D.W. Fearn VT-1 Operating instructions manual - page 15
Manual is about: Vacuum Tube Microphone
Preamplifiers
of
40
D.W. FEARN
VT-1 & VT-2 Microphone Preamplifers
15
1 .
S P E C I F I C AT I O N S
Input
150 ohms
Input Load
Impedance
1.5k ohms
Minimum Input
Level
-65 dBm nominal
Maximum Input
Level @ 20 cps
-30 dBm without pad
-5 dBm with 20 dB pad
Gain
53 dB minimum
Frequency
Response
± 0.2 dB 20 cps to 20 kc
± 0.5 dB 11 cps to 28 kc
-3 dB @ 0.5 cps & 50 kc
THD + Noise
<0.25% 20 cps to 20 kc
Intermodulation
Distortion
SMPTE: <0.80%
Signal to
Noise Ratio
74 dB minimum
Equivalent
Input Noise
-124 dbm maximum
Output
low-Z, transformer balanced
Maximum
Output Level
+22 dBm unterminated
Power
Requirements
100, 120, or 220 VAC
50/60Hz, 25 W
Dimensions
19” (48.26cm) W
5.25” (13.34cm) H
9” (22.86cm) D (VT-2 13” 22.9cm)
Weight
VT-1 14 lbs (6.35 kg)
VT-2 18 lbs (8.16kg)