|AN/SIH-501||Public Address System||SIH-501 is listed in BRCN 213 (circa 1960) , the RCN's Materials Catalogue Otherwise, no photo or info available.|
|AN/SIH-502||Public Address System|
|AN/SIH-503||Public Address System||See details in Feature Section.
Reference Manual: C52-101-000/MS-000
|IC/SAE||Broadcast||IC/SAE is listed in BRCN 213 (circa 1960) , the RCN's Materials Catalogue Otherwise, no photo or info available.|
|AN/SIH-600||Entertainment System||No photo or info available.|
|AN/SIH-601||Entertainment System||SIH-601 is listed in BRCN 213 (circa 1960) , the RCN's Materials Catalogue Otherwise, no photo or info available.|
|SONY||Entertainment System||See details in Feature Section.|
|AN/PIC-2||Portable, Hand Held Loud Hail||Click link for drawing. (Image courtesy RCN)|
|BZ 5006||Man Aloft and Summary Alarm Panel||See details in Feature Section.|
|HT 440||Motorola VHF Handheld Radio||Frequency range: 150.8 to 174 MHz.
4 preset channels. Power: Up to 5 watts.
Canadian warships are normally preset to channels 6, 8, 10, and 16. Click link for photo. (Image courtesy RCN)
|AN/PRC-25||Manpack Radio||See details in Feature Section.|
|AN/PRC-512||VHF Radio||See details in Feature Section.|
|AN/PRC-515 (RT-5047/URC)||Portable HF Transceiver||See details in Feature Section.|
|IC/KAA||Intercom||See details in Feature Section.|
|AN/WIC-501||Intercom||No details available.|
|AN/SIC-503||Intercom||See details in Feature Section.|
|AN/SRC-507||Flight Deck Broadcast System||Refer to block diagrams section.|
|AN/SRD-501||LF/MF/HF Direction Finding Set||See details in Feature Section.|
|AN/SRN-12/R-1481||Omega Navigation Receiver||See details in Feature Section.|
|AS-2283/SRN-12||Antenna Coupler for SRN-12||No photo available.|
|DAU||HF Direction Finding Set||Click link for more info.|
|LC 204||Loran 'C' Receiver||See details in Feature Section.|
|AN/URN-20A(V)1||TACAN (Tactical Navigator)||See details in Feature Section.|
|AN/URN-25||TACAN (Tactical Navigator)||See details in Feature Section.|
|HP5061A||Cesium Beam Frequency Standard||See details in Feature Section.|
|OA 4792/SRC-23||Frequency Standard Group||See details in Feature Section.|
|SB 5091/SRC||Patch panel. Used with above||No photo available|
|AM 5230||Distribution Amplifier. Used with above.||No photo available|
|List 21||List 22||List 23|
ISL= Improved St. Laurent Class
IRE= Improved Restigouche Class
MACK= Mackenzie Class
|ANS= Annapolis Class
TRIBAL = 280 Class
AOR = Supply ships
|Top: HP 5061A - Cesium Beam Frequency Standard
Accuracy: 1 part in 1011
Output Frequencies: 5 MHz, 1 MHz and 100 KHz . 1 Pulse per second (PPS) output for use as an external clock.
Primary Power - 115 V AC.
Bottom: OA/SRC 23 Frequency Standard Group
Purpose - To supply 100 KHz standard through SB 5091 patch panel and
AM 5230 amplifier to various pieces of equipment.
BZ 5006 MAN ALOFT AND SUMMARY ALARM PANEL
|BZ 5006 Man Aloft and Summary Alarm Panel. Purpose - provides a summary visible and audible alarm when a fault occurs in one or more of the 7 HF transceivers or 9 VHF/UHF transceivers, 2 frequency standards, or its own internal power supplies. A means of over riding the "fault" indication is provided. Three key operated switches are used to provide the man aloft function for the HF, UHF and for one MF transmitter. The unit operates from 115V AC and is normally left "ON" as it is the emergency power source for the OA/SRC 23 Frequency Standard Group and the AN/URA 64 RF Switching group. (Image courtesy Canadian Navy)|
AN/SIH-503 PUBLIC ADDRESS
|AN-SIH-503. Provides amplified voice and general alarm signals to various areas of the ship. Has a maximum of 10 control units, 1 test set and a console/equipment cabinet housing 6 amplifiers and 2 power supplies. Image courtesy Canadian Navy)|
|AN/SIC 503 - INTERIOR COMMUNICATIONS SYSTEM
The photo above was taken in a training facility and is meant to only represent a few elements of the system. Refer to the AN/SIC-503 pictorial at the bottom of this document to see all system components.
Consists of the following units:
LS 5012 (A2) - 30 Pushbutton Control Unit, Provides selection of 29
Secondary Power Distribution Unit (102) (two units)
Power Conversion Unit (l0l) (two units)
Talk Back Unit (103)
Relay Unit (AI)
Primary Power Distribution Unit (two units)
J-I0l3 Junction Box
AN/SIC-503 SECONDARY POWER DISTRIBUTION UNIT
|AN/SIC-503 - SECONDARY POWER DISTRIBUTION UNIT. Each unit has
all the 30.2V DC lines fuzed and distributed to a maximum of 48 stations.
Local/Remote switch allows using the other 30.2 V DC supply. Refer to the AN/SIC-503 pictorial to see how this distribution unit fits into the system. (Image courtesy Canadian Navy)
Sony Entertainment System
|Sony Entertainment System consisting of: (top to bottom) an Allander AM/FM receiver, monitor panel, a Sony stereo cassette tape deck and a McMartin power amplifier. (Image courtesy Canadian Navy)|
|AN/UIP-501 Public Address Set showing a sample speaker. (Image courtesy Canadian Navy)|
|UIP-501 Audio Frequency Amplifier. This example can be found at the Marcom Museum in Halifax. (Photo by Jerry Proc)|
|IC-KAA Intercom. Provides voice communications between vital positions throughout the ship. (Photo by Jerry Proc)|
|AN/PRC-25 . Manpack radio set, 30-76 MHz, 920 channels, 50 KHz channel spacing, Synthesized frequency control. Mode: WBFM. Power: 1-2 watts, solid-state except for the RF power amplifier vacuum tube. Weight 23 lbs. The first hand-built operational versions of this set appeared around 1957. (Image courtesy Canadian Navy)|
|AN/PRC-515. (RT-5047/URC) Portable HF Transceiver. Frequency range 2 to 29 MHz. Modes of operation include USB, LSB, AME, CW and line audio input for data transmission. Power output 20 watts. Note the CW key which can be strapped to the operator's thigh. (Image courtesy Canadian Navy)|
R5051/ SRD-501 LF/MF/HF DIRECTION FINDING RECEIVER
The AN/SRD-501 was acknowledged to be a piece of absolute junk by those who used it.
It was a hybrid unit with tubes on the lower deck and solid state on the upper deck (and yes, heat does rise). It was impossible to reach sensitivity or calibration specifications because immediately that the case was opened or closed the ambient temperatures changed and the operating parameters changed. Usually the SRD was never turned off because once it cooled down and then flashed up, it required a complete IF alignment!
No end of "UCRs" (unsatisfactory condition reports) ever brought a resolution to the ensuing problems. The specifications were changed so that a 20 µv sensitivity was acceptable. One technician said "When I was personally responsible for this equipment, I ensured that I got maximum sensitivity and selectivity for 500 kHz and 2182 kHz and hoped it did well for everything in between".
R5051/SRD-501 DF set. (Image courtesy Canadian Navy)
* Frequency range: 60 kHz to 30 MHz
* Modes: AM, FM, FSK, CW, SSB, PPM
* Accuracy: +/- 1 to 2 degrees with a range up to 70-80 miles on ground wave only. Not
accurate on sky waves. Obtaining the sense, (boiling out ambiguity) was difficult above 6 MHz.
This unit contains two receivers and was used by EW personnel to determine the bearing of any transmitting station within its range.
* IF Freq: 500 kHz (which was known to re-radiate).
* Antenna type: AS 5039
The AN/SRD-501 was initially fitted to the 205 class ships except Assiniboine. (Graphic courtesy Canadian Navy)
AN/SRN-12 Omega Receiver which was used for obtaining a radionavigation fix from the now defunct Omega system which survived until 1997. Accuracy was +/- 2 nm at distances of 8,000 nm. (Image courtesy Canadian Navy)
LC 204 LORAN RECEIVER
INTERNAV LC 204 LORAN 'C' RECEIVER . (Image courtesy Canadian Navy)
AN/URN-20A (V)1 TACTICAL AIR NAVIGATION
AN/URA-20 TACAN is a polar-coordinate type radio air navigation system that provides an aircrew with distance, bearing and identification information. It can simultaneously provide individual distance measuring service for up to 100 interrogating aircraft. (Image courtesy Canadian Navy)
The signal transmission is a priority sequence and is always done in the following order:
1. AZIMUTH , or a corrected magnetic bearing to the beacon, is a continuous output and services an unlimited number of aircraft.
2. IDENTITY of the beacon, which is transmitted in international Morse Code at 37.5 second intervals with a duration of 5.5 seconds. An unlimited number of aircraft can be serviced.
3. DISTANCE to the beacon in nautical miles, which is done on an interrogation basis, and services 100 aircraft maximum, by selecting the closest 100 aircraft. The distance measuring concept used in TACAN equipment is an outgrowth of radar-ranging techniques; i.e., determining distance by measuring the round-trip travel time of pulsed RF energy. The return signal (echo) of the radiated energy depends on the natural reflection of the radio waves. However, TACAN beacon-transponder facilities, located at specific geographic positions, generate artificial replies rather than depending upon natural reflection. The airborne equipment generates timed interrogation pulse pairs that are received by the surface TACAN system and decoded. After a 50 µsec delay, the transponder responds with a reply. The round trip time is then converted to distance from the TACAN facility by the airborne DME.
4. SQUITTER; a filler pulse train, which automatically keeps the Pulse Repetition Frequency Constant by adding pulses to the train as required.
In the X mode of operation, the TACAN set transmits on one of 126 discrete channel frequencies (which are 1 MHz apart) from 962 to 1024 MHz and from 1151 to 1213 MHz. In the Y mode of operation, the set transmits on one of 126 discrete channel frequencies (which are 1 MHz apart) within the range of 1025 to 1150 MHz. The navigation set receiver, operating in the 1025 to 1150 MHz range for both the X and Y modes, is always displaced 63 MHz from the transmitter frequency.
Of the 3,600 pulse pairs-per-second transmitted by the TACAN, 900 pulse pairs (MAIN and AUXILIARY bursts) contain the bearing information; the remaining 2,700 pulse pairs are either random noise pulses, identity pulses, or replies to interrogating aircraft. Once every 30 seconds, the interrogation replies and random noise pulses are interrupted for the transmission of identity pulses. The navigation set has a receiver sensitivity of -92 dBm or better and a nominal peak power output of 3 kilowatts at the transponder cabinet output. Power output may limited to less than peak by directives. Since the bearing and identification signals are delivered spontaneously and not in response to interrogations, an unlimited number of properly equipped aircraft can derive this information from the TACAN set over a line-of-sight (los) range up to 200 nautical miles.
Power Output: 50 watts average; up to 10 KW average peak
440V 60 Hz 3 phase for the antenna
440V 60 Hz for the transmitter.
115V 60 Hz for the Low Voltage Power System, test equipment and blower fans.
Maximum Range : - 200 NM slant range.
Antenna Rotation:- 900 RPM
Pulse Repetition Frequency: 7200 PPS or 3600 PPS
Pulse Spacing: 12 usec
System Delay: 50 usec
Frequency: 962 to 1213 MHz
Klystron Beam Voltage - neg 20 KV
Klystron Bean Current : variable 0 to 100 MA, 50 ma optimum setting
Manufacturer: ITT Avionics Division, Nutley. N.J.
Contract Number: NOOO39-68-C-2558
Manual Reference: BRCN 4429(1)
Vintage: believed to be around 1968
On Canadian ships which were fitted with dome shaped TACAN antenna there were two possibilities for the antenna mounting. 1) It was mounted a pole mast aft of the foremast. 2) In the case of Fraser (shown above), it was fitted atop a lattice tower between the funnels (in 1987). (Photo by Jerry Proc)
AS-1747/URN-20(V) antenna internal view. The antenna and pedestal are enclosed in a glass fiber reinforced plastic protective radome. The antenna central array, spin motor, rotating assembly, and bearing control servo assembly are mounted on a single base in the pedestal assembly. This base is maintained in a horizontal plane by a roll servo system. (Image and copy courtesy Combat Index Home Page)
Physical Dimensions: 54.5" H; 65 inches diameter
Weight: 480 lbs
Operating Temperature -28 C to +95 C
Frequency Range: Transmit: 962 to 1024 MHz
Receive: 1025 to 1150 MHz
Input Impedance: 50 ohms (nominal) VSWR > 2:1 over frequency range
RF Power Rating: 20 kilowatts at 2% duty cycle.
Power Requirement 115 VAC, 60 Hz., 1 phase for convenience outlet. All other power and control voltages are supplied from the amplifier group.
Feed Type: Unbalanced, coaxial cable
Input Connector Type C
Caveat: The cable lengths between the antenna and amplifier group must not exceed 200 feet.
The AN/URN-25 TACAN Transponder Group is a full service transponder, providing TACAN-equipped aircraft with range, bearing, and identification within a 300 nm radius. This navigation aid was fitted to Annapolis 266 and the 280 class ships. It is currently used in the Halifax class patrol frigates. Pictured above is a dual installation with automatic switchover to the standby unit in case the primary unit fails. In between the transponders is the control unit. (Photo and specifications courtesy NavCom Defence Electronics)
* All solid state except for the ceramic triode tubes in the transmitter output stage.
* All band capability X and Y mode. 252 channels available.
* Emergency power levels of 700 and 150 watts available in case of transmitter tube failure
OE273/AS3240 TACAN antenna. Nothing spins in this antenna. All elements are controlled electronically. (Image courtesy Global Security web page)
Major Units: Transponder Group OX-52/URN-25 and the Control-Indicator C-10363/URN-25
Transmitter: Power output: 3,000 watts at end of tube life.
700 watts reduced power mode (selectable)
700 and 150 watts for emergency power level.
Antenna Group: OE-273A(V)/URN / AS3240
Power Input: 115 volts 45 Hz to 450 Hz.
Weight: Transponder - 960 lbs( 436 kg)
Status Control Indicator - 75 lbs (34 kg)
Dimensions : Transponder Cabinet only - 66" H x 26" D x 24" W
Manufacturer: NavCom Defence Electronics. El Monte, California
SAMPLE BLOCK DIAGRAMS OF VARIOUS SYSTEMS
Click to enlarge
AN/SIH-503 Main broadcast system as fitted in the ISL class. (Diagram courtesy Canadian Navy) Frequency Standard System. This 280/AOR class block diagram shows how the signal from the HP 5061A cesium beam standard is applied to the SRC-23 device as a reference. The outputs of the two 1107 frequency standards are then compared to the cesium beam standard and automatically adjusted.
Two 100 kHz signals then leave the SRC-23 and are applied to the input of the distribution amps. Outputs of the distribution amps are then connected to the SB 5091/SRC patch panel for distribution to the various HF, VHF and UHF transceivers throughout the ship. (Diagram courtesy Canadian Navy)
AN/SIC-503 Main Broadcast for a 280 class ship. This pictorial illustrates all of the system components. (Diagram courtesy Canadian Navy) AN/SRC-507 Flight Deck Broadcast System. This was only fitted in ships with helicopters. (Image courtesy Canadian Navy)
R5061/ SRC-507 (2 on each ship)
Battery operated FM receiver enclosed in a helmet.
Frequency Range: 132 - 150.8 MHz
Operates at 139.04 MHZ.
T5054/SRC-507 (2 on each ship)
Battery operated FM transmitter enclosed in a handset.
Can be used. with the fitted antenna or with the AT 1086 whip antenna.
Power output 5 milliwatts.
Frequency Range: 132 - 150.8 MHZ
Normally operates at 139.04 MHz
AT 1086/SRC 22 (one on each ship)
Omni directional whip antenna that may be connected to the T5054 handset. Normally fitted outside just above hangar door.
PP 3221/SRC 22 (one on each ship)
Battery charger for receiver and transmitter batteries. Holds 20 Batteries.
MX5150/SRC-507 (one on each ship)
Handset holder for holding two handsets.
TS 100A TEST SET ( one on each ship)
Used to test the helmet receiver and handset transmitter.
Contributors and Credits:
1) RCN's AOR/TRBL/ISL/265/IRE/MACK Class Equipment Handout. September 1985.
2) Tom Brent <tgb(at)telus.net>
3) TACAN URN-20 info http://tpub.com/content/et/14090/css/14090_39.htm
4) PRC-515 Specs http://www.milspec.ca/radspec/radspec.html#prc515
5) AN/PRC-25 Specs http://hereford.ampr.org/millist/m7.html
5) PRC-25 info http://www.fernblatt.net/prc25legend.html
6) URN-20 Drawing: Combat Index Web pagehttp://www.combatindex.com/hardware/detail/sensor/nav/as-1747.html
7) RCN's NE TECH TQ6B Training Manual
8) NavCom Defence Electronics http://www.navcom.com/navigation_systems.htm . El Monte, California
9) Electronics Material Officer Course http://www.fas.org/man/dod-101/navy/docs/swos/e1/MOD4LES4.html
10) Global Security Web page http://www.globalsecurity.org/military/library/policy/navy/nrtc/14090_ch2.pdf
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