Collins Telecommunications - R390A/URR - Receiver
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Equipment:
R390A/URR
Date:
1956
Category:
Group:
Sub Group:
Information
a. The receiver (fig. 1) is a high-performance,
exceptionally stable, general-purpose receiver for use in
both fixed and mobile service. The receiver provides
reception of continuous wave (cw),modulated-continuous-wave
(mew), amplitude-modulated (am), frequency-shift keyed (fsk)
and single-sideband (ssb) signals within a frequency range
of .5 to 32 megacycles (me). In this receiver, the
radio-frequency (rf), intermediate-frequency (if),
audio-frequency (af), oscillator and power-supply circuits
are situated on individual removable sub chassis (fig. 56
through 72) mounted on a front panel and main frame assembly
(fig. 74). These sub chassis can be removed readily for
trouble shooting and repair in a minimum of time, by the use
of ordinary hand tools. All the sub chassis can be
interchanged between any receivers bearing the same model
number.
b. The receiver furnishes an output of 500 milliwatts (mw)
of af power to a local 600-ohm load (loudspeaker and
headset), and 10 mw of af power for application to a 600-ohm
balanced line, Operation is possible from an alternating
current (ac) input of either 115 or 230 volts ±10 per cent,
48 to 62 cycles per second (cps).
c. Connectors and terminals are provided for use of the
receiver with auxiliary equipment. A 50-ohm, if output
connection is provided for carrier-shift teletypewriter,
single-sideband, or other auxiliary equipment. Automatic
gain control (age) and diode-detector load connections are
available for use in diversity combining systems. When the
receiver is used in a single sideband
reception system, an external age circuit may be substituted
for the internal control circuit. Connections are also
provided for external manual rf gain control; however, when
using only the receiver for single-sideband reception,
manual gain control of the receiver should be used rather
than automatic gain control. A break-in relay for disabling
the receiver circuits is operated by grounding a terminal
provided at the rear of the receiver.
d. The calibration of the receiver is accurate to within 300
cycles per second, an accuracy that permits use of the
receiver as an accurate frequency meter.
Service manual supplement
Manual type:
Service manual supplement
Pages:
9
Size:
530.8 KB
Language:
english
Revision:
Manual-ID:
NAVSEA 0967-LP-063-2120
Date:
August 1967
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
Aug. 4, 2017
MD5:
abf7bd47-ec26-333c-621e-c1432fa09183
Downloads:
0
Service manual supplement
Manual type:
Service manual supplement
Pages:
6
Size:
424.4 KB
Language:
english
Revision:
Manual-ID:
NAVSHIPS 0967-063-2110
Date:
January 1966
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
Aug. 4, 2017
MD5:
9c8af219-b699-2d5f-aaa2-4275dc0306d4
Downloads:
0