Ampex 351 - Page 70

Full-track head assembly
7-2
duces a voltage in the playback head.
The design and construction of these heads
is extremely critical. Their surfaces are lapped
to finishes so smooth that variations are meas 
ured in wave lengths of light. In typical play 
back heads the gap is .00025 inch, which give
an indication of the precision required in build 
ing the heads.
Each of these heads is designed for a specific
function with no compromise in the overall
head assembly. Professional use demands top
performance and there is no room for design
compromise.
The superb design, engineering and manu 
facturing care built into Ampex head assem 
blies assures dependable long life and econo 
mical operation at the lowest cost per operating
hours.
A portion of the section following will de 
scribe briefly by photography the different
types of heads used in Ampex Series 351 equip 
ment and a few significant features of develop 
ment and alignment.
Head assemblies of the Multichannel equip 
ment ordered through Ampex Corporation by
including information relating to equipment
type, equipment serial number, Ampex catalog
number and the description of the part.
Head Assembly
The head assembly is housed in a die cast
housing and contains three heads used in the
89-0144
Issue A