Phono Stage Set-Up; Tube Insertion; Chassis Placement; Screws - Sonic Frontiers PHONO 1 Operating Manual

P HON O ST A GE S ET -U P
You are now ready to begin setting up your phono stage.
INSERTION OF THE TUBES
W A R N I N G
DISCONNECT the AC Detachable Power Cord
from the PHONO 1 before removing the Phono
Stage chassis cover.
Please read and follow these instructions carefully. Great care was
taken in the testing, selection and matching of the supplied tubes in
order to ensure proper operation of the unit. Failure to follow these
instructions will cause this phono stage to suffer in performance and
sound quality.
The PHONO 1 is supplied with four 6922 (6DJ8-type) tubes,
individually boxed and labeled V1-V4.
1 . In order to install the tubes, use the supplied Phillips screw driver
and remove the top cover of the chassis. For your convenience, only a
few screws were installed at the factory to facilitate the easy removal
of the Top Cover.
2 . When handling the tubes, it is recommended the cotton gloves
provided be worn to prevent skin oils from depositing on the glass sur-
face. Find the tubes appropriate for your phono stage, boxed in the
packaging storage compartment.
3 . Inspect the tubes for code markings. They will be coded
individually, each with one of the following codes: V1, V2, V3, V4.
4 . Now inspect the printed circuit board (PCB) above the tube sockets
in the PHONO 1 for the codes matching the codes on the tubes (See
Figure 3 for further clarification).
5 . Take the V1 tube and inspect the pins noting the large space
between two of the pins. This space will align with the same larger
space between two of the pin holes on the socket. Insert the V1
tube into the V1 tube socket, making sure all pins and pin holes
are aligned (see Figure 4). Do not force the tube into the socket.
Rock the tube gently while pushing slowly until the tube is firmly
seated. Repeat this step for the remaining tubes, V2 tube to the V2
tube socket, V3 tube to the V3 tube socket, V4 tube to the V4 tube
s o c k e t .
6 . Once all the tubes are installed, it is now necessary to choose
a setting for the CUE/MUTE function. This is an internal adjust-
ment, see figure 5 for switch location. The setting of this switch
will depend upon whether the line level preamplifier has a conve-
niently located mute switch (ie. the line level preamplifier may be
on an inconvenient lower shelf). Please feel free to experiment to
determine the most ergonomic operation of this feature.
Replace the Top Cover, and using the Phillips screw driver, fill all
the screw positions with the screws provided. There are extra
screws provided in case you misplace a few.
4
N o t e : Partially install the screws, then go back and tighten them all. Do not over-tighten.
7 . You have now completed the preliminary steps of setup.
PHONO STAGE CHASSIS PLACEMENT
The feet of the PHONO 1 Phono Stage are temperature sensitive
and may deform if exposed to excessive heat. DO NOT place
the PHONO 1 on top of any equipment which generate extreme
t e m p e r a t u r e s .
The unit must be placed on a hard flat surface (N O T on carpet),
preferably side by side or on separate shelves with plenty of
unobstructed space all around the phono stage to allow for free
movement of air for proper cooling. Do not operate this phono
stage in an enclosed cabinet - overheating will result.
Allow at least 6" (15 cm) of clear space all around the Phono
Stage chassis for proper ventilation.
V1 V2
V3 V4
Figure 3 - PHONO 1 tube installation locations.
Figure 4 - Tube pin alignment with the socket.
Note the larger space
between two of the pins and
holes for proper alignment
of tube and socket.