Designing a motor speed controller/PS - querying motors - Page 2 - diyAudio
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Old 3rd November 2002, 09:50 PM   #11
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Join Date: Oct 2002
Location: PORTUGAL
Frank,

Sorry for the delayed response but I was unable to connect to diyaudio for 3 days.

You stand correct on the fact that my TT has two motors one for each speed.
The solution is pretty lame and I really dont think anyone would keep switching motors back and forth during a normal listening session. In fact, Pro-Ject has what they call a "speed-box" which is, well, a quart-locked frequency power supply so you can change speeds with the flick of a button.

Still, I have my mind set on building my own unit. I want to design a flexible top-quality device that will be on par with units like VPI's SDS or Walker Precision Driver (and at a fraction of the price). I think that there is room for improvement on this type of devices and I have one or two ideas that I havent seen yet on any of the available designs. I am convinced that such a device would benefit many other people that have AC motor driven TTs.

Your suggestion on bypassing the suspension makes a lot of sense to me and I'll be sure to try it. Thanks. Your comments are wellcome, I know the Project is not the best in the world and usually you get what you pay for.

Best Regards,
Guilherme.
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Old 3rd November 2002, 10:09 PM   #12
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Join Date: Aug 2002
Location: Belgium
Default 3 DAYS WITHOUT FORUM IMAGINE THAT.

Guilherme,

Seems you've been worse of then the rest of us.

TT:sure give it a shot.
I'm very interested.

Regarding running a lightweigt TT at 78 RPM,I hold my breath.
Me,I'ld rather use a TT especially designed for that +special 78RPM cartridge and don't forget EQ wasn't all that standardized in those days either.
Tricky busines.

Good luck building and you know where to find us,don't you.

Cheers,
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