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I want to donate a DIY tonearm to charity

Posted by M.Stojek on February 22, 2011 at 17:20:36:

Since I had parts leftover after experimenting with magnetically suspended tonearms I build one more string suspended unipivot (no magnets in the bearing) with the intension of donating it to charity. To be more specific I want all proceeds to go to Greenpeace!!!
The bearing is my own idea. To my best knowledge this design doesn’t infringe on any patent so tonearm may be resold. I enjoy using two tonearms like it and I have absolutely no intention to make any more!
If it was a brand name tonearm I would go straight to AudiogoN, but this is a toy for special boys, that’s why I am showing it on forums first.

The tonearm is free standing; it only needs legroom on a turntable stand. It can be adjusted to work with turntable 5 to 7” high. Higher or lower TT would require rising tonearm or TT. Brass coupling discs for spikes are included (if someone wants to protect surface of the stand).
The wand is suspended in the middle of tensioned string in the way that string has solid contact with integral part of the wand, which allows effective drain of sound waves out of the wand, but suspension point is very small and acts as unipivot bearing. The Vectran fiber string is tensioned by a compressed spring.
Effective length is 305mm; overhang is 13.4mm, offset is 17.8 degrees. Effective mass is about 14g with aluminum plate or 18.5g with brass headshell plate. Extra counterweight is included. The tonearm does not have VTA on the fly adjustability. There are two separate antiskate mechanisms (twisted string and magnets) supplying different antiskate force at different part of LP. Proper setup is essential and not for beginners.
The wire and clips are Cardas, RCA plugs are Eichmann. The wire is not shielded - it may not work close to some motors etc. The tonearm lift is from VPI.
There are some details not visible on pictures: aluminum mounting ring is filled with lead; counter weigh shaft is filled with tungsten powder; counterweights are decupled from shaft with delrin inserts; wooden wand is pressure treated with oils, the bottom part of stand is made from acrylic, the top is rosewood; aluminum and brass parts are intentionally left uncoated and with time will loose shine…

I have to figure out how to organize the donation.
Mean time, if somebody wants to listen to this tonearm in my system I live in central Florida.

Any questions or suggestions?
Greetings,
Marek Stojek