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Souther Linear Tonearm on A TD-124
Souther Linear Tonearm on A TD-124
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Old 30th April 2016, 11:57 PM   #151
kevinkr is offline kevinkr  United States
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Souther Linear Tonearm on A TD-124
I ordered 6" x 0.75" x 0.75" blanks of Cocobolo, African blackwood, Bubinga, and East Indian Rosewood to try for head shell blanks.

Hopefully my father in law can band saw them lengthwise in half and run the pieces through his planer to make a couple of thinner 6" pieces for me to turn into head shells.
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Old 10th May 2016, 05:01 PM   #152
niffy is offline niffy  England
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Hi Kevin,

I've just been reading through your thread of your rebuild and tweaking of a thorens td 124. Even though it is not a deck I am ever likely to own I am finding it fascinating and informative, only 150 pages to go. Well worth a read for anyone interested in refurbishing any type of deck.

I have fitted the pin bearings to my arm so the previously used hybrid ceramic are removed. I had thought that they were similar in performance to the full zirconium oxide ceramic bearings that I reported. I have now tested the hybrids and have say they do measure a lot better. The ZnO3 bearings had a mean coefficient of friction of about 0.01. The hybrids are a lot better at about 0.006. The hybrids did sound a bit better and this could be the reason. The hybrid bearings I was using are from Boca bearings. They use silicon nitride balls and 440 grade stainless for the races and retainer. If you plan on further experimentation with bearings I would highly recommend this manufacturer. They have a very wide range and will probably have the exact size you require. (no affiliation disclaimer)

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Old 11th May 2016, 03:49 AM   #153
kevinkr is offline kevinkr  United States
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Souther Linear Tonearm on A TD-124
Hi Niffy,
Much appreciated comments on the TD-124 thread, it has quieted down quite a bit recently. I have a love/hate with mine, but they are about nicest tables I have ever owned when it comes down to actually playing records. I have a 401 in the wings which should be very interesting.

Always interested in further potential improvement, so those bearings will be of interest if I can find ones that will interchange with the existing ones.

Hottatoo graciously sent me a set of carbide rods, and they look like serious business. I am hoping to build an arm around them at some point.

At the moment I have been experimenting with making arm wands and weights. I've had some success.
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Old 14th May 2016, 05:01 PM   #154
Bare is offline Bare  Canada
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Never actually seen the innards of a Linear gizmo.
Fascinating contraption... Thanks for the views.
In truth tho it does remind me of the Nasa ; 'space pen' alegedly millions in development.
Whereas the Soviets used a pencil
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Old 14th May 2016, 05:41 PM   #155
niffy is offline niffy  England
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Default Urban myth alert

No one has used pencils in space. If the end breaks you have an electrically conductive shard free floating just looking for an electrical short to create. A normal biro works just fine in zero gee.

I am also in proud possession of a pair of tungsten carbide rods courtesy of hottattoo. I've extended my investigation into linear bearing design so I can make the best possible use of them.

Niffy
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Old 15th May 2016, 06:26 PM   #156
kevinkr is offline kevinkr  United States
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Souther Linear Tonearm on A TD-124
As far as I know Nasa paid very little money for its space pens. The company that made them (and still makes them) is here: Fisher Space Pen Co.

Here is a bit more on the space pen myth, and incidentally the U.S. and Russian space programs did in fact use pencils in space.

Fact or Fiction?: NASA Spent Millions to Develop a Pen that Would Write in Space, whereas the Soviet Cosmonauts Used a Pencil - Scientific American

Both the U.S. and Russian space programs used the Fisher space pen when it became available.
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Old 15th May 2016, 06:31 PM   #157
kevinkr is offline kevinkr  United States
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After this let's get back on topic.

Once I figure out how to deal with planing my wood blanks I'll be making more wands and will report back.
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Old 5th December 2017, 08:08 AM   #158
jimchc is offline jimchc
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Default Have mine on original Delphi Oracle

Not sure why you would want to do any modifications to a Souther arm. I tried a few cartridges over the years but I've keep a Koetsu Black in there for two retips (since 1981). It is a heavy cartridge with fairy high tracking force and it is just a magic wet your pants combination. Sure digital has better bass and treble and no pops but that Koetsu midrange and 3d focus can't be described to someone who grew up on digital. I've tried other arms on this table with a Koetsu but none had this synergy. I have it mounted on an original Delphi Oracle. I've tried other lighter cartridges but I think the extra mass helps. The Souther has yellowed with age a little as it is 36 years old. It is a pain to clean and can skip if dirty. I've been lucky and all parts are original. I fear those thin wires will break. I'm working on a diy phono preamp (Pearl 2) since my last preamp purchase sadly did not include a phono input. The Pearl inverts so will need to flip the cartridge wiring. Perhaps I will flip polarity on the Pearl input to leave those wires alone.
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