DIY Unipivot - ClearTone

deltavektor · 15th October 2008, 07:05 AM

I quickly whipped this one up yesterday evening... a unipivot arm from plexiglass and various bits and piece I had lying around the workshop.

analog_sa · 15th October 2008, 07:55 AM

Nice. How did you make the curved finger lift? No bias compensation? Was Cantus the inspiration?

deltavektor · 15th October 2008, 08:01 AM

Quote:

Originally posted by analog_sa
Nice. How did you make the curved finger lift? No bias compensation? Was Cantus the inspiration?

The Cantus was in the back of my mind.

I still need to find solutions for a lifter system and bias system.

Curved finger lift were made by heating the tip with a heat gun and shaping it by hand - hot yes!!

DV

revintage · 15th October 2008, 08:01 AM

Great build! Just add a jewel V-cup and this is pro-stuff!

analog_sa · 15th October 2008, 08:14 AM

Forgot the most important (jealous) question: how do you get such clean cuts in the acrylic?

deltavektor · 15th October 2008, 08:28 AM

Quote:

Originally posted by analog_sa
Forgot the most important (jealous) question: how do you get such clean cuts in the acrylic?

The acrylic I use is protected by vinyl stick-on and I dont remove it until I am done. I cut the plastic with a "jig-saw" that is slowed down with a Variac so that it doesnt melt or rip it. After cutting I straigten the edges by sanding it on a piece of sandpaper placed on a flat surface. Easy.

deltavektor · 15th October 2008, 08:29 AM

Quote:

Originally posted by revintage
Great build! Just add a jewel V-cup and this is pro-stuff!

Thank you for your kind words Revintage! A friend of mine uses an engineering company that can work with jewel bearings - maybe I must get in touch with him.

deltavektor · 15th October 2008, 08:31 AM

I must admit that the counter weight also needs work. I am currently using an old brass buss-bar from a Mains DB Box. It gives me 1.8 grm tracking force on the dot. Also works as leveling weight by simply swinging it left or right...

15th October 2008, 07:05 AM	#1
deltavektor diyAudio Member Join Date: Sep 2008	DIY Unipivot - ClearTone I quickly whipped this one up yesterday evening... a unipivot arm from plexiglass and various bits and piece I had lying around the workshop. __________________ "Dont tell me this skies the limit when there is footprints on the moon!"

15th October 2008, 08:01 AM	#4
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	Great build! Just add a jewel V-cup and this is pro-stuff! __________________ Brgds Lars

15th October 2008, 08:31 AM	#8
deltavektor diyAudio Member Join Date: Sep 2008	I must admit that the counter weight also needs work. I am currently using an old brass buss-bar from a Mains DB Box. It gives me 1.8 grm tracking force on the dot. Also works as leveling weight by simply swinging it left or right... __________________ "Dont tell me this skies the limit when there is footprints on the moon!"

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15th October 2008, 08:14 AM	#5
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	Forgot the most important (jealous) question: how do you get such clean cuts in the acrylic?

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