Auteur Topic: LOCI toonarm  (gelezen 919 keer)

Markus

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LOCI toonarm
« Gepost op: 21 december 2017, 16:44:47 »
For fun;

Een kort artikel, door de maker van de LOCI tonearm die een wel heel erg beperkte oplage gekend heeft.

The LOCI Tonearm


The LOCI tonearm was the product realization of a hifi vision I had in 1975. As a freshman in college, I had built my own tonearm out of Lego blocks (really!), and I saw the Vestigal tonearm at Music and Sound Limited, Mel Schilling's ultra-high-end and pro audio store in Willow Grove, Pennsylvania. Along with the Dynavector DV-505, this was the inspiration for an articulated tonearm, separate vertical motion, with a parallelogram to keep cartridge motion vertical. This was the subject of my United States Patent Number 4182517, my original patent for the Articulated Parallelogram Phonograph Tonearm.



A side effect of the parallelogram is a constant cartridge angle in the groove. The vertical tracking angle (VTA) (or stylus rake angle (SRA)) can be adjusted by changing the pitch of the parallelogram and the angle does not depend on record thickness. Many listening tests produced a VTA list in PDF or text (Zie hier deze lijst) These were all done by seeing which angle sounds best on each record label. You tune one label in by ear and the rest should line up. Even if your own preferred VTA is not quite the same as mine, say you like the sound a bit more muted or a bit brighter, then the relative positions should still be correct.



My original tonearm was made from Erector Set and paper clips with a nice gyroscope as the main bearing. With help from Mike Barry (Stanford Product Design), my concept became a real design, the LOCI tonearm. I sold about sixty of these tonearms in 1980 and 1981 and I see one of them surface every once in a while. It was not a financial success for a lot of reasons, some of which have to do with my lack of business acumen, some of which have to do with changes in the audio market. Linn came out with their own Ittok tonearm, so all their dealers were pressured to sell the Ittok, and the compact disk came out with all its associated hype.

I took some pictures of the LOCI tonearm. They are big image files, so be patient if you decide to download them.

Well, I finally made the big time. One of my LOCI tonearms turned up on eBay. It ultimately sold for U.S. $255.

Here are two terrific Corey Greenberg reviews. Neither has anything to do with the LOCI tonearm, but they are wonderful reading for any audio weenie.

I also do some live recording from time to time, so here is a picture of me and my recording setup.

Alas, I have no LOCI tonearms for sale. The few I have are buried in a box somewhere in my basement and I don't even know where they are.





De in het artikel genoemde Transcriptor Vestigial en Dynavector DV 505 toonarm, in die volgorde.





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« Laatst bewerkt op: 21 december 2017, 17:22:31 door Markus »
Most of the time not dead serious.

Vintage lover

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Re: LOCI toonarm
« Reactie #1 Gepost op: 21 december 2017, 16:55:35 »
Appart ding.
Lenco 88 Micro-Seiki cf1. - Lenco l78 12inch DV. Rodec sm200.
Luxman l507s.  Denon dcd 2700. Jvc dd5 Cassettedeck. Akai 201d bandrecorder.
Elipson 1404. Cabasse Prao. Yamaha M2-C4. Jobo 2800 All Balance. Lenco b51 Burn & Jones Super.


I love vintage.

Hififreak

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Re: LOCI toonarm
« Reactie #2 Gepost op: 21 december 2017, 22:59:55 »
Heel bijzonder en nog nooit eerder gezien.


Dromen kun je beter verwezenlijken bij leven dan ze uit laten spreken door een notaris.

Vintage lover

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Re: LOCI toonarm
« Reactie #3 Gepost op: 22 december 2017, 09:41:17 »
Ik zou toch voor de Dynavector gaan.
Lenco 88 Micro-Seiki cf1. - Lenco l78 12inch DV. Rodec sm200.
Luxman l507s.  Denon dcd 2700. Jvc dd5 Cassettedeck. Akai 201d bandrecorder.
Elipson 1404. Cabasse Prao. Yamaha M2-C4. Jobo 2800 All Balance. Lenco b51 Burn & Jones Super.


I love vintage.