Many thanks to LCDR Orlando Gallardo for much of this info

Plaque 13Aug1965 NCS PR.jpg (68397 bytes)
August 1965 Plaque - thanks to LCDR Gallardo

NCS San Juan - estab. 1904, Originally in San Geronimo (Puerta de Tierra), then Carolina-Isla Grande
Comm Center moved to Fort Allen in 1970

San Geronimo site also known as "Stop 7-1/2" or "Parada 7-1/2" 1936 - transmitter site moved from Cayey to Isla Grande  1944 - transmitter site moved to Martin Pena & receiver site to Carolina mid-1950's COMMSTA moved from San Geronimo to Isla Grande
pr-1909.jpg (42250 bytes)
Original station 1909?
5-SanGeronimo-1939.jpg (59314 bytes)
view toward San Geronimo ca. 1939 - 
Six-story building is the PANAM Guest house that is mentioned in this article
- thanks to LCDR Gallardo
1-Stop7-1937.jpg (34126 bytes)
Stop 7-1/2, 1937 looking NW - the "RADIO STATION" building is on the left, but the bombproof building did not exist then - it was probably built in WWII - thanks to LCDR Gallardo
1951 article on Stop 7-1/2 history
- thanks to LCDR Gallardo

cayey-101.JPG (295982 bytes)
Cayey Puerto Rico - from 1922 Radio Broadcast magazine thanks to Google

2-Stop7-Antenna-1951.JPG (132172 bytes)
Stop 7-1/2, 1951 - the "RADIO STATION" building shown below is on the left and the bombproof building on the right.- thanks to LCDR Gallardo

4-Stop7-2007.jpg (1558317 bytes)
Stop 7-1/2 2007, looking north
- thanks to LCDR Gallardo

3-Stop7-2003.jpg (60876 bytes)
Stop 7-1/2 2003, looking north
 - bombproof building
- thanks to LCDR Gallardo
Radio Station Building Historical Info and photos showing antenna towers

1950 photo of antenna towers

2006 photos of station buildings

2008 photo after building restoration

2010 photos after building restoration

Isla Grande COMMSTA 
pr-rb-04.jpg (200722 bytes)
AN/FCC-3 TTY multiplexer, 1958
Russ Barber (L) and Tom Head (R)
pr-rb-02.jpg (41696 bytes)
Water tower with UHF antennas, 1958
thanks to Russ Barber
pr-rb-03.jpg (176000 bytes)
Enlisted barracks, 1958
thanks to Russ Barber
pr-bombproof-58.jpg (198702 bytes)
Bombproof building, 1958
thanks to Russ Barber

Fort Allen  - transferred from US Army and est. 1963 as NRS Ft. Allen - became NCS Puerto Rico in 1970
Transmitter Site was at Fort Allen, Receiver site was at Salinas - Comm Center moved to Roosevelt Roads in 1980

Fort Allen Transmitter Site

Info from Pete Premo (ET 1963-65) -  
    We had 15 AN/FRT-22 40KW transmitters driven by Collins OA-2180 twin sideband suppressed carrier exciters. We received up to four channels
of encrypted tty which we combined into two channels with TD-97 multiplexers. The FRT-22's used an FRT-26 as an IPA. Each channel contained up to 16 messages. We ran two mark space tty circuits to Trinidad. The receiver site used R-390A receivers and TD-98 demultiplexers to recover the four channels to send to the Com Center.
  The transmitter and receiver site used four tower rhombic curtain arrays for all the main circuits. Once in a while we would do fleet communication using rotatable log periodics, one of which can be seen in the background of the "Cookie" picture that I sent you. We had two circuits each to Washington DC, Balboa in the Panama Canal Zone, Trinidad, Asmara Ethiopia, Heidelberg Germany and one more that I can't remember.
    The transmitter site had a backup power station that consisted of four 750 KW Diesel driven generators, two of which could power the xmtr site and when we did a test alert the other two would backfeed the rest of the base excluding the comm center which had its own facility. The units ran so smooth that a nickel would stand on edge on the engine base while the unit was running.

ft-allen-frt22-02.JPG (14619 bytes)
AN/FRT-22 transmitter
ft-allen-72.jpg (48644 bytes)
AN/FRT-22 transmitters - thanks to Pete Premo
ft-allen-74.jpg (47999 bytes)
Test Shop - thanks to Pete Premo
ft-allen-75.jpg (62135 bytes)
Mascot "Cookie" - thanks to Pete Premo
  Al Wiemann's Fort Allen Web Site

  October 1970 Flood Article
- thanks to LCDR Gallardo


salinas-barracks.jpg (130037 bytes)
Fort Allen barracks - thanks to Bob Kimes
ft-allen-73.jpg (71966 bytes)
Enlisted Pool - thanks to Pete Premo
ft-allen-71.jpg (63008 bytes)
Admin Building - thanks to Pete Premo

Salinas Receiver Site

RM3 Al Wiemann @ receiver site.jpg (44672 bytes)
Salinas 1966 - RM3 Al Wiemann 
thanks to Al Wiemann
RM3 Clifton Beal with Tulip.jpg (60031 bytes)
Salinas 1966 - RM3 Clifton Beal w/ "Tulip" 
thanks to Al Wiemann
Ft Allen Receiver bldg.jpg (32781 bytes)
1966 - Salinas receiver building - 
thanks to Al Wiemann
p logofta2.jpg (33042 bytes)
Receiver_Site_3.jpg (51312 bytes)
Salinas 1968 - R-390A receivers with CV-157 and CV-116 converters -  thanks to George Langenbrunner
Receiver_Site_2.jpg (55440 bytes)
Salinas 1968 -  thanks to George Langenbrunner
Ralph_Noris_1.jpg (87800 bytes)
Salinas 1968 - Ralph Norris  -  thanks to George Langenbrunner
salinas-crew.jpg (195967 bytes)
Salinas 1968 -  Francis Wood, Rick Lundgren, Art ? - thanks to Bob Kimes
salinas-wagon.jpg (166987 bytes)
Salinas -  station power wagon & Chevy for crew transport - thanks to Bob Kimes
- salinas-ant.jpg (19951 bytes)
Salinas - emergency antenna rigged before a hurricane - thanks to Bob Kimes
salinas-2002.jpg (60667 bytes)
Salinas (2002) - thanks to LCDR Gallardo
salinas-2008.jpg (55354 bytes)
Salinas (2008) - thanks to Bob Kimes

Roosevelt Roads - NCSPR est. 1980, NCTSPR 1991


Picture314.jpg (207636 bytes)
NCTS shared site with AFWTF & TSC
- thanks to Kelly Laur & LCDR Gallardo

date? - thanks to LCDR Gallardo

1999 - thanks to LCDR Gallardo

2000 - thanks to LCDR Gallardo

Carolina receiver site 1944-52 (then moved to Sabana Seca)

The "Caribe Antenna" was later renamed "Spectator"

Carolina, Caribe Antenna sept 14, 1951 VOL. 1  No. 16.JPG (134979 bytes)

Carolina Caribe Antenna 
Sept 14, 1951 VOL. 1 No. 16
- thanks to LCDR Gallardo
 1951 change of command at Carolina
- thanks to LCDR Gallardo

caribe-510405-a.JPG (227175 bytes)


Sabana Seca receiver site NavRadSta (R) 1952-71 (became all NSGA then?)

Established 1952 as Naval Radio Station (R) and (S). Until 1971 Sabana Seca had some GenSer receiving activity as well as NSGA? - any additional info welcome NAvRadSta (R) patch wullen.jpg (12244 bytes)
NSGA Wullenweber
- thanks to LCDR Gallardo

Martin Peña transmitter site - 1944-1963 - Please send e-mail if you have more info, photos, or want to contact Leo Ross

San Juan map 1950s.jpg (29813 bytes)
location of Martin Peña
- thanks to LCDR Gallardo
possible antenna farm sep66.jpg (60411 bytes)
1966 - thanks to LCDR Gallardo
martin-05a.jpg (32933 bytes) martin-01.jpg (312304 bytes)
- thanks to Leo Ross
martin-05c.jpg (41861 bytes)
- thanks to Leo Ross
martin-03c.jpg (35808 bytes)
- thanks to Leo Ross
martin-04a.jpg (58378 bytes)
- thanks to Leo Ross
martin-04b.jpg (98597 bytes)
- thanks to Leo Ross
martin-04c.jpg (73682 bytes)
- thanks to Leo Ross
martin-05b.jpg (92750 bytes)
- thanks to Leo Ross
martin-03b.jpg (73107 bytes)
- thanks to Leo Ross
martin-03a.jpg (85058 bytes)
- thanks to Leo Ross, 1954
Transmitters in use (1954) - TAB,  TBA, TBC, TBK(12), TBL, TBM(4), TCB(2), TCC, TDH(5), TDO, TDQ, TDU, TEF, TEB(2), FRC

Isabela transmitter site - 1960's?-?? - turned over to Collins 1976

1968-70 photos thanks to Gary Gramke

NavRadStaIsabela.jpg (32043 bytes)

Gary Gramke's Isabela web site

isabela-TransmitterDeck-gramke.jpg (56434 bytes)
Gary Gramke - transmitter deck

isabela-WatchSectionlg-gramke.jpg (54092 bytes)
Watch section - Jim Van Horn, Paul Andrews, George Chorvat

isabela-luikart.jpg (43243 bytes)
Randy Luikart - control room

Aguada VLF transmitter site- what dates?

info aguada-01.JPG (199407 bytes)
Helix House
Aguada-Tower.jpg (94495 bytes)
Looking down from the 1205' tower
photo thanks to Gary Gramke

A historic look at NCTS as it prepares to celebrate a century of communications
By Lt. Nichol Shine, NCTS Public Affairs, November 2003
(- thanks to LCDR Gallardo)

As 2003 comes to an end, Naval Computer and Telecommunications Station Puerto Rico will begin celebrating 100 years of service in Puerto Rico. To commemorate the anniversary of the oldest military installation in the Caribbean, this is the story of NCTS. "One thing is sure," said Rear Adm. Alfred Mahan, known as the father of all modern navies, "the Caribbean Sea is the strategic key to the two great oceans, the Atlantic and the Pacific, our own chief maritime frontiers." His sentiment on the importance of the Caribbean region shaped Naval strategy and U.S. foreign policy during the early 1900s and gave birth to the growing need for Naval communications in the Caribbean.

In May 1904, less than five years after the end of the Spanish-American War and the transfer of ownership of Puerto Rico to the United States., Naval Radio Station San Juan was established. The Navy purchased transmitting, receiving and associated ancillary equipment for Key West, Fla., Guantanamo Bay, Cuba; San Juan, P. R. and the Canal Zone for about $58,000, and by late 1905, Puerto Rico was on the air supporting the communications requirements of the ships policing the waters of the Caribbean.

The year 1906 was pivotal for communications and the Caribbean. President Theodore Roosevelt embarked on a 17-day trip, becoming the first president to make an official visit outside the United States, touring Puerto Rico, the Virgin Islands and Panama, emphasizing the relative importance of the Caribbean region. With the opening of the Panama Canal timed coincident to the start of World War One in 1914, the Caribbean became a strategic pivot area in discussions of fleet deployment. The Navy commenced to build the communications infrastructure necessary to support the Caribbean region. Additional communications capabilities were added which included Port Au Prince, Haiti; St. Thomas Virgin Islands; St Croix Virgin Islands, Santo Domingo, Dominican Republic and an additional transmitter at Cayey in Puerto Rico.

In 1916, the pre-war build up hastened the advent of reliable two-way voice communications made possible by a variety of improvements and accelerated the electronic development needed to support the war effort. In 1917, the United States entered the war on the side of the Allies and by 1918, with the war over, huge advances in radio communications were on the verge of going public in the form of radio broadcasts. In 1934, President Franklin Roosevelt visited Puerto Rico and one year later, he created the Puerto Rican Reconstruction Administration as a Great Depression recovery tool. PRRA provided for agricultural development, public works and electrification of the island.

The Navy’s shore communications facilities in the Caribbean region kept pace with the burgeoning field of electronics with modest improvements. Puerto Rico specifically benefited from the infrastructure improvements initiated in 1935. In 1936, Naval Radio Station San Juan relocated its mountain top transmitter in Cayey to a more convenient site in Isla Grande, which was next to the receiver site and communications center in Old San Juan.   In 1941, Rear Adm. Raymond A. Spruance assumed command of the newly-created Tenth Naval District headquartered in San Juan. Also in the 1940s Naval Radio Station San Juan was re-designated Naval Communications Station San Juan to more accurately reflect the changing technology and the mission supported. The transmitter site at Isla Grande was moved to Martin Pena, with the receiver site moving to Carolina.

In the 1940s, Roosevelt Roads was developed as the "Pearl Harbor of the Caribbean," with supporting installations at St. Thomas, Culebra, Antigua, Guantanamo Bay, Trinidad, Jamaica, Bahamas, St. Lucia and British Guiana. Unfortunately, most improvements would not even begin until after the devastation at Pearl Harbor, Dec. 7, 1941. When war did descend on the Caribbean in 1942, the Navy was initially unprepared to adequately counter the German U-boat threat. In 1942 alone, the German U-boats sank 250 ships totaling 1.3 million tons.

The dividing line between the closing days of World War Two and the beginning of the Cold War is hazy at best, but communications advances of the 1950’s are clear; computers, computer code, integrated circuits and the conception of a distributed computer network called Advanced Research Projects Agency, which laid the foundation for the modern day internet all were created at this time. To support growing requirements, Naval Communications Station San Juan was reorganized once again, moving its sensitive receivers to Sabana Seca in 1951 to support intelligence collection. Naval Facility Ramey was established in 1954 to provide a state of the art Sound Surveillance System to monitor the Soviet submarine threat. The importance of the Caribbean region was reaffirmed by President John F. Kennedy’s visit to Puerto Rico in 1961, following the Bay of Pigs. In 1962, the Cuban missile crisis proved projection of naval power in the Caribbean region had never been more important. That same year Navy communications found a new home on the southern coast of Puerto Rico. Fort Allen, a former Army base, was re-designated as U.S. Naval Radio Station Fort Allen in 1963. Also in 1963, the Arecibo Observatory opened as the world’s largest radio telescope.

In the 1970s, Naval Communications Station San Juan was relocated to Fort Allen and re-designated Naval Communications Station Puerto Rico. The communications center remained at Fort Allen throughout the next decade and operation and maintenance of the Navy’s high frequency transmitter site in Isabela, on the northwest coast of Puerto Rico was contracted out to Collins International Service Company in 1976.

Two terrorist attacks in 1979, one in Isabela and one in Sabana Seca resulting in one death, two injuries and minor damage to equipment caused a relocation of Naval Communications Station Puerto Rico to a new, state-of-the-art communications facility at Naval Station Roosevelt Roads. The 1980s marked an incredible period of advances in computers and telecommunications causing the communications mission in Puerto Rico to expand with the growth of the fleet toward a 600-ship Navy, reactivation of the low frequency transmitter in Aguada in 1984 and a corresponding increase in message processing. NCSPR processed more than one million messages in the first eight months of 1989. The Defense Communications System, the pre-cursor to Defense Information Systems Agency, bestowed communications excellence awards on Naval Communications Station Puerto Rico in competitive categories. NCSPR achieved first or second place recognition from 1986 through 1989.

Naval Communications Station Puerto Rico became Naval Computer and Telecommunications Station Puerto Rico in 1991. Greater importance placed on secure, capable and survivable communications required NCTSPR and DISA cooperation to upgrade connectivity in Puerto Rico. The Puerto Rico Area Wideband System, along with many other infrastructure improvements in the 1990s, provided the robust capability required to support the Navy’s Network Centric Warfare mission as the millennium approached.

As its centennial celebration approaches, Naval Computer and Telecommunications Station Puerto Rico is proud to honor the legacy of the communicators, technicians, engineers and craftsman that came before. The station proudly carries the rich tradition of 100 years of communications excellence in the Caribbean and into the future.

November 2004 - Disestablishment of NAVCOMMTELSTA Puerto Rico