higher. Quite satisfied with the performance, the rest of my System is also Technics purchased second hand, SA EX100 receiver and SB-CH10 speakers, also have PCs connected to CD & VCR inputs to the receiver.
    I'm like my avatar .................. a local ruin

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    Senior Member CnC Bartok's Avatar
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    I had one of these linear tracking turntables, the Technics one that was the same size as a record sleeve. I really liked it, good sound, and (sorry!) quite pretty to watch it playing! I always thought it looked like a sandwich toaster......But it did have issues. Some longer LP sides were cut off with a couple of minutes to go, which was vey annoying, it seemed to need a minimum half an inch run-off? And moving the arm to a track was both clunky and very hard to aim correctly!

    I replaced it with a Linn, which I still have. No contest......
    Last edited by CnC Bartok; May-03-2021 at 11:41.

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    Quote Originally Posted by CnC Bartok View Post
    I had one of these linear tracking turntables, the Technics one that was the same size as a record sleeve. I really liked it, good sound, and (sorry!) quite pretty to watch it playing! I always thought it looked like a sandwich toaster......But it did have issues. Some longer LP sides were cut off with a couple of minutes to go, which was vey annoying, it seemed to need a minimum half an inch run-off? And moving the arm to a track was both clunky and very hard to aim correctly!

    I replaced it with a Linn, which I still have. No contest......
    I've given up trying to find tracks on mine. I just play the whole side and wait patiently for the favourites.

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  12. #39
    Senior Member Dorsetmike's Avatar
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    Quote Originally Posted by Mark Dee View Post
    I've given up trying to find tracks on mine. I just play the whole side and wait patiently for the favourites.
    I play the whole side into a PC and save to a hard disc (deck to amplifier, amplifier "tape out" or headphone socket to PC audio in) I can then transfer favourite tracks to a separate folder. I can also use a bit of software called "Mixtape" which will generate playlists, tell it the required duration in minutes (I usually select 360) the folder(s) to use, then specify Genre, artist if wanted. If making a number of playlists it can remember which tracks have alredy been selected. If after playing them through you find a track you don't like you can edit the list in notepad.
    Lists are played through Windows media player. (PC audio or headphone socket to either CD or VCR input on amplifier)
    Last edited by Dorsetmike; May-03-2021 at 13:38.
    I'm like my avatar .................. a local ruin

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    Quote Originally Posted by Dorsetmike View Post
    I play the whole side into a PC and save to a hard disc (deck to amplifier, amplifier "tape out" or headphone socket to PC audio in) I can then transfer favourite tracks to a separate folder. I can also use a bit of software called "Mixtape" which will generate playlists, tell it the required duration in minutes (I usually select 360) the folder(s) to use, then specify Genre, artist if wanted. If making a number of playlists it can remember which tracks have alredy been selected. If after playing them through you find a track you don't like you can edit the list in notepad.
    Lists are played through Windows media player. (PC audio or headphone socket to either CD or VCR input on amplifier)
    I have a budget back-up turntable that I record vinyl onto mp3 through Audacity. It does a good enough job - it has a magnetic cartridge and tracks at 3.5g so that's fine me. My linear tracker has a pre-amp so in theory I could connect it straight into the line input of my ancient PC, but I prefer keep my main turntable downstairs rigged up to the rest of my system - hence using my back-up turntable.
    Last edited by Mark Dee; May-03-2021 at 18:35.

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    Quote Originally Posted by CnC Bartok View Post
    I had one of these linear tracking turntables, the Technics one that was the same size as a record sleeve. I really liked it, good sound, and (sorry!) quite pretty to watch it playing! I always thought it looked like a sandwich toaster......But it did have issues. Some longer LP sides were cut off with a couple of minutes to go, which was vey annoying, it seemed to need a minimum half an inch run-off? And moving the arm to a track was both clunky and very hard to aim correctly!

    I replaced it with a Linn, which I still have. No contest......
    The Sears table I mentioned above has very few issues. It's able to play Genesis Selling England by the Pound without a problem. That record is cut very close to the label, with a very short lead out spiral. The only issue I have is a tendency to repeat when it encounters even minor surface damage. But I find that's common with any P-Mount cartridge table. Those records I simply play on one of my 1/2" mount tables.

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