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Energy

(September 21–25, 2005)

Keith Wilson

Always On

John Wilson

Crystal Palace Transmitter

London, England, UK

11.33 UTC 24 September 2005

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© 2005 John Wilson, All Rights Reserved.

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Caption
Over 4 million Joules (4 megawatt seconds) of energy is radiated every second from this transmitter tower in South London .. enough to power 40,000 100 W light bulbs .. and that's just from the UHF TV antennas.

The transmitter tower, which stands 222 m (728 ft) tall, was constructed in 1950 to provide a 405-line VHF TV service to London and the surrounding areas. The transmitter radiated 200 kW on channel 1V (vision 45.00 MHz/sound 41.50 MHz) and the tower was the tallest structure in London until the construction of Canary Wharf at 1 Canada Square in 1991.

Today, the tower broadcasts 625-line UHF TV, VHF FM radio, DAB (Digital Audio Broadcast) and DDT (Digital Terrestrial Television) signals in addition to providing transceiver sites for GSM, UMTS and TETRA mobile radio services and private business radio communications. The site also hosts three MF AM broadcast transmitters and a VHF amateur radio repeater, GB3SL (145.65 MHz).

The following radio and TV services are broadcast from Crystal Palace:

VHF FM Radio

BBC London (94.9 MHz) 4 kW, BBC Radio 1 (98.5 MHz) 4 kW, BBC Radio 2 (88.8 MHz) 4 kW, BBC Radio 3 (91.0 MHz) 4 kW, BBC Radio 4 (93.2 MHz) 4 kW, Choice FM (96.9 MHz) 30 W, Classic FM (100.6 MHz) 2 kW, Virgin Radio (105.8 MHz) 3.73 kW, XFM (104.9 MHz) 2.9 kW

MF AM Radio

BBC Radio 4 (720 kHz) 750 W, Kismat Radio (1035 kHz) 1 kW, Spectrum Radio (558 kHz) 1 kW

UHF TV

BBC 1 (Ch 26) 1 MW, BBC 2 (Ch 33) 1 MW, ITV (Ch 23) 1 MW, Channel 4 (Ch 30) 1 MW

DTT

Mux 1 BBC (Ch 25) 20 kW, Mux 2 ITV/C4 (Ch 22) 20 kW, Mux A SDN (Ch 32) 20 kW, Mux B BBC (Ch 28) 20 kW, Mux C Crown Castle (Ch 34) 20 kW, Mux D Crown Castle (Ch 29) 20 kW

DAB

BBC Block 12B (225.648 MHz) 10 kW, Digital1 Block 11D (222.06 MHz) 6.45 kW, Switch London Block 12A (223.93 MHz) 2.1 kW
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