Running the VPI motors into a PS300 is perfectly fine, but the frequency has to be set to 60 Hz. in order for the platter to spin at 33 and 1/3.
I presume the warnings you received relate to use of AC synchronous motors (like the VPI's) on a PS300 which is set to a Multiwave frequency or frequency other than 60 Hz. Such motors must be run with a 60 Hz. source or will spin at the wrong speed.
I presume the warnings you received relate to use of AC synchronous motors (like the VPI's) on a PS300 which is set to a Multiwave frequency or frequency other than 60 Hz. Such motors must be run with a 60 Hz. source or will spin at the wrong speed.