Setting Up; Insertion Of The Tubes - Anthem Audio PRE 1L Operating Manual

WARNING- DISCONNECT THE AC
DETACHABLE POWER CORD FROM THE
Pre 1L AND WAIT 5 MINUTES BEFORE
REMOVING COVER, TUBES OR FUSE.
S E T T I N G U P
The Pre 1L comes with four tubes, as follows:
6922 (LV1 & V1, LV2 & V2)
The 6922 tubes may be replaced with a matched set of
ECC88/6DJ8s or E188CC/7308s with no circuit modifica-
tion. These tubes were chosen for their reliability and
extremely low noise. The amplifier topology used in the
Pre 1L delivers exceptional performance using the 6922
tube. The tubes' low noise heightens dynamics and pro-
vides a natural tonal balance.
INSE RT ION O F THE TUBES
1. Using the screwdriver supplied, remove the cover of
the Pre 1L. For your convenience, only four of the screws
are installed at the factory.
2. When handling the tubes, it is recommended that the
cotton gloves provided be worn to prevent skin oils from
depositing on the glass surface.
3. Noting the location of the tube sockets in the top view
photo (Figure 2) or directly on the PC Board, inspect the
tubes for corresponding labels and markings. Once loca-
tions are mapped, take a tube and inspect the pins, not-
ing the larger space between two of the pins (see Figure
1). This space will match with the socket. Insert each
tube into the appropriate tube socket, making sure all
pins and pin holes are aligned. Do not force the tubes
into the sockets. "Rock" the tubes gently while pushing
slowly until each tube is firmly seated.
Note the larger space
between two of the pins and
holes for proper alignment
of tube and socket.
Figure 1