Ampex 351 - Page 71

Tivo-track head assembly
7-3
operating process. The heads are respectively
erase, record and playback as viewed from left
to right when facing the machine. The gate on
the assembly holds the playback and record
shield covers and the tape-lifting fingers. The
function of the tape lifting fingers is to remove
the tape from the heads when the gate is open
during the REWIND and FAST FORWARD
operation. The tape may leave a deposit on the
heads if allowed to contact them at high
speeds. Such a deposit will seriously impair the
performance of the machine and should be
guarded against by always opening the gate in
the FAST FORWARD and REWIND modes.
If a deposit is left, it may be removed by
xylene on a soft cloth or tissue. Never use
metal of any kind to touch the head surfaces.
DUAL TRACK HEAD ASSEMBLIES .............
The dual track head assembly is constructed
for two track erase (separate erase) operation.
89-0144
Issue A
The gates should never be allowed to spring
shut, but should be closed gently.
SINGLE TRACK HEAD ASSEMBLIES
Single track head assemblies offered for use
in the 351 equipment are half track or full
track configurations. The half track operation
is constructed to allow only a portion of the
tape to be erased, recorded or reproduced. Full
track operation allows the entire width of the
tape to be utilized (see chart for information
on head configuration and Ampex Catalog
Numbers).