I sent Mike at VPI an email. He said it sounded like a loose pulley and sure enough that was it. Speed is spot on now. Thanks for all your ideas.
Scoutmaster runs very slow
I have a Scoutmaster and the SDS. When I plug the Scoutmaster directly into the wall and measure speed with the KAB Speed Strobe 10 numbers drift by, moving right, in about 5 seconds. KAB states 10 numbers in one minute represents .3% accuraccy, so I'm really slow. Using the VPS, turned up to 66 frequency, 10 numbers drift by in around 15 seconds, better but still very slow. The voltage number reads 84. I would appreciate any suggestions