Audio Research VT80 - In your system

7
To remove the top cover (for VT80
units sold outside of North America)
Using the provided hex-head driver, loosen
the fastening screws from the front and
back edges of the tube cover. Once all of
the screws have been removed, carefully lift
the cover.
After removing the top cover and the vacuum
tubes packed in protective foam, see the Top
Plate illustration to install the tubes for your
VT80 in their proper locations in the chassis.
Note that the numbers written on each tube
correspond to a ‘V’ number etched on the
chassis next to each tube socket. Insert each
tube rmly, carefully aligning the tube pins
with the corresponding socket holes.
In your system
To insure normal component life and safe
operation this unit must be operated only
in an upright position. Adequate airow and
proper cooling can occur only if there is no
restriction above and behind the unit and on
either side.
The special non-marring elastomer feet
provide adequate spacing and stability
only on a smooth, hard surface, and also
assist to isolate the amplier from spurious
vibrations. For upright stability and best
performance, never operate the unit while it
is sitting on a soft surface such as a thick rug
or carpet.
Installation
Due to its weight, this amplier must be
supported on a surface specically rated for
such a load. Check with the manufacturer of
your support system to be sure it is rated to
handle this weight.
If the unit is to be operated in an enclosure
such as an equipment rack or cabinet, make
certain that adequate airow above and to
each side of the unit is provided. A minimum
of 6 inches (16 cm) on top and an open back.
During operation, if there are doors on the
cabinet, they must remain open.
The ‘ambient’ operating temperature
should never exceed 86° F, 30° C. Improper
installation will cause premature tube
failure and will aect your warranty, as well
as the service life of the unit. It is normal for
a vacuum tube power amplier to run quite
warm, and if used for prolonged periods,
hot to the touch. All components within
are operated at safe, conservative levels and
will not be improperly aected providing the
requirements outlined above are adhered to.