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Page 6 SET 40 Owner's Manual
Initial Setup and Assembly
certain that the tube is down far enough. The
metal tube base should protrude less than 1/4"
from the top of the tube socket when the pin is
at the bottom of the slot in the socket. When
you are certain that the tube is in place, then
rotate the tube approximately 1/8 turn in the
clockwise direction.
The tube should be nearly vertical or leaning
slightly. NOTE: Be certain that the bayonet pin
is at the bottom of the slot before applying
rotational force on the tube. The pin could be
damaged if too much force is applied if it is not
at the bottom of the slot. Place the tube cover
ring assembly over the 845 and push it home
into the three sockets for the banana type plugs
on the ring assembly.
4. When the 845 tube is in place, check that
the 4-12AX7 input/driver tubes are correctly
seated in their sockets. These should be in
place when the amplifier is received. If there
are any questions at this point contact your
dealer.
Figure 1.
Input Tube Types and Positioning
One Channel Shown
12AX7
ECC83
12AX7
ECC83