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Vintage DD turntables. Are we living dangerously?

I have just acquired a 32 year old JVC/Victor TT-101 DD turntable after having its lesser brother, the TT-81 for the last year.
TT-101
This is one of the great DD designs made at a time when the giant Japanese electronics companies like Technics, Denon, JVC/Victor and Pioneer could pour millions of dollars into 'flagship' models to 'enhance' their lower range models which often sold in the millions.
Because of their complexity however.......if they malfunction.....parts are 'unobtanium'....and they often cannot be repaired.
128x128halcro
best-groove's avatar
best-groove
843 posts
 
@lewm all right .......knowing if it will serve I will know it in several months I will keep all you up to date on development, I hope it is not necessary but thanks for your generous offer. :)

@jpjones .....many thanks for your suggestion :)
rwwear
2,873 posts
 
Is the IC used in any other JVC or other brand turntable? Because there's usually lower priced models available cheap.
best-groove's avatar
best-groove
843 posts
 
maybe everything can be...... but I do not know.

It would be sufficient to compare the TT 81 and TT 71 service manuals for example, but I'm not sure these models adopt the bi-directional servo.

lewm
13,152 posts
 
I forget the part number for the critical IC, but all I did was Google it, and I found many sources for it, in Asia.  Most are on Alibaba (I hope that's the correct name of that website).  I just chose a vendor who seemed to understand at least a little English.  The cost is cheap, once you find a vendor, because who else wants one, besides the few dozen people in the world who may be fixing TT101s?  Albeit, this was 3-4 years ago when I made my purchase.  One thing to keep in mind is that the chips are around the same age as the TT101, so I suppose it's possible that they can go bad just from sitting on the shelf under god knows what storage conditions, for 30 years.  One of mine was used to repair a TT101, and it worked, is all I know.
rwwear
2,873 posts
 
The QL-F6 has the same bi-directional servo as the 101. I have one of these and it’s very good. They are cheap on eBay.

" Although far less remembered than the QL-10 or QL-7, the QL-F6 has about the same motor structure as the former, the same specs as the latter - and, in spots, even surpasses both !
Bi-directional servo as in the QL-10 (and the TT-101 and TT-801), Coreless DC servomotor (as in the QL-10), continuously variable Q oil-damping for both horizontal and vertical planes, diecast aluminium cabinet, non-resonant "High-Density Pararesonance"
Bi-directional servo works with a push-pull amplifier in the drive circuit : two currents are generated in each motor drive coil, one pushing and one pulling the rotor.
The result is less overshoot in speed correction, 50% increase in efficiency, 40% increase in torque and the remedy to coreless' motors lower efficiency and lower torque capability... See the JVC TT-101 page for more details."

http://www.thevintageknob.org/jvc-QL-F6.html
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