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Old 1st July 2013, 09:50 PM   #21
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Colin's arm and the Cantus each have 4 contact points so they will "skate" up and down instead of pivoting on the tube or inside the tube, hence avoiding the "teeter totter" effect of conventional tonearm. Such scheme said to be more sonically dynamic and from Colin's report, he has succeeded.

Thanks for bringing your design to the forum. Mechanical linear arm is something I always want to try but never have time to do it but glad someone is bringing it to fruition. Keep those pictures and ideas coming!
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Old 1st July 2013, 10:24 PM   #22
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The Taiwan tonearms are from member Riverland. Anybody still have a Rabco?
My Rabco is gone, but I was always fascinated by linear tonearms. Is the Opus Cantus tonearm available commercially? Are the majority of DIY linear tonearms air bearing? If you made a DIY linear tonearm please post pictures here and talk about your tonearm.
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Old 2nd July 2013, 01:21 AM   #23
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Directdriver has got it bang on, the inverse same as the Cantus . I was trying to post a video of it tracking a very nice outer warped record, it does so like a champ and is almost comical to watch!. I've put it through some good torture tests and it tracks well. I've noticed too that with a linear arm off center pressings really don't matter as they would a pivoted arm, it's only bad warps that show any anomalies in pitch, IMHO there are more off center pressing out there than badly warped vinyl these days


Colin
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Old 2nd July 2013, 06:17 AM   #24
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Default opus3 table/arm

Quote:
Originally Posted by audiostar View Post
The Taiwan tonearms are from member Riverland. Anybody still have a Rabco?
My Rabco is gone, but I was always fascinated by linear tonearms. Is the Opus Cantus tonearm available commercially? Are the majority of DIY linear tonearms air bearing? If you made a DIY linear tonearm please post pictures here and talk about your tonearm.
Yes the table and arm that Bo Hansson designed and built are back in production and are available. Some refinements have been made. Best regards Moray James.

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Old 2nd July 2013, 06:44 PM   #25
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Thanks to Moray James for the new Opus3 link including a new gallery page. The below picture showing the bearing inside the glass tube demonstration its concept well, as mentioned by Moray. Don't forget to check out the YouTube video.

Click the image to open in full size.
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Old 2nd July 2013, 07:28 PM   #26
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Directdriver,


I'll match that photo and offer a similar shot .

Colin

One thing that also seems to stand out with this arm is deep tight and beautiful tuneful bass, I have a modified rb250 with low slung weight and it can't even come close to the musicality of the bass now. One thing that always drive me nuts about that arm was its bland highs and upper mids,almost grey sounding.
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File Type: jpg image.jpg (482.4 KB, 1137 views)

Last edited by vynuhl.addict; 2nd July 2013 at 07:48 PM. Reason: Adding info
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Old 2nd July 2013, 08:24 PM   #27
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Default Been around for a long time

here is a photo of an idea which has been around for a long time and has be commercial a number of times though I cannot recall names other than some current Clear Audio versions. Not sure who made this one (probably clear Audio) but the photo shows the concept and it lends itself to all manner of variants. The other photo with the underside shot was a production arm. I love the simplicity of the idea. Best regards Moray James.
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File Type: jpg Linear Tracking Tonearm on Wire.jpg (34.5 KB, 1112 views)
File Type: jpg Parallel tracking tonearm on a thread.jpg (245.5 KB, 1089 views)
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Old 2nd July 2013, 08:29 PM   #28
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I am always curious of what is the benefit of using two rods like a pair of chopsticks in the Cantus. Wouldn't using one makes it a lot easier to install cartridge with a scalloped headshell? Hmm....
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Old 2nd July 2013, 08:36 PM   #29
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Continuo The Opus3 Continuo turntable with Cantus tonearm.
Who are these guys that took over from Bo Hansson? Anybody has this turntable and tonearm?
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Old 2nd July 2013, 08:59 PM   #30
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Quote:
Originally Posted by moray james View Post
here is a photo of an idea which has been around for a long time and has be commercial a number of times though I cannot recall names other than some current Clear Audio versions. Not sure who made this one (probably clear Audio) but the photo shows the concept and it lends itself to all manner of variants. The other photo with the underside shot was a production arm. I love the simplicity of the idea. Best regards Moray James.
The first photo is of a Aura turntable, a Czech hifi maker.

I have this one.

Last edited by Arch Stanton; 2nd July 2013 at 09:04 PM.
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