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Administrator
 Post by Owen Y on Aug 2, 2020 13:44:32 GMT 12
This turned up last night, no need for 3 guesses....
DarkLantern blog - darklanternforowen.wordpress.com
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Post by michaelw on Aug 2, 2020 16:06:02 GMT 12
thought you were trying to reduce your number of turntables ?
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Post by Citroen on Aug 2, 2020 16:11:44 GMT 12
So what plinth will you be putting this one in?
Cliff
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Post by colinf on Aug 2, 2020 18:02:14 GMT 12
Owen goes rim drive?!
AMR-iFi R&D
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Post by Owen Y on Aug 2, 2020 18:06:06 GMT 12
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Post by Citroen on Aug 2, 2020 18:11:57 GMT 12
Spill the beans!
Cliff
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Administrator
A wee job to do on a 301 Aug 3, 2020 17:08:58 GMT 12
- Edited Aug 4, 2020 22:10:52 GMT 12 by Owen Y
Citroen and deano1974 like this Post by Owen Y on Aug 3, 2020 17:08:58 GMT 12
Chaps - sadly, this is not mine.
(So the owner & full details will remain private.)  I have been tasked with cutting a 'pocket' (flat-bottomed hole) for the installation of one of this tonearm....  (Armtube & horiz. bearing assemnly removed.) DarkLantern blog - darklanternforowen.wordpress.com
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Post by michaelw on Aug 3, 2020 17:17:21 GMT 12
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Post by Citroen on Aug 3, 2020 17:29:13 GMT 12
Kuzma and 301. Should sound great. Plinth wood looks interesting
Cliff
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Administrator
A wee job to do on a 301 Aug 3, 2020 19:44:22 GMT 12
- Edited Aug 9, 2020 20:49:09 GMT 12 by Owen Y
deano1974 likes this Post by Owen Y on Aug 3, 2020 19:44:22 GMT 12
Yes, MF was quite smitten by this tonearm. Not sure, but I think he still liked his Continuum Cobra....until the Swedish SAT came along 4 years later.
The 4Point DOES have a few interesting design features, eg. - It's a 280mm (11") arm that mounts at the same mounting distance as a 9" arm - ie. only 212mm from record spindle. - The massive VTA 'tower' (0.8mm per rotation) mounts into this hole & the actual tonearm sits alongside the tower, outboard on a separate bearing pivot. (Internet image below, of a 4Point moumted on an SME TT.) 
DarkLantern blog - darklanternforowen.wordpress.com
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Administrator
Post by Owen Y on Aug 7, 2020 16:03:45 GMT 12
Using the Kuzma template.
And the trusty Dennesen tool...  
DarkLantern blog - darklanternforowen.wordpress.com
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Post by Owen Y on Aug 7, 2020 16:07:00 GMT 12
We decided to invest in one of these....
 (Tool quality is average, good enough for our use, without too much expense ($35). DarkLantern blog - darklanternforowen.wordpress.com
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Post by audionut on Aug 7, 2020 16:24:44 GMT 12
I have a client using a Kuzma 4Point with the 401. Sounds fantastic :-)
Audionut - Artisan Audio At Its Best
www.audionut.net
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Administrator
A wee job to do on a 301 Aug 9, 2020 20:35:21 GMT 12
- Edited Aug 10, 2020 10:17:40 GMT 12 by Owen Y
Post by Owen Y on Aug 9, 2020 20:35:21 GMT 12
Plinth with 301 removed & arm hole cut....
 Clamped in the drillpress, mid-cut with the 40mm Forstner bit....  Successful, nice clean hole, 56mm deep - which is deep enough, should the 'armboard' piece is discarded & the arm mounted directly down onto the plinth. (The fixing screw marks were existing & more accurately located new ones will need to be drilled for the armbase.) 
DarkLantern blog - darklanternforowen.wordpress.com
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Administrator
A wee job to do on a 301 Aug 9, 2020 20:43:53 GMT 12
- Edited Aug 10, 2020 10:16:58 GMT 12 by Owen Y
Post by Owen Y on Aug 9, 2020 20:43:53 GMT 12
The Kuzma 4Point armbase - like the rest of the tonearm, solid & well-finished....
DarkLantern blog - darklanternforowen.wordpress.com
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Administrator
A wee job to do on a 301 Aug 13, 2020 11:30:47 GMT 12
- Edited Aug 13, 2020 11:32:41 GMT 12 by Owen Y
Post by Owen Y on Aug 13, 2020 11:30:47 GMT 12
Some final pics to wrap up this exercise:
Kuzma's nice plastic protractor for locating the main arm pivot - just hook it around the platter spindle & rotate the VTA pillar until the arm pivot fits the template. One armbase allen screw to lock it in place. Easy-peasy. I wish that other tonearms were this easy.  DarkLantern blog - darklanternforowen.wordpress.com
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Post by Owen Y on Aug 13, 2020 12:40:28 GMT 12
Main arm-tube with counterweights & phono cable, is dropped onto the armbase pivot.
All finished, bar VTA, VTF, Anti-skate & arm damping (the latter 2 optional). 
DarkLantern blog - darklanternforowen.wordpress.com
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Administrator
A wee job to do on a 301 Aug 13, 2020 13:05:57 GMT 12
- Edited Aug 13, 2020 13:07:48 GMT 12 by Owen Y
Post by Owen Y on Aug 13, 2020 13:05:57 GMT 12
Interesting design features of this tonearm (some unique):
- The 4Point bearings comprise 4 x 'unipivot' points: Horiz bearing with a unipivot, together with a side 'point' (which is held in place when the arm & c/weights are in place).  The vertical bearing comprises 2 x unipivot points. All bearing points are now sapphire jewelled, in the latest 4Points.  - The 4Point tonearm has not only a horizontal fluid damping trough, but also a vertical fluid damping 'well'.  (Kuzma image) - The 4Point has twin (parallel) output phono cables - you have a choice of one terminating at a RCA socket box (at which you can connect your own phono IC), or another which runs 1.4m continuous to ypur phono-stage.  (Kuzma inage) - Azimuth is adjustable via a 'worm-drive'. DarkLantern blog - darklanternforowen.wordpress.com
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