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In Reply to: RE: Phoenix Engineering Falcon PSU (similar to VPI SDS) review video posted by Drew769 on July 29, 2014 at 11:41:16
I'm using a $55 variac with outstanding results. The biggest improvements in power to VPI tables seem to come from voltage reductions rather than speed control. I start at 110v and back down to 60v for playback. Sounds great at less than 1/10th the cost of these units.
It's the VOLTAGE that makes the biggest difference. Lower voltage smooths the synchronous pulses that get into the platter through the belt(s). Lower voltage means softer pulses, lower noise.
Follow Ups:
I've been telling people who call to get a Variac for probably 25 years! It really works but it will not stabilize the frequency like the SDS does if you are going for the last ounce of speed stability. A $100.00 metered Variac does a wonderful job on a synchronous motor table and for that matter it does a great job on power amps setting the voltage to the exact amount that sounds the best in your setup.
I run my big Mac amps at exactly 117V, sounds best that way.
HW
HW, does it do any damage to operate an Aries or TNT motor to operate at 60v after start-up at 110v? Doesn't seem to get warm or fail to hold speed.
As long as the motor locks on and stays synchronous you are fine. When it starts vibrating and going out of synch you are too low!!
Thanks, Harry. I'm very pleased with my Aries (extended) and the accompanying JMW-12 arm. And the variac made a nice improvement.
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