However... I thought the "stop even in pause" signified the drum wasn't rotating, which would be directly driven, surely?
might be worth finding out mechanically equivalent machines for belts etc.
ppppenguin wrote:Cathovisor wrote:I'm amazed the heads are belt driven - sounds like a servo nightmare...?
You think a teeeny weeny belt driven VHS drum is a sevo nightmare. Have you ever worked on an Ampex VR7003 or other 1" A format VTR? Ruddy great drum essentially identical to C format, driven by a belt. A least C format machines had direct drive for the drums.
Cathovisor wrote:Belt-boiling was a really cheapskate, nasty trick and is to be strongly deprecated.
I don't know if Charles Hyde sell to the public, but:
Cathovisor wrote:Well, it does look like CHS take plastic from the public, Marc...
The jittering you experienced sounds like it's the flywheel sync of the TV jittering to the irregular line pulses from the tape, they are so because of the stability (or lack of) from the VCRs motors. This is why many late 70s and early 80s sets had an AV or VCR preset, to decrease the time constant of the flywheel sync that would otherwise be used for avoiding line jitter in poor signal areas. Sets without this feature would often come with modification instructions to manually do the same job.
Cathovisor wrote:I'm amazed the heads are belt driven - sounds like a servo nightmare...?
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