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TECHNICAL DATA
Power Required
One MI -11301-B Power Supply or a -c, d -c supply
as follows:
a. D -C Plate Supply
Term.
Volts
Milliamperes
Radiotrons*
11 RCA -1620 or 11 RCA-6J7t
2 RCA -1621 or 2 RCA-6F6t
2 RCA -1622 or 2 RCA-6L6t
tMay be used when maximum uniformity of
characteristics, and minimum of microphonics,
116
375
62.0
hum, and distortion are not required.
115
114
210
278
1.2
5.1
Inputs
104
285
42.0
a.
Six
30-
or
250 -ohm
microphone inputs
105
220
4.6
(balanced )
Reg.
245
16.0
b. Six
line inputs,
150,
300, and 600 ohms
106
(balanced)
Emerg.
200
13.0
c. Two 250 -ohm transcription inputs (unbalanced )
b. A -C Filament Supply
Term.
Volts
Milliamperes
d. One 250 -ohm talk -back microphone input
(balanced )
112 and 113
6.2
2.7
e.
Five 20,000 -ohm monitor cue lines (balanced )
109 and 110
6.2
1.6
Outputs
107 and 108
6.2
0.3
a. One 500- to 600 -ohm line
101 and 102
c. D -C Relay Supply
6.2
2.4
b. Three 15 -ohm monitor lines
c. One high -impedance headphone output (2,000
Term.
Volts
Milliamperes
to 5,000 ohms)
117 and 118
60
100
Line Output Noise Level
Gain
a. Microphone Input to Line Output: 112+2 db
b. Transcription Input to Line Output: 81 +1 1/2 db
c. Line Input to Line Output: 54+1 1/2 db
d. Microphone Input to Monitor Output:
110+2 db
e. Line Input to Monitor Output: 54+2 db
f.
Transcription Input to Monitor Output:
80+2 db
g. Cue Input to Monitor Output: 34+2 db
h. Talk -back Input to Monitor Output: 95 +2 db
i.
Line Output to Monitor Output: 33 ±2 db
j.
Microphone Input to Emergency Line Output:
91+2 db
k. Remote Line through Override: 27 +21/2 db
1.
External Record: 90+2 db
m. Remote Talk -back: 77+2 db
Line Output Level
Normal: +18 dbm** with 0.5% rms harmonic
distortion from 50 to 7,500 cycles
Maximum: +26 dbm** with 1% rms harmonic
distortion from 50 to 7,500 cycles
Microphone Input at -50 dbm, to Line Output
at 18 dbm** output (68 db system gain): -68 db
Microphone Input to Monitor Output at 4 watts
(+36 dbm**) output (86 db system gain ): -68 db
Distortion
a. Microphone Input to Line Output: 0.5% rms
harmonic distortion from 50 to 7,500 cycles,
with normal output of +18 dbm**
b. Microphone Input to Monitor Output: 11/2%
rms harmonic distortion from 50 to 7,500
cycles at 4 watts output
Frequency Response
a. Microphone Input to Line Output: +2.0 db
from 30 to 15,000 cycles
b. Microphone Input to Monitor Output: +2 db
from 30 to 15,000 cycles (audition channel)
Monitor Power Output
a.
4.0 watts
( +36 dbm**) with
11/2% rms
harmonic distortion from 50 to 7,500 cycles
b. 8.0 watts ( +39 dbm**) with 3% rms harmonic
distortion from 50 to 7,500 cycles
Physical Specifications
Width
39
inches
*TRADEMARK RADIOTRON- REG. U. 5. PAT. OFF. BY RADIO CORPORATION OF AMERICA
**dbm
= decibel level referred to one milliwatt sine wave power.
Depth
Height
Weight
17
inches
10 1/2 inches
135
pounds
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