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Turns out there's a speed adjuster on the motor.
Turns out there's a speed adjuster on the motor.
Vodka
Tag the thread too, that might help.
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Oh come on don't be so hard on your self - could have happened to anyone.
"Reality is what it is, not what you want it to be." Frank Zappa. ----------- "The invisible and the non-existent look very much alike." Huang Po.----------- "A drowsy line of wasted time bathes my open mind", - Ride.
Rave (10-12-2008)
????
Click tags at the bottom and then put small tags to label and describe the thread.
You know it will be filled with Rave n00b tags by others by the end of the week though
Rave (10-12-2008)
LOL!Click tags at the bottom and then put small tags to label and describe the thread.
You know it will be filled with Rave n00b tags by others by the end of the week though
I'm pretty sure that the Frequency of the mains is regulated to about 0.01%, so definately wouldn't vary enough for a semitone. More likely the motor is getting old or the drive belt stretched a bit?
I know that my Dad's old turntable had adjustable speed, which was calibrated with a little orange AC lamp working like a teeny strobe shining against a load of spots around the edge of the turntable. You adjusted the speed until the spots stayed still under the strobe effect of the light (which, incidentally, was from the AC mains).
Is there nothing like that on modern turn tables?
They told me I was gullible ... and I believed them.
There is on DJ decks. They usually have several rows or different sized dots so you can adject for various speeds.
"audiophile" turn tables wouldn't dare put something like that on their units, someone is bound to assert it has a negative impact on the sound quality. Anyway, selling it as a "tuning kit" means they can get another few hundred off you for very little indeed.
I'm pretty sure the frequency of the mains can vary as much as 1% or even a smidge more at times of very high load- the quintessential 'post-Eastenders-Kettle' load, for example.
As for the belt stretching- it'd have to be slipping for it to make any difference, And I reckon that's cause audible frequency instability. A bit of finger drag on the label should really cause it problems which it didn't.
Basically- no, though I daresay the old Technics SL-1200 still has it (my dad's old Rotel had it too, join the clubI know that my Dad's old turntable had adjustable speed, which was calibrated with a little orange AC lamp working like a teeny strobe shining against a load of spots around the edge of the turntable. You adjusted the speed until the spots stayed still under the strobe effect of the light (which, incidentally, was from the AC mains).
Is there nothing like that on modern turn tables?
Now everyone has a CD player it's pretty easy to tune by ear assuming you have at least one CD/Vinyl duplicate copy.
But, basically, you want a power supply with it's own quartz 50hz signal generator- which I have, in my LP12. Now if I could only get a new stylus for it.
That changes the frequency?
I'd of thought no.
throw new ArgumentException (String, String, Exception)
You can see the realtime grid frequency here:
http://www.dynamicdemand.co.uk/grid.htm
My sl1210's have dc motors. Thinking about it, it would be easier to regulate a dc voltage to a motor to maintain a constant speed. Plus speed control would be easier.
Beer is life, life is good!
Rave (13-12-2008)
Cool! Looks like I was wrong about the extent to which the frequency can in practice vary though.
If I remember correctly, a DC motor can give you a great amount of torque at low speed and thus spin up very quickly- which is an advantage in a dj deck.My sl1210's have dc motors. Thinking about it, it would be easier to regulate a dc voltage to a motor to maintain a constant speed. Plus speed control would be easier.
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