Hello,
I'm currently deep into research for building my first turntable mainly around rega parts.... I have chosen Rega parts as they seem readily available, good quality and I can't work out how to calculate pully sizes in order to get correct speed, so have chosen to get a standard rega motor, pully and subplatter and hope it runs at the right speed... how much does platter weight affect speed??... maybe someone can help with this.
So my main question is, once i've bought an old rega motor off ebay, I understand I need to connect it to a couple of capacitors (I think)... can some one draw me a quick diangram to show what wire should be connected to where... then do different switches add different resistances, so will I have to add in resistors if I use a non standard rega switch?...
sorry for the basic questions, I know I can make the plinth good but the rest is beyond me... I'm handy enough though once I understand.
Thanks for your help.
I'm currently deep into research for building my first turntable mainly around rega parts.... I have chosen Rega parts as they seem readily available, good quality and I can't work out how to calculate pully sizes in order to get correct speed, so have chosen to get a standard rega motor, pully and subplatter and hope it runs at the right speed... how much does platter weight affect speed??... maybe someone can help with this.
So my main question is, once i've bought an old rega motor off ebay, I understand I need to connect it to a couple of capacitors (I think)... can some one draw me a quick diangram to show what wire should be connected to where... then do different switches add different resistances, so will I have to add in resistors if I use a non standard rega switch?...
sorry for the basic questions, I know I can make the plinth good but the rest is beyond me... I'm handy enough though once I understand.
Thanks for your help.
Weight affects acceleration, not velocity. The more weight, the more inertial moment, so it will demand more time and or more power to the motor to reach final velocity. Same difference between a car and a truck, supposing same motor power.
You must get the motor wiring. Run capacitor depends upon motor design. Over graded cap will overload the coil, and undersized the motor has low power at the axis.
Circuitry here: http://www.mclennan.co.uk/datasheets/european/synchronousdata/990411131813.pdf
For 220-240V, Rega have a 12Kohm 5W resistor in series. The original circuit shows 6K8, which outputs a higher line voltage to the motor. Rega reduced the voltage for lesser vibration and smoother operation. I think that is the norm found in any Rega using that same 110VAC motor. The same 12Kohm resistor also worked very well with a Thorens Pabst 110V motor.
For 220-240V, Rega have a 12Kohm 5W resistor in series. The original circuit shows 6K8, which outputs a higher line voltage to the motor. Rega reduced the voltage for lesser vibration and smoother operation. I think that is the norm found in any Rega using that same 110VAC motor. The same 12Kohm resistor also worked very well with a Thorens Pabst 110V motor.
All that advice is great thanks, although I have to admit some of it went over my head a little. My knowledge of electics is 'shockingly' bad.
I just got a motor of ebay that had been taken from a P3 and is the newer style stick on type rather than screw screw on susbpended by an elastic bad type. This comes with a little circuit board which is great but has no switch... so my quextion is when i buy a switch do different switches create different amounts of resistance in the circuit. I have found a nice toggle switch with and led on the end but fear this may cause more resistance than the original rega switch... if this is a problem what should I be looking out for when i get a new swith to match regas?
I just got a motor of ebay that had been taken from a P3 and is the newer style stick on type rather than screw screw on susbpended by an elastic bad type. This comes with a little circuit board which is great but has no switch... so my quextion is when i buy a switch do different switches create different amounts of resistance in the circuit. I have found a nice toggle switch with and led on the end but fear this may cause more resistance than the original rega switch... if this is a problem what should I be looking out for when i get a new swith to match regas?
Many a true word spoken in jest...
Any decision you make here -- switches, wiring, anything -- could have consequences for your home insurance policy. Regarding injury, there have been some sad incidents among DIYers dealing with electricity, and some of these people checked their facts on the internet first...Some things are neither 'common sense' nor 'simple.' Because you're more experienced than most, you might decide to refer this aspect of your project to someone qualified/insured to do this kind of thing (check their credentials as well). Your local Rega dealer might do it for you, in which case I recommend ditching the Ebay motor and choosing the latest spec Rega motor/power supply kit.
In any case: good luck, keep safe, and happy listening.
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