NAGRA IV SJ
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DIMENSIONS AND WEIGHT
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Dimensions
of the box as such with the lid closed, without knobs, feet, handle or handle
mounts |
12.6 x
8.8 x4.4" - 318 x 222
x 110 mm |
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Overall
dimensions without the removable handle |
13.2 x
9.6 x 4.5" -333 x 242 x 113mm |
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Thickness
of the Anticorodal sheet used for the box |
.080"
-2mm |
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Thickness
of the tape deck |
.120"
- 3 mm |
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Empty
weight, without batteries or tape |
14 lbs -
6.150kg |
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Weight
with ordinary batteries , 5" reels and tape |
16 lbs -
7.300kg |
POWER SUPPLY |
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Supply voltage, direct current, positive to theground |
12 to 30V |
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Current
consumption |
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on Test |
120 mA |
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on Line Playback |
205 mA |
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on Record |
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direct |
260 mA |
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mic. (1 BK 2619) |
465 mA |
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on Rapid
Rewind |
305 mA |
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Type of
batteries used |
(12
cells) |
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Cel standard |
R20 |
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ASA standard |
D and L
90 |
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Approximate
length of battery life with Eveready E95 manganese dioxide alcaline batteries |
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Continuous use direct |
26 hours |
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mic. |
11½ hours |
MAGNETIC TAPE |
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Nominal
width |
¼"
-6.25mm |
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Admissible thickness |
0.5 to 2
mils, 12 to 50 microns |
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Maximum
reel diameter with lid open |
7" -
178 mm |
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Recording
time at 7 ½ ips with 35 mm (1.5 mils) tape |
45 mim |
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Maximum
reel diameter with lid closed |
5" -
127 mm |
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Recording
time under the same conditions |
22min |
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Rewind
time with 5" reel and 35mm (1.5 mils) tape |
2 min |
TAPE TRANSPORT |
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: |
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Switchable nominal speeds 15 ips |
38.1 cm/s |
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7 ½ ips |
19.05
cm/s |
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3 ¾ ips |
9.525
cm/s |
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1 ½ ips
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3.81 cm/s |
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Stability
of the nominal speed in relation to the temperature (within the specified
range), the position of the recorder, the distribution of the tape between
the reels, and the supply voltage (except on 1 1/2 ips) |
+0.1% |
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Wow and
flutter weighted peak-to-peak value,
in accordance with DIN 45507 standard: |
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15 ips |
+/- 0.05
% |
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7 ½ ips |
+/- 0.07
% |
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3 ¾ ips |
+/- 0.12
% |
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1 ½ ips
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+/- 0.25
% |
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unweighted RMS value, in accordance with NAB standard: |
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15 ips |
+/- 0.06
% |
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7 ½ ips |
+/- 0.08
% |
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3 ¾ ips |
+/- 0.13
% |
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1 ½ ips
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+/- 0.19
% |
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Starting time |
3 seconds |
DIRECT RECORDING TRACKS |
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Amplifier chain
(with out microphone amplifiers) |
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Input
impedance |
l00 kW |
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Overall
accuracy of the attenuator |
0.1 dB |
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Frequency
response from 2.5 Hz to 35 kHz |
0.3 dB |
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Input
voltage for recording at Maximum Peak Level, maximum sensitivity |
10 mV |
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Maximum
admissible level for a distortion of 1 % in
relation to the Maximum Peak Level |
+8dB |
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Signal-to-noise
ratio |
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Linear |
66dB |
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ASA A
weighted |
74dB |
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Crosstalk
attenuation at 1 kHz |
80dB |
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High pass
filter attenuation |
3dB at 20
Hz, 12dB per octave |
Control Instrument |
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PEAK
indication |
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semi-logarithmic
scale, usable from -10 to +23dB |
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frequency
response from 30Hz to 35kHz |
0.5dB |
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integration
time for 2 dB below reference deviation |
5ms +/-
20% |
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AVERAGE
(sonometer) indication |
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normalised
scale, usable from |
-10 to
+12dB |
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frequency
response from l0 Hz to 35kHz |
+/- 0.5
dB |
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FAST
integration time, 200 ms for 1 dB below
reference deviation |
+/- 0.5
dB |
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SLOW
integration time, 500 ms for 4 dB below reference deviation |
+/- 0.5
dB |
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FAST
integration time, 200 ms for 1 dB |
+/- 0.5
dB |
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reading accuracy below 0 dB |
+/- 0.5
dB |
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above 0 dB |
+/- 0.2
dB |
Recording and Playback |
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Nominal
recording level, identical to Maximum Peak Level (M.P.L.) |
320 nWb/m |
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Bias
frequency |
150kHz |
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Bias
switchable according to the tape used, with five possible values ranging from
instrumentation tape (951 type) to chromium dioxide tape |
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Tape used
for testing |
3M 223 |
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Erase
efficiency in relation to M.P.L. |
80dB |
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Frequency response, recording at 20dB below
M.P.L .15 ips-38 cm/s |
25 Hz to
35 kHz +/-1.0 dB |
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7 1/2 ips - 19
cm/s |
25 Hz to
20 kHz +/-1.0 dB |
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3 3/4 ips -
9.5cm/s |
25 Hz to
10 kHz +/-1.5 dB |
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*1 ½ ips- 3.8 cm/s |
25 Hz to
3.5 kHz +/-1.5 dB |
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*
recording possible from 2.5 Hz and transposition to 15 ips for restitution |
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Third
harmonic distortion at M.P.L. |
1.5% |
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Signal-to-noise
ratio |
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linear |
ASA A weighted |
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15 ips-38cm/s |
NAB |
57 dB |
62 dB |
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CCIR |
57 dB |
64 dB |
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7 ½ ips . 19 cm/s |
NAB |
60 dB |
64 dB |
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CCIR |
58 dB |
61 dB |
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Crosstalk attenuation at 1 kHz |
³ 60 dB |
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at 10 kHz |
³ 50 dB |
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Phase fluctuation between tracks at 7 1/2 ips
(19cm/s) and 10kHz |
+/- 12° |
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Outputs |
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Output voltage at M.P.L. on 10kW |
1 V |
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Output voltage for 1 % distortion at 1 kHz |
2.5 V |
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Output voltage for 200 W headphones. adjustable |
0 to 1 V |
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Built-in loudspeaker, power output of
amplifier |
1 W |
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Reference signal level (AVERAGE) |
+10 dB +/-
0.1 dB |
FM TRACK |
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Working
speeds |
15 and 7
1/5 ips - 38 and 19 cm/s |
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Carrier
frequency |
17 kHz |
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Static
linearity |
2% |
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Maximum
frequency deviation Df0 |
+/- 45% |
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Frequency
response at -3 dB |
0 to 4kHz |
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Signal-to-noise
ratio for deviation of +/-20% |
44dB |
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Peak-to-peak
input voltage for deviation of +/-20 % |
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PILOT |
2.8 V |
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CUE |
2.0V |
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OPERATING CONDITIONS |
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Temperature |
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with
manganese batteries |
-4° to +160° F -20° to+ 71° C |
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with
external power |
-67° to +
160° F -55° to+ 71° C |
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The
recorder functions correctly in any position. |
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