File:2019 08 21 mt-san-bruno 22 (48606296967).jpg
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To the left of this is Tower 9 of 10 (running out Radio Road, from west to east) on <a href="https://en.wikipedia.org/wiki/San_Bruno_Mountain" rel="noreferrer nofollow">San Bruno Mountain</a>, the 1319-foot ridge that isolates San Francisco from the rest of the Peninsula. To the FCC, it is ASR (antenna structure registration) number 1010566. All the lines at the top of this shot feed Tower 9 Details: Structure Coordinates: 37-41-12.3 N 122-26-7.3 W (NAD 83) Structure Address: 700 Radio Rd (san Bruno Mtn T9 #8250) Structure City: Daly City, CA Structure County: San Mateo County Elevation Info Site Elevation: 390.1 meters (1280 ft) Height of Structure: 61.3 meters (201 feet) Overall Height Above Ground: 78.3 meters (257 feet) Overall Height Above Mean Sea Level: 468.4 meters (1537 feet) <a href="https://www.fybush.com/sites/2011/site-110916.html" rel="noreferrer nofollow">Scott Fybush in 2011</a>: "Tower 9 is the original KRON-TV/FM tower, now used by KTSF (RF 27/virtual 26) and by KRZZ 93.3)." It was part of a complex built by KRON, then the NBC TV affiliate on channel 4, in 1949. Perhaps the longest tenant on this tower was <a href="https://en.wikipedia.org/wiki/KTSF" rel="noreferrer nofollow">KTSF/26</a>, which had been broadcasting after the digital transition on channel 27, but <a href="https://fccinfo.com/CMDProEngine.php?sCurrentService=TV&tabSearchType=Appl&sAppIDNumber=25076ff3633cf6a60163470ef5151935" rel="noreferrer nofollow">relinquished that channel in the spectrum auction</a>, and is now, in the great repack, a "guest" of <a href="https://fccinfo.com/CMDProEngine.php?sCurrentService=TV&tabSearchType=Appl&sAppIDNumber=25076ff3633cf6a601633d187b0a0000" rel="noreferrer nofollow">KDTV-DT</a>, virtual channel 14, pre-repack on channel 51, and post-repack on channel 20. It broadcasts from <a href="https://en.wikipedia.org/wiki/Mount_Allison" rel="noreferrer nofollow">Mount Allison</a> in the East Bay. At the top now is the four-bay antenna of KRZZ/93.3 fm, which has radiated from a number of other sites around the Bay. In my time there (starting in 1985), it was on the KOIT/1260 (originally KYA) tower on Candlestick Hill, moved up to San Bruno after that tower was dropped in a storm, and then moved to the East Bay hills while maintaining an auxiliary transmitter on the new KOIT tower, and eventually moving back here. Details: Effective Radiated Power: 6 kW Transmitter Output Power: 5.3 kW Antenna Center HAAT: 415 m (1362 ft.) Antenna Center AMSL: 458 m (1503 ft.) Antenna Center HAG: 72 m (236 ft.) Calculated Site Elevation: 386 m. (1266 ft.) Height Overall*: 79.6 m (261 ft.) Omni-Directional Antenna Antenna Make/Model: Electronics Research Inc. (ERI) MP-4C-HW The lone TV antenna on Tower 9 right now is KMMC-LD Channel 40 ERP: 14 kW R/C AGL: 48 m (157 ft.) Site Elevation: 390.1 m. (1280 ft.) Height Overall*: 78.3 m (257 ft.) Directional Antenna - Antenna Make/Model: ALI ATC-BCC78CW-40 KCNZ/28 also has both a construction permit CP and an application for this tower. Details on the CP: Channel Sharing Guests: KMTP-TV, San Francisco, California KOFY-TV, San Francisco, California KQRM-LP, Petaluma, California Repacking Information: Pre-Repack Channel: 28 Post-Repack Channel: 21 Post-Repack ERP: 12.8 kW Phase: 9 Completion Deadline: 5/1/2020 Site Location: 37-41-12.3 N 122-26-07.3 W (NAD 83) ERP: 12.5 kW Polarization: Circularly polarized Electrical Beam Tilt: 1.0 degree R/C AGL: 59.4 m (195 ft.) R/C AMSL: 449.5 m (1475 ft.) Site Elevation: 390.1 m. (1280 ft.) Height Overall*: 78.3 m (257 ft.) Directional Antenna - Antenna Make/Model: R.F. Systems PEPL5U-CM4 Antenna ID: 1004992 The KCNZ application is for— Site Location: 37-41-12.3 N 122-26-07.3 W (NAD 83) ERP: 15 kW Polarization: Circularly polarized Electrical Beam Tilt: 1.0 degree R/C AGL: 59.4 m (195 ft.) R/C AMSL: 449.5 m (1475 ft.) Emission Mask: Full Service Site Elevation: 390.1 m. (1280 ft.) Height Overall*: 78.3 m (257 ft.) Directional Antenna - Antenna Make/Model: R.F. Systems PEPL5U-CM4 Antenna ID: 1005308 Polarization: Circularly polarized There is also an FM translator: K327GZ(FX)/95.3 for KDOW.1220am. Effective Radiated Power: 0.04 kW Transmitter Output Power: 0.043 kW Antenna Center HAAT: 0 m Antenna Center AMSL: 420 m (1378 ft.) Antenna Center HAG: 30 m (98 ft.) Site Elevation: 390 m. (1280 ft.) Height Overall*: 78 m (256 ft.) Directional: aimed northwest When I <a href="https://www.linuxjournal.com/article/10832" rel="noreferrer nofollow">wrote about it in Linux Journal, back in 2010</a>, with guidance from my last docent on the mountain, <a href="https://www.linkedin.com/in/timpozar/" rel="noreferrer nofollow">Tim Pozar</a>, wireless Internet service was provided to scientists on the Farallon Islands, offshore, from the base of this tower. |
| Date | |
| Source | 2019_08_21_mt-san-bruno_22 |
| Author | Doc Searls |
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This image was originally posted to Flickr by Nfrastructure at https://flickr.com/photos/46167543@N05/48606296967 (archive). It was reviewed on 27 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 17:12, 27 October 2019 | | 5,760 × 3,840 (11.2 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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