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Collins Telecommunications R-390A/URR Receiver
Manufacturer:
Model:
R-390A/URR
Date:
1956
Class:
Type:
SubType:
Radio Receiver

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.

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Service Manual
Manual type:
Service Manual
Pages:
32
Size:
3.08 Mbytes (3227558 Bytes)
Language:
english
Revision:
Manual-ID:
NAVSHIPS 93053.42A
Date:
01 January 1964
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
04 August 2017
MD5:
9bc7d3641f28e037ee7dd46ad69bf483
Downloads:
705

Information

MAINTENANCE STANDARDS BOOK

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Service and User Manual
Manual type:
Service and User Manual
Pages:
257
Size:
42.28 Mbytes (44334270 Bytes)
Language:
english
Revision:
Manual-ID:
TM 11-856A
Date:
01 January 1956
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
04 August 2017
MD5:
f281d232c879d7d63a197ff77244978f
Downloads:
1008

Information

CHAPTER I. INTRODUCTION Section I. General ... 1,2 1 II. Description and data ... 3-10 2 CHAPTER 2. INSTALLATION ... 11-17 9-17 CHAPTER 3. OPERATION Section I. Controls and instruments ... 18,19 18 II. Operation under usual conditions ... 20-28 19-24 III. Operation under unusual conditions ... 29-32 24-25 CHAPTER 4. ORGANIZATIONAL MAINTENANCE Section I. Tools and equipment ... 33,34 26 II. Preventive maintenance services ... 35-39 26-29 III. Lubrication and weatherproofing ... 40-41 30 IV. Trouble shooting at organizational maintenance level ... 42-50 30-39 CHAPTER 5. THEORY Section I. Theory of Radio Receiver R-390A/URR ... 51, 52 40, 43 II. Circuit analysis ... 53-78 44-87 III. Analysis of mechanical tuning system ... 79-81 88-94 CHAPTER 6. FIELD MAINTENANCE Section I. General trouble-shooting techniques ... 82-85 95-97 II. Trouble shooting Radio Receiver R-390A/URR ... 86-120 97-134 III. Repairs ... 121-134 134-151 IV. Alignment and adjustment procedures ... 135-152 151-165 V. Final testing ... 153-168 165-174 CHAPTER 7. SHIPMENT AND LIMITED STORAGE AND DEMOLITION TO PREVENT ENEMY USE Section I. Shipment and limited storage ... 169,170 175 II. Demolition of materiel to prevent enemy use ... 171,172 176 INDEX ... 189

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