Go to VPI's website and download the SDS calibration manual. In the manual are detailed instruction on how to adjust the SDS "steady state" voltage (run mode). For 45rpm, the factory default should be either 90 or 102 depending on the software version. If your SDS is dropping from 115v to 72 v after startup when in the 45rpm setting, it needs to be adjusted higher. You cannot hurt your table by trying a higher steady state voltage. I hope this corrects your problem
VPI SDS 45 RPM malfunction
I have a brand new SDS unit that I've used for about a month now and it's been working fine at 33 rpm, but last weekend I tried to put on a 45 rpm record and the unit malfunctioned. I was able to adjust the frequency up to 80.80 Hz, which the strobe indicated resulted in correct speed, but the voltage would flicker between 72 and 115 V for several seconds and settle at 72. It seemed the turntable was holding speed at 72, but when I put the record on and the periphery ring, the SDS kept going back and forth in frequency between 33 and 45 (up and down between approx. 60 to 80 Hz and the motor would audibly "slip" when the SDS got to 80.80 Hz and then started going back down).
Is this a matter of adjusting the unit or is the unit broken? I sent an email to VPI, but I know they are very busy so I thought in the meantime I'd ask here. Any ideas or suggestions?
Is this a matter of adjusting the unit or is the unit broken? I sent an email to VPI, but I know they are very busy so I thought in the meantime I'd ask here. Any ideas or suggestions?
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- 20 posts total
- 20 posts total