[QuadList] New Octaplex recorder design

[Don Norwood]

Following up with a little more info, attached is a pic of the head 
assembly, a pic of a "modern" RCA octaplex head, and the track format specs 
for the machine.

You can see that the RCA head very closely resembles a quad video head, 
except that it has 8 transducers on the drum.  Additional studying of the 
manual indicates that the female guide on the early Ampex did not have any 
vacuum.  Instead, the tape path appears to have placed the guide slightly 
outside of the normal plane of the tape path, thus causing the tape to 
travel against the guide.

Don 
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