Thorens TD150 History

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vitw1844
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Thorens TD150 History

Post by vitw1844 » 11 Apr 2019 18:26

I thought that this information may be useful to those who may never have known or read of this part of the Thorens TD150 history before (Google translated from German, sorry if there are any errors):

"TD 150 (1965) and TD 150 Mk. II (from 1969) - the first Thorens with oscillating chassis.

With the TD 150 began 1965 a new era in turntables. In this small, inconspicuous drive for the first time the legendary, suspended on three conical springs subchassis (of Thorens oscillating chassis called) realized, were decoupled with the turntable and tonearm of engine vibrations and external influences (impact sound) (Rumpel noise-to-noise ratio: -65 dB). This design goes back to Mitch Cotter of Acoustic Research (USA), who implemented the idea of ​​his colleague Edgar Villchur.

In place of a complicated and complex friction wheel drive (TD 124) was a simple single-stage belt drive with an AC synchronous motor. This was operated with 220 V voltage and regulated by the mains frequency of 50 Hz.
Fluctuation fluctuations: 0.09%

The two speeds were mechanically shifted by moving the drive belt over the shift fork on the stepped pulley of the engine.

Even the construction of the two-piece turntable, in which the drive belt runs on the inner plate, has been taken over until today.

The robust and simple technology of the TD 150 set standards and was taken over, among others, by the British company Linn for their famous drive Sondek LP 12 almost unchanged. Ariston's first subchassis drives were also based on the TD 150.

As with the TD 124, the high tonal potential of the TD 150 also allowed the installation of high-quality tonearms (eg from SME or Ortofon). Also as a basis for special constructions (eg for the Rabco SL 8 Tangential tonarm) the chassis of the 150 was used.

At launch, the TD 150 was equipped with the TP 13, which had to do without anti-skating device. This tonearm was replaced from 1969 with the version Mk II by the TP 13a, in which a hanging on the thread balance weight for skating compensation provided. Since both the counterweight and the weight for applying the bearing force were spherical, the TP 13a was also known as "ball tone arm" and became a kind of "hallmark" for the 150s.

Since the drive and chassis construction had proven their worth, they were taken over unchanged by the first generation of devices.

Weight: 6.7 kg, of which 3.2 kg are accounted for on the turntable (saucer and saucer).

Prices 1968: TD 150 without tonearm 246 DM,
with tonearm TP-13 298 DM,
with TP-13 and MM system Stanton 500 AA 387 DM,
with Stanton 500 E 416 DM,
Plexiglas hood 33 DM.

Original source: http://thorens-info.de/html/thorens_td_150.html

It has always been of interest to me that subsequent designs have added so many extras to the three point suspended subchassis design, but the fundamental elements of the TD150 have still been kept by many different manufacturers over the years, a testament to the fine job that was carried out when it was first produced over 50 years ago.

pivot
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Re: Thorens TD150 History

Post by pivot » 12 Apr 2019 14:06

Nice to see credit is given to Acoustic Research as the originators of the suspended sub-chassis design.

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Re: Thorens TD150 History

Post by raphaelmabo » 12 Apr 2019 14:32

Thorens continues this with three point subchassi in the new and just announced TD1600 and 1601 turntables, but the springs are up-side down compared to the TD150. Also the TD350, TD550 and the TD90x-serie are variations on the same theme. And the TD309 is also a 3-point subchassi but with suspension design inspired by loudspeaker elements.

It could also be added that the Ariston RD-11 is the results of the combining talents of Mr Hamish Robertson and Ivor Tiefenbrun, with financial support by Ivors father so they could start the production. Later, Hamish Robertson left and Ivor started his own company Linn and started selling the Linn Sondek LP12, which was in essential an Ariston RD-11. The inspiration comes from the TD150 that Ivor felt could be made better.

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Re: Thorens TD150 History

Post by terzinator » 26 Apr 2019 16:50

very cool. Thanks for posting this.

vitw1844
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Re: Thorens TD150 History

Post by vitw1844 » 03 May 2019 17:28

"the high tonal potential of the TD 150 also allowed the installation of high-quality tonearms"

I would totally agree with this statement from the German website. This year makes ten years now since I have used the TD150 at home, the longest duration that I have lived with any one turntable domestically, whether it be more expensive or cheaper. To my ears it is engineered to simply get out of the way and allow the other components in the vinyl chain to do their job - to reproduce music. They key to this long term satisfaction in my experience has been to follow this guide for setting up the motor unit:

1) To keep the unit perfectly level
2) Placed on a wall shelf
3) Main bearing well filled
4) Use an original Thorens belt
5) To make sure that the suspension is set up as the manufacturer intended:
6) Platter set at the correct height (bottom of the outer platter to be around 6mm from the top plate)
7) Set to move in a vertical pistonic motion when pushed down with no sideways movement
8) To adjust the springs under load for the subchassis to have a 15 second total oscillation time from depress to total stability (this seems to be at about a swing rate of 5Hz with my current Linn LVX tonearm*)
9) Tonearm cable loose enough not to hinder suspension movement

Linn say much (and make much) about meticulous turntable setup. The same can be said for this model. Fine tuning it certainly makes the difference. As I only use the deck about 1 day a week, there has been no need to make any adjustments for 5 years now, other than to periodically clean the rubber deposits from the pulley and inner platter.

*see here for more discussion about subchassis spring/swing rate:

https://pinkfishmedia.net/forum/threads ... es.181646/

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Re: Thorens TD150 History

Post by Duntov » 06 Nov 2019 14:09

pivot wrote:
12 Apr 2019 14:06
Nice to see credit is given to Acoustic Research as the originators of the suspended sub-chassis design.
But they weren't.

1955 H.H. Scott
1958 Stromberg Carlson Perfectempo
1959 Orpheus

H.H. Scott didn't patent but Stromberg Carlson did: https://patents.google.com/patent/US302 ... +C+Siebert

tlscapital
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Re: Thorens TD150 History

Post by tlscapital » 08 Nov 2019 13:41

Duntov wrote:
06 Nov 2019 14:09
pivot wrote:
12 Apr 2019 14:06
Nice to see credit is given to Acoustic Research as the originators of the suspended sub-chassis design.
But they weren't.

1955 H.H. Scott
1958 Stromberg Carlson Perfectempo
1959 Orpheus

H.H. Scott didn't patent but Stromberg Carlson did: https://patents.google.com/patent/US302 ... +C+Siebert
=D>

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