Sutro Tower is a 977-foot-tall self-supporting steel structure located near the geographical center of the city of San Francisco, California, used for the transmission of signals for television and FM broadcasting. The base of the tower sits at 834 feet above sea level. The tower is shared by eleven television stations, four FM radio stations and several wireless communications systems.
|With the transition to digital-only TV transmissions, many changes were made to the antenna configuration on the tower in 2009. New auxiliary antennas for the UHF digital stations were installed just below the waist of the tower in April, 2009. After all analog transmissions were discontinued on June 12, the new auxiliary antennas were used while a crew removed all of the old antennas used for analog TV, and replaced them with new permanent antennas for digital operation.|
The antenna for VHF station KGO-7 was replaced first, and the station started using the new antenna on July 21. Installation work was completed on the UHF antennas for all of the other stations in mid-October, and they all switched over to their new antennas on October 19 through 21.
We offer a complete photo history of the antenna project below.
In Summer, 2015, a new antenna was added for KEMO-50, transmitting on channel 32, on the northeast mast below the KFSF-66 antenna. It is the white antenna shown in the photo below, taken March 22, 2016.
In 2018, two of the antennas stopped being used when KOFY-20 and KEMO-50 started sharing with KCNZ from San Bruno Mountain.
During 2019 into 2020, several changes will be made to the present antennas on Sutro Tower. In preparation for the Repack channel changes in the Spring of 2020, new antennas will be added and others will be removed. Watch this space for photos showing the changes as they are made to the tower.
This close-up photo identifies the main antenna used by each TV station.
Channel numbers shown are the transmitter channels. The KEMO 32
antenna was not on the tower when this photo was taken. As shown
above, it is mounted on the right mast below the KFSF 34 antenna.
Close up diagram of the top of the tower showing antenna measurements.|
The KFSF and KEMO antennas on mast C are missing from this early diagram.
On the left in the left photo is the southeast mast with the KGO and KBCW antennas
and on the right the west mast with the combined antennas for KTVU, KRON and
KPIX with the KOFY antenna below it. In the right photo is the combined antenna
for KQED, KMTP, KCNS and KCSM at the top with the KFSF antenna below it.
This is another view of the southeast mast with the antennas
for KGO at the top and KBCW below it. The FM antennas are
for KKSF (no longer transmitting from Sutro Tower) and KFOG.
This is a view of the west and northeast masts
showing the two combined antennas.
Photos above by Ken Erickson
Close up shots of the UHF auxiliary antennas.
First photo by Falcon; second photo by Ken Erickson
These are the auxiliary antennas for the FM stations and KGO-TV
on Level 1. The KGO-TV auxiliary antenna is the red one.
Views from near the bottom of the tower taken late afternoon September 1, 2009
Photos by Falcon 77
The transmitter building at the foot of Sutro Tower
Photo by Ken Erickson
The view seen from Level 6 of Sutro Tower
Photo by Don Hackler, October, 2003
Photos of Bobby (bobby94928 on the AVS Forum) on Level 6 of Sutro Tower.
In the first photo you can see the Sunset District and Pacific Ocean behind him.
In the second one you can see the Golden Gate Bridge next to his right arm.
Photos courtesy of Bobby
Sutro Tower, as seen from Twin Peaks on August 27, 2009, with a view of
Mt. Tamalpais, the Marin Headlands and the Golden Gate Bridge in the distance.
The crew was working on the west mast. The northeast mast had not been updated.
On the left, October 16, 2009; on the right, October 24, 2009.
Note that the temporary digital antenna that was used from
November, 1998 until October 12, 2009 has been removed.
Left photo supplied by Bob Hofert; right photo by Ken Erickson.
This is the full view of the tower as
seen from Twin Peaks on March 22, 2016.
Downtown San Francisco, looking directly down Market Street to the Ferry Building
The broadcast towers atop Mt. San Bruno, located five miles south of Sutro Tower.
Five television stations and eight FM stations transmit from Mt. San Bruno.
Oakland and the East Bay hills with Mt. Diablo in the distance.
Two television stations transmit from Mt. Diablo.
A beautiful old view of Sutro Tower at sunset
Photos and text by Larry Kenney unless otherwise indicated.
Sunset photo photographer is unknown.
Antenna configuration diagrams courtesy Sutro Tower, Inc.
Links to other web sites with Sutro Tower information and photos:
Official Sutro Tower Site
Visit our site Broadcasting - Today and Yesterday - where you will find
links to a variety of broadcast related information and interesting sites