Ampex 201 Operation Maintenance

Page 2

MODEL 201 CONVERSION

Model 201 Conversion Kit consists of the following:

Head Assembly MP-h75-3
Playback Amplifier NIP-667
Record Amplifier LIP-666
Power Supply Imp-656

The kits are shipped in sets. If these sets are not broken,
no electronics adjustment will be necessary. If these sets are broken,
minor level adjustments my be necessary as well as Bias and Noise Balance
adjustment on record. Great care has been taken to maintain mximm
possible uniformity in all components.

INSTAIIAT ION :

Remove Record dhassis, Playback Chassis, and Power Supply Chassis
from Model 200 Recorder. Remove playback cable from top plate by removing
the two Allen-head screws. Remove old Head Assembly. Remove Gutter m.

Install new Playback Cable assembly with Allen-head screws used
to hold the old cable in place on the top plate. A: plastic clip has been
included with the cable assembly and should be used to fasten the center
of the cable to the center of the shelf in the cabinet. This is to prevent
the cable from coming into close proximity with the drive motor, and thereby
prevents the injection of hum into the playback system from same.

Next, plug in the new head assembly and bolt in place with the
two 1/h inch Allen flat head bolts supplied.

Plug in new power supply and amplifiers. Plug erase, record,
and playback cables in same. Make sure that record and erase cables have
not been interchanged. Plug in strapped plug in place of 10 or 16 Db. pad
in gutter.

OPERAT ION :

The record Level control has been set to effect proper record
level on M 111 tape when the machine is bridging a f h w Program Bus.
The playback level is adjusted to play a tape so recorded at a level of

+ )4 W into a 600 ohm terminated line. 130th input and output lines may
be either balanced or unbalanced. It is assumed that the machine has a

strapped plug in the gutter. ( a, db. attenuation )