D.W. FEARN
VT-7 Compression Amplifier
17
3 .
I N S TA L L AT I O N
The VT-7 is carefully packed for shipment and it should survive all but the most brutal han-
dling. If there is any damage, keep the shipping material for use during any possible claim for
damage with the shipper. You might also want to keep the box and packaging material in case
you ever have to ship the VT-7.
Included in the box:
1) The VT-7 Compression Amplifier
2) Line cord
3) This instruction manual
Mounting
The VT-7 is designed for installation in a standard 19 inch rack. It requires 5.25 inches of ver-
tical space, but additional spacing between it and adjacent equipment is recommended for
adequate cooling. Ideally, a ventilated panel at least 1 rack unit high (1.25 inches) should be
installed above and below the VT-7 (and around any other heat producing equipment for that
matter). Be sure the top and bottom vent slots are not blocked. It is essential that air can
flow into the bottom and out of the top of the VT-7. Equipment that runs cool can last for a
very long time.
A small (45mm) fan is mounted on the right side panel. The fan outlet should not be blocked.
There are eight vacuum tubes and seven printed circuit boards loaded with solid-state com-
ponents in the VT-7. It generates a lot of heat. You need to think through your mounting
scheme to provide the VT-7 with sufficient air flow for cooling. It will eventually be damaged
if the top and bottom cooling slots are covered. Forced air cooling in your equipment rack
will benefit all your equipment.
The VT-7 can also be used without a rack, placed on a table, counter, or even on the floor if
there is room for air to enter the bottom of the unit. Optional rubber feet are available, when
requested at the time of the order.
Moderate electrical and magnetic fields in the vicinity of the VT-7 should not cause any
degradation in noise performance, due to the well-shielded construction, but proximity to
devices with motors or large power transformers (i.e. tape machines or power amps) should
be avoided.
The VT-7 uses some high frequency signals in the control circuitry and although the VT-7
itself is designed to be immune to these signals, other sensitive equipment mounted above or
below the VT-7 may not be designed as well as the VT-7. You may have to move equipment
that has poor RFI rejection to a location farther away from the VT-7.
