Operating instructions
D.W. FEARN
VT-1 & VT-2 Microphone Preamplifers
28
The controls should be set as follows. The numbers refer to Figure 2 on page 21.
• P
ower (8). . . . . . . . . . . . . . . . . . . . . . On
• Input (2). . . . . . . . . . . . . . . . . . . . . . . 0
• Att
enuation (3) . . . . . . . . . . . . . . . . . mid-point
• Phase (4) . . . . . . . . . . . . . . . . . . . . . . Normal
• Met
er (5)
. . . . . . . . . . . . . . . . . . . . . . On
• +48 (1)
. . . . . . . . . . . . . . . . . . . . . . . . as required for mic
If necessar
y
, use the Phase reverse switch. The +48 switch should be off except when need-
ed for phantom powered microphones. Turn the VU Meter off if it is pinning.
The best indication of pr
oper operation of t
he VT-2 is how it sounds. This preamplifier has a
wide operating range and quite often the exact position of the controls is relatively non-criti-
cal.
Be cer
tain that the output level of the VT-2 is appropriate for the device connected to the out-
put. +4 dBm is t
he accepted st
andard level for all professional recording equipment. Some
older equipment may be designed for 0 dBm or +8 dBm, either of which can be easily accom-
modated b
y the VT-2.
Semi-professional equipment frequently uses a reference level of -10 dBv (roughly 14 dB
lo
w
er than pro equipment). Although the VT-2 can fed the unbalanced, -10 dBv inputs of
semi-pro gear with no difficulty, the VT-2 VU meter will have to be recalibrated in order to be
useful. (See Section 6 - Maintenance.)
SUGGESTIONS:
You have chosen to use the VT-2 because of the superior sound it provides. To gain the max-
imum benefit fr
om your investment, it is important that you hook up the VT-2 so that other
f
actors do not adversely affect the sound quality.
1. The VT-2 can be located in the studio or in the control room, but use the shortest
possible cable between the mic and the VT-2.
2. Use t
he best quality mic cable you can. We don’t believe you have to use esoteric
wir
e, but do use a good cable designed for low impedance microphones. A quality
cable with gold-contact connectors is best.
3. Ther
e should be no additional cables, connectors, junction boxes, patch jacks, etc.
between the mic and the VT-2 input.