Hi Paul I am certain my grandfather had both versions, I am also certain I have seen tape with the holes and remember wondering what that was all about! I should still have the lot somewhere I will try to have a look after the christmas holidays
Thanks for the info..
Quote:
Originally Posted by wd40addict
Barry, I think Scophony also did a 7.2/4.8 ips version of their machine.
Lx, there are 2 types of synchrodeck. The earlier mechanical ones have the tape laced round an idler and the projector connected via a flexible shaft. A differential gearbox is used to compare the relative speeds and its output shaft is used to drive a switch which adds extra resistance into the projector motor circuit.
The later 'electronic' units have a reed switch fitted inside inside the projector to give a pulse per frame. It is used in conjunction with specially punched tape which has 18 (or 24) holes per 3.75 (or 7.5)". Tape and film can now be compared on a frame by frame basis and any difference used to alter the projector speed.
The Synchrodek was designed by a chap called Harry Garlick, and sold through his Craven instrument company. I believe he also used to own a chain of radio & TV shops.
I'm assuming it's the electronic version you have?
Regards,
Paul
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