Navy Radio Antennas

nrl-ant-01.JPG (328948 bytes)
note WR = Wire Rope		     

For more info see NAVSHIPS 0967-177-3020, SHIPBOARD ANTENNA SYSTEMS &  NAVSHIPS 900121(A) SHIPBOARD ANTENNA DETAILS - please let me know if you have a copy I can borrow to scan

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

 

Shore Station Antennas
rhombic-02.JPG (34088 bytes)

rhombic-01.JPG (6176 bytes)
Rhombic

xmtr-sw-01.JPG (81809 bytes)
Switching System		 con-mono-01.JPG (29524 bytes)
Conical Monopole

Performance Evaluation of Conical Monopole -  Dec. 1992 NPS Thesis (download 2.6 MB pdf)

sleeve-01.jpg (20185 bytes)
Sleeve

inc-cone-01.jpg (7385 bytes)
Inverted Cone
log-per-02.jpg (31103 bytes)
Log Periodic

log-per-01.jpg (10984 bytes)
Log Periodic
AN/FRA-109 

fra109-01.JPG (240322 bytes)

 4-30 mc, 600kw PEP transmitting antenna system
steerable beam or omnidirectional

fra109-02.JPG (177954 bytes)

 fra109-03.JPG (49650 bytes) VLF transmitting antenna design
AN/FRD-10

frd10-imp-01.jpg (44451 bytes)

 CDAA Receiving Antenna System

Mainly used for NAVSECGRU DF/Intercept - but several were also used for COMMSTA general service communications

  Click Here for AN/FRD-10 page -
-

Shipboard Antennas


Typical shipboard antenna layout

 3-32.jpg (25399 bytes)
losangeles-05.jpg (58254 bytes)
Bow Discone Antenna
(USS Los Angeles CA-135)		 ant-sleeve-ship-01.JPG (71597 bytes)
Shipboard Sleeve Antennas		 3-34.jpg (14149 bytes)

 

 fan-02.jpg (10555 bytes)
Wire Fan Antenna

NT-66047 5 section, 35'
NT-66046 4 section, 26'
aluminum whip
more info here		 ant-35ft-01.jpg (159105 bytes)
standard shipboard 35 ft. whip antenna
(is this one Navy or commercial?)		 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.

3-33.jpg (25079 bytes)
NT-61335? or NT-61350? or NT-61428?

twin-whip-01.jpg (8618 bytes)
Dual-Whip antenna
AN/SRA-3 VHF whip antenna sra3-01.JPG (314493 bytes)
 cu226-sra3-02.JPG (23358 bytes) 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

   need more photos

manual NAVSHIPS 92299

 sra17b-19.jpg (38751 bytes)
C-2536B/SRA-17 controller		 sra17b-12.jpg (39082 bytes) sra17b-13.jpg (58877 bytes)
sra17b-14.jpg (34544 bytes) sra17b-16.jpg (70210 bytes) Antenna is 129" long
sra17b-15.jpg (31901 bytes) sra17b-17.jpg (29120 bytes)
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  need photo Loran receiving antenna NAVSHIPS 94350

ANTENNA  HARDWARE

ant-wire-01.JPG (58923 bytes)
Shipboard Wire Antenna Installation		 rcv-wire-01.JPG (119085 bytes)
Receiving Antenna Installation Detail		 ant-trunk-02.JPG (87235 bytes)
Antenna Trunk		 ant-trunk-01.JPG (165562 bytes)
Antenna Trunk Detail
ant-11.JPG (46454 bytes)
Shipboard Wire Antenna installation		 ant-12.JPG (96749 bytes)
Shipboard Wire Antenna hardware		 trunk-075.JPG (387159 bytes)
USS North Carolina - cylindrical trunks and insulators

 Wire Antenna & Trunk Hardware
MX-407B/U end seal
       (feed-through insulator)
NT-91836		 mx407b-u.JPG (17792 bytes) about 8.5" long

used to connect RG-18/U coax to antennas.

 -
MX-1460/U end seal
       (feed-through insulator)		 need photo used to connect RG-18/U coax to antennas. -
MX-1461/U end seal
       (feed-through insulator)
NT-92180		 mx1461-u-01.JPG (4960 bytes) about 6" long

used to connect RG-10/U coax to antennas.

 -
NT-24206 Antenna Disconnect Switch cvp24206-switch-01.JPG (18460 bytes)
SPDT, 200 amps @ 7500v
"closed" or "grounded"		 cvp24206-switch-02.JPG (10741 bytes) manuf Powercraft Corp.
CYP-24206
NT-24223 Antenna Disconnect Switch need photo
SPDT, 100 amps @ 2500v
"closed" or "grounded"		 -     -
NT-24270 Antenna Disconnect Switch nt24270-01.JPG (140269 bytes)
SP3T, 200 amps @ 15kv
"ground", "closed", or "open"		 used in 9"x11" antenna trunk -
NT-10658A antenna wire turnbuckle nt-10658A.JPG (74553 bytes) used to feed antenna wire - Fiege connector clamps wire rope manuf CBEP-10658A
NT-61019 outside entrance insulator
(ceramic is NT-61234)		 nt61019-01.JPG (213102 bytes) used to connect antenna lead-in to antenna trunk
?? but drawing above shows 61019 as a  bowl-type feedthrough like photo below??? 		manuf CAL-61019
????? 61019-insul.jpg (19456 bytes) used to feed antenna trunk center conductor through bulkhead?

2.5" tall, mounts in 2.75" hole
5/16-18 threaded conductor

 

 -
NT-61174 pedestal standoff insulator nt61174b.JPG (16780 bytes)   3.3" tall

used to stand off center conductor in antenna trunk

manuf Lapp CBO-61174B
NT-61175 pedestal standoff insulator nt61175a-01.JPG (25064 bytes) used to stand off center conductor in 6"x8" antenna trunk
see trunk drawing above

61175-10.jpg (125348 bytes)

 manuf Lapp CBO-61175A
NT-61180 pedestal standoff insulator nt61180b-01.JPG (29402 bytes) used to stand off center conductor in antenna trunk
see trunk drawing above		 manuf National Porcelain CPP-61180B
NT-61276 antenna base insulator nt61276-01.JPG (249327 bytes) whip antenna base - need more info -
NT-61335 antenna base insulator need photo whip antenna base - need more info
see drawing above		 -
NT-61338 standoff insulator need photo
see drawing above		 used to stand off center conductor in 18"x20" antenna trunk
see trunk drawing above		 -
NT-61339 pedestal standoff insulator nt61339-01.JPG (23760 bytes)
not sure of part number		 used to stand off center conductor in 9"x11" antenna trunk
see trunk drawing above		 -
NT-61350 antenna base insulator need photo
see drawing above		 whip antenna base - need more info
see drawing above		 -
NT-61455  61455-01.jpg (133195 bytes)  purpose?
61455-02.jpg (128341 bytes)		  manuf CMP-61455
NT-61475 outside entrance insulator
(ceramic is NT-61476)		 nt61475-01.JPG (301653 bytes)
used to connect antenna lead-in to antenna trunk - see trunk drawing above		 p1010008.jpg (196484 bytes)
USS Slater - trunk and insulators
Note - red paint indicates transmitting antenna		 manuf CBJ-61475
NT-61479 strain insulator nt-61479.jpg (16321 bytes) about 10" long
used as shown in figure 3-32 above		 manuf CBJ-61479
NT-61481 strain insulator need photo used as shown in figure 3-32 above -
NT-61493 strain insulator need photo used as shown in figure 3-32 above -
NT-61494 strain insulator need photo used as shown in figure 3-32 above -
NT-62111 end seal
       (feed-through insulator)		 62111-01.jpg (147516 bytes)  62111-02.jpg (134053 bytes) -
NT-62119 end seal
       (feed-through insulator)		 62119-01.jpg (115281 bytes)  62119-02.jpg (72514 bytes) -
NT-90835 antenna mount feed-through insulator 90835-insul.jpg (22014 bytes) 5.75" diameter
7/8" x 3.5" antenna mount
9/16" threaded connector		 -
NT-91836 end seal
see MX-407B/U above		 see MX-407B/U above - -
NT-92180 end seal
see MX-1461/U above		 see MX-1461/U above - -

Receiving Antenna Matching Transformers

CU-836/U matching transformer cu836-u-01.jpg (73447 bytes) For receiving antenna use - connecting to feedline or rhombic antennas
2-32 mc
matches 600 or 200 ohms to 70 ohm coax feed

TMC model RAC-32
TMC spec sheet

cu836-u-04.jpg (56285 bytes)

cu836-u-02.jpg (66456 bytes)

cu836-u-03.jpg (52722 bytes)

NT-471138 matching transformer

rw471138-03.JPG (252204 bytes)

 rw471138-11.JPG (109994 bytes)
For receiving antenna use - connecting to feedline or rhombic antennas
3-22 mc
matches 700 or 250 ohms to 70 ohm coax feed

Similar to CU-128B/U except different transformer shielding and mount

 manuf Washington Naval Gun Factory RW-471138

rw471138-16.JPG (100380 bytes)
rw471138-13.JPG (148475 bytes) rw471138-15.JPG (165365 bytes)
coax input terminal 2, ground terminal G 		rw471138-14.JPG (180931 bytes)
250 ohm output terminals 4-7
700 ohm output terminals 3-8

Transmitting Antenna Matching Transformers

TMC TRC-500 -
similar to CU-729/URT (50 ohm, 3500w) & CU-1076/URT (72 ohm, 3500w)

tmc-trc500-01.jpg (20551 bytes)

 500 watt, 72 ohm to 600 ohm
2-30 mc

tmc-trc500-02.jpg (19679 bytes)

 tmc-trc500-03.jpg (22032 bytes) tmc-trc500-04.jpg (20488 bytes)