| JimmyB |
Hi there,
I've had a good forum search but haven't found any mention of a turntable power supply for an AC Synchronous motor as in the Rega P9 or the HEED AUDIO Orbit.....
Has anyone got a design for such an appliance? I'm quite interested in building one as an alternative to the usual DC option (which I also have at home). :o
Rega & Heed seem to regenerate the pure 50Hz (60Hz) signal so essentially a waveform generator....is this an easy one?
regards & confused,
Jimmy |
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| analog_sa |
| quote: | | Rega & Heed seem to regenerate the pure 50Hz (60Hz) signal so essentially a waveform generator....is this an easy one? |
There has been a lot of discussion. Go on searching. Whether it's easy depends only on your abilities. Not as easy as a gainclone; not quite as difficult as a tube phono :) |
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| peranders |
Jimmy, this is rather easy:
1 Generate 50 Hz sinus from a microcontroller with DAC output, PWM output or from 8 I/O pins (and make your own DAC with R-2R technology), use a wien bridge, use a CMOS oscillator with a LP-filter. You have many options for generating sinus signals.
2 Feed the signal into an power amp, 5-20 Watts, approx 10-15 VAC into a 230/12 transformer backwards. |
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| analog_sa |
| quote: | | 1 Generate 50 Hz sinus from a microcontroller with DAC output, PWM output or from 8 I/O pins (and make your own DAC with R-2R technology), |
That's exactly what i've done. If the controller has enough ports you can even generate a second phase and discard the cap. |
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| JimmyB |
New it would probably be embarassing asking the question!!
Thanks for the help, since I work for a company which designs & produces DAC chips, that sounds like the way to go (cheap as chips :rolleyes: ).
regards,
Jimmy |
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