Something in the owner's manual suggests that the motor might be switchable, perhaps automatically.
________________________________________________________________
INSTALLATION
Place the Radius5 on a rigid level surface (take care to avoid damaging the
surface by the spike feet) . The arm cable should be securely fixed into the base
of the tone arm and connected to the phono input of the amplifier without pulling
on to the Radius5. It is important to ensure the phono input is correct with the
type of cartridge you are using and that the tone arm cable ground lead is firmly
attached to the phono grounding point.
Note that the cartridge/tone arm should be assembled according to
manufacturer’s instructions to ensure correct geometry, tracking weight and
anti-skate force.
Connect the power lead to the correct voltage mains supply and switch the
Radius5 on. The Radius5 platter will start to rotate at the speed corresponding
to the position of the drive belt on the pulley and the mains supply frequency. In
most countries, 220-240Vac supplies are at 50Hz and 110-120Vac mains are at
60Hz. If you are unsure of your mains supply frequency, you can check both
pulley positions and verify the correct selection by listening to a piece of music.
Please note that the motor body is de-coupled and it will oscillate back and forth
while it synchronises with the mains frequency and gets to the correct speed.
This method of mounting and isolating the motor ensures minimal motor noise
break through and stabilises the continuous running speed.
http://www.roksan.co.uk/pdfs/Radius5um1.pdf
_________________________________________________________________
John
