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<DIV>Hi Park:</DIV>
<DIV> </DIV>
<DIV>All of the Type-A 1" machines up thru the VR-7800 had the switch above the
vertical interval. The VPR-7900 was the first to place it in the
vertical. Remember also that the Type-A machines are single head, so there
is more than a "switch", there is a dropout for several lines. The VR-660
is a 2-head design so there is a switch and no dropout.</DIV>
<DIV> </DIV>
<DIV>When Sony made their first 1/2" machines, there was apparently some
"reverse engineering" done on their Ampex predecessors. Although the Sony
machines were 2-head, they had a "blanking" circuit that covered up the
switching point and produced a totally blank area in the same location
as the Ampex Type-A. There was no logical reason for that other
than replicating the output signal of the Ampex. The practice was
discontinued in subsequent models.</DIV>
<DIV> </DIV>
<DIV>Don Norwood<BR><A
href="http://www.digitrakcom.com">www.digitrakcom.com</A> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=park@videopark.com href="mailto:park@videopark.com">C. Park
Seward</A> </DIV>
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<DIV>
<DIV><BR></DIV>
<DIV>Didn't some of the early Ampex 1" VTRs have the switch in visible picture
but the 660 series had it lower???</DIV>
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