D.W. FEARN
VT-12 Microphone Preamplifer
19
3 .
I N S TA L L AT I O N
The VT-12 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 possi ble claim for
damage with the shipper.
Included in the box:
1) The VT-12 Microphone Preamplifier
2) Line cord
3) This instruction manual
Mounting
The VT-12 is designed for installation in a standard 19 inch rack. It requires 5.25 inches of
vertical space, but addi tional spacing between it and adjacent equipment is recom mended for
adequate cooling. Ideal ly, a ventilated panel at least 1 rack unit high (1.25 inches) should be
installed above and below the VT-12 (and around any other heat producing equipment for
that matter). Be sure the bottom vent slots are not blocked. It is essential that air can flow
into the bottom and out of the top of the VT-12. Equipment that runs cool can last for a very
long time. A 1RU vented panel, the D.W. Fearn VRP painted in the same red as our products
is available.
In tight equipment enclosures, be sure there is adequate air flow. Forced air cooling will ben-
efit all your equipment.
The VT-12 can also be used without a rack, placed on a table, counter, or even on the floor.
Optional rubber feet are available, when requested at the time of the order.
Moderate electrical and magnetic fields in the vicinity of the VT-12 should not cause any
degradation in noise perfor mance, 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.
Although the vacuum tubes in the VT-12 are selected for minimum microphonic response, it
is a good practice to avoid mounting locations that subject the VT-12 to very high sound or
vibration levels.
Summary of Contents for VT-12
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