Vintage DD turntables. Are we living dangerously?

Aren't cliche's just peachy.

I don't dare buy a stethoscope for fear of feeding the neurosis. What if I heard some noise from underneath the platter? I wouldn't be able to sleep until I eradicated it.

Wahwah: "However, no mention so far that Goldmund and Micro-Seiki
used JVC core motors. Anyone care to elaborate on this?"

From the few pictures I saw of the Goldmund and Micro-Seiki motors, they are not coreless motors. The motors are definitely made by JVC but they are not the later coreless version. They are similar to motors in turntables like JVC QL-5 and QL-7, DC core motors.

I have used those JVC turntable models with core motors before and I prefer the later models with coreless motor. That's why I am not surprised someone prefers the Dual coreless motor in the Goldmund after replacing the stock Papst or JVC motor in a repair.

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Hi Hiho, Lew and I nearly started the Dual motor adventure
but were both confused by reading more about 'it' of 'them'(?). The 'lirical report' from some 'spaceman' was nowhere else affirmed. My interest was 'awakened' some time
ago in the context of the Goldmund Studio and the problems with
the Pabst motors. The Dual motor(s?) were the hope for those how owned the 'wrong Sudio'. This story about possible 'right Dual motor' was even more confusing. I give
up my intention to buy the Studio and bought Lurnes Audiomeca J1 instead. At present I own Kuzma Stabi Reference which has many similarities with the J1.
However I am not aware that this 'effort' to replace Pabst motor was succesful. I need some 'ammunition' or arguments to convince Lew that our 'adventure' with the Dual motor
is worthwhile. Our 'division of labour' was meant that he will do the 'technical issue' while I would buy the right Duals on the German ebay. Ie one can see on the German ebay at least 6 of them each day.
Will you care to provide some 'ammunition'?

Regards,

From my understanding of the Goldmund Studio situation is that...

1) If you have nonworking motor, you need to replace it with...
____A) Stock Papst motor, if you can find one.
____B) Stock JVC motor, if you can find one.
____C) EDS-1000 motor salvaged from Dual CS-701 turntable.
____D) EDS-1000-2 motor salvaged from Dual CD-721 turntable.

2) Read quote from below:

"Dual 701/721, EDS 1000/EDS 1000-II- These motors are 5.5" in diameter, while the original Goldmund Papst is 4 3/8", so machining is required....... Further, both motors are fed via their own electronics, and MUST be used with it. It is not bulky, will fit inside. All in all, I would only recommend these if all other options are exhausted"

Personally I would prefer the 701 motor for this purpose because it was designed for a heavier platter (2.9kg) as the 721 uses a lighter platter (1.5 kg) and has less torque. Go for the 701, I say. All the electronics are underneath the motor and the power supply is in its own enclosure so that can be outboard from the table. There is an umbilical cord for the 33/45 speed switch and two pots for speed adjustment. You can eliminate the strobe light if you want.

Again, the person who did the conversion emphasize that he would "only recommend these if all other options are exhausted."

You have been warned. :)

P.S. Or you can simply buy a beater 701 and take out the motor and electronics and make a simple plinth for it and have a listen like this guy.

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