To convert old VHS tapes, I use a Sylvania DVR90VE which consists of a stand alone DVD Player/Recorder and a VHS tape deck in one cabinet. I have used it to convert 50+ old VHS tapes to a DVD format with completely satisfactory results.
You record (“Dub”) the VHS tape to a DVD-R or DVD/RW blank and the result is a collection of VOB files in a VIDEO_TS folder, which is just like a standard DVD but of course without copy protection. To import into PD9, you just reference one of the VOB files.
One caveat: Although PD9 would allow me to specify one of the VOB files on the DVD disc as input media, the import process was a lengthy 4 or 5 min (for a 1 GB VOB file) , and the result was jittery when played in PD9.
I found that if I copied the resulting VOB file from the DVD disc to the hard drive in my computer, and then imported into PD9 from there, all was fine - no audio or video jitter present.
Loss of audio/video sync has never been a problem when viewing the dubbed DVD content.
A nice side effect is that the DVD you created is can be regarded as a backup of your old VHS tape.
Good Luck.