Installation; Before Operating The Reference 750 Se - Audio Research Reference 750 SE Manual

Before operating the Reference 750 SE

Your Reference 750 SE amplifier is shipped
with the vacuum tubes packed in foam
blocks. These must be unpacked and installed
before you attempt to operate the amplifier.
Included are a set of 16 KT150 output tubes,
a matched pair of KT150 driver tubes, one
6H30 dual triode used in the input stage, as
well as one 6550WE and one 6H30 for the
power supply regulator. Proceed according to
the following instructions.

Installation

+12V FANS
V19
V17
6H30
V13 V15
V9 V11
V5 V7
V1 V3
Carefully remove each vacuum tube from
its protective foam and match its location
'V' number (written on the base of the tube)
to the 'V' number printed next to each
socket. Firmly seat each tube in its matching
socket, taking care to 'key' the tube pins to
the socket holes. The two vacuum tubes for
the power supply are installed internally;
using the included Phillips-head screwdriver,
remove either side panel of the amplifier, and
the tube sockets can be found in the center
of the second-level circuit board. Retain the
foam blocks with other packing materials for
possible future use.
6
V18
V16 V14
V12 V10
V8 V6
V4 V2