Hi,
the internal regulator of the high torque models like SL1200ii, etc. provides for 21V to the circuitry.
For the consumer models with lower torque like SL5310 or SL2/3 its 12V.
Add 3V or more for the regulator itself and You are at 24V resp. 15V ... typical standard voltages for power supplies.
Higher voltages are neither required nor positive but just result in higher heat dissipation
I assume though that Technics designed with a way larger 'overhead' of more than 10V plus to allow for a larger ripple budget, hence the useage of a smaller smoothing cap and still achieve long lifetimes.
10W/5W supplies are fully sufficient, i.e about 0.5A.
I used small encapsulated SMPS from Meanwell, small enough to replace the original transformers.
No need to fuss around with a 'external' solution.
I run MCs and MMs and have no noise issues whatsoever ... and doubt very much that external overkill-design supplies do any better.
jauu
Calvin
the internal regulator of the high torque models like SL1200ii, etc. provides for 21V to the circuitry.
For the consumer models with lower torque like SL5310 or SL2/3 its 12V.
Add 3V or more for the regulator itself and You are at 24V resp. 15V ... typical standard voltages for power supplies.
Higher voltages are neither required nor positive but just result in higher heat dissipation
I assume though that Technics designed with a way larger 'overhead' of more than 10V plus to allow for a larger ripple budget, hence the useage of a smaller smoothing cap and still achieve long lifetimes.
10W/5W supplies are fully sufficient, i.e about 0.5A.
I used small encapsulated SMPS from Meanwell, small enough to replace the original transformers.
No need to fuss around with a 'external' solution.
I run MCs and MMs and have no noise issues whatsoever ... and doubt very much that external overkill-design supplies do any better.
jauu
Calvin