Shipboard Communication Antenna Systems

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For more info see NAVSHIPS 0967-177-3020, SHIPBOARD ANTENNA SYSTEMS NAVSHIPS 900121(A) SHIPBOARD ANTENNA DETAILS Shipboard Antenna Details NAVSHIPS 900121(A) Chapter 2 Installation Methods (change 1) - download pdf Chapter 3 Multicouplers - download pdf Chapter 6 Antenna Systems - download pdf Chapter 8 Installation Bibliography - download pdf Antenna Catalog Vol III, Ship Antennas (1960) - download 10 MB pdf Need more info!! - see also antenna section of Shipboard Equipment Manual Also see antennas listed here under "Communications" Also see book "Shipboard Antennas" by Preston E. Law - link note WR = Wire Rope
Shipboard antenna modeling uses brass models in a lead "sea". Receiver probes are inserted from a room underneath the model while test signals are transmitted from the gantry. The model is 1/48 scale and the frequencies used are 48 times higher than actual. Range info Model building info Excellent magazine article Popular Mechanics April 1959			Antenna detail on CG-10 model
		Antenna detail on CG-10 model	Antenna detail on CG-10 model
Typical shipboard antenna layout
MULTICOUPLER. SYSTEM ON THE DL-2 (1952) The multicoupling system to be installed on a new vessel, the Destroyer Leader DL-2 is shown in Figure 3- 30. The communications system on this ship uses a minimum number of antennas and is designed for maximum flexibility. There are six antennas used with the multicoupling system: two 35 -foot whips and one wire antenna for receiving, and two 35-foot whips and one flat -top antenna for transmitting. The receiving antennas are located forward and the transmitting antennas are located aft so as to provide the best possible isolation between the two types. Provision is made to use any equipment with any of the antennas (except the flat -top) in the event of failure or damage to certain portions of the ship. This ship uses three AN/SRA-9 receiving filter assemblies. Two located at the central Receiving Distribution Unit and one at the Auxiliary Distribution Unit. Three transmitting filter assemblies are located at the Central Transmitting Distribution Unit. One of the filter assemblies, F-159/SRT has a crossover frequency of 375 kc with switching provisions for shifting the crossover frequency to 425 kc; another filter assembly, F-160/SRT has a crossover frequency of 1750 kc; the third filter assembly, F-161/SRT, has a crossover frequency of 3250 kc with provisions for shifting the crossover frequency to 3750 kc. The three transmitting filter assemblies are stack-mounted. A four-pole, three-gang, Filter Selector Switch is mounted on the rear of the cabinets. The purpose of this switch is to allow both transmitters to be connected to any one of the three filter assemblies or to allow one of the transmitters to be connected directly to the antenna. This permits more versatile use of the transmitting equipments . 'The UHF multicoupling system for the DL-2 is not included in this discussion.
Bow Discone Antenna (USS Los Angeles CA-135) Discage Antenna (USS Wright CC-2)	Shipboard Sleeve Antennas	Shipboard Conical Monopole	See wire antenna hardware Shipboard Wire Antennas Wire Fan Antenna
NT-66047 5 section, 35' NT-66046 4 section, 28' non-telescoping aluminum whip more info here	NT-66053 is a general purpose 25' non-telescoping whip antenna weighing 30 lbs. It consists of three sections of stainless steel tubing which screw together. In shipboard installations, the whip mounts on Base Insulator NT-61428. In submarines Insulator Type NT-61664B is used. Feed through insulator is NT-61335 or NT-61350 (IL-18/U or IL-19/U) (NL222B31-203 or NL222B32-240)	NT-66047 was replaced by a 2-section 35' fiberglass whip AS-2537/SR AS-2537/SR fiberglass 35 ft. whip antenna	Dual-Whip antenna
AS-2537A/SR 35' fiberglass whip	AS-2537A/SR 35' fiberglass whip	AS-2537A/SR 35' fiberglass whip	AS-2537A/SR 35' fiberglass whip
AN/SRA-3 VHF whip antenna			whip 20-40 mc NAVSHIPS 91292
AN/SRA-17 LF/VLF antenna group Components - C-2536B/SRA-17 controller TN-344A/SRA-17A tuner or TN-418/SRA-17C tuner AT-924B/SR antenna or AS-2687/SRA-17D antenna need more photos manual NAVSHIPS 92299	C-2536B/SRA-17 controller		AT-924/SR Antenna is 129" long TN-334 or TN-418 tuner

AS-2687/SRA-17D Antenna 130.25" overall
The AT-924/SR antenna is an integral part of the TN-334A/ SRA-17C RF tuner. The antenna, tuner, and antenna control unit C-2536/SRA-17 comprise Antenna Coupler Group AN/SRA-17B. Antenna Coupler Group AN/SRA-17C is comprised of AT-924B/SR antenna, TN-418/SRA-17C RF tuner and C-6193/SRA-17 antenna control unit. The AT-924A/SR and AT-924B/SR have equal overall dimensions and are mounted on the same type of base insulator. The configuration and mounting dimensions differ between the TN-334A/SRA-17 and TN-418/SRA-17. Both tuners may be remotely controlled by their respective control units. The antenna coupler groups are physically small but efficient receiving antenna systems for use on small craft where long wires are not available or on ships where large, closely spaced antennas would interact. These antenna groups are designed for use with any receiving equipment tunable over the VLF/LF frequency spectrum.

AN/SRA-28 Loran receiving antenna	need photo	Loran receiving antenna	NAVSHIPS 94350
AN/SRA-43 HF Receiving antenna	need photo	2-8 mc receiving antenna and preselector AS-1857/SRA-43 Whip (5') TN-438/SRA-43 Tuner C-6828/SRA-43 Control	0967-269-4010