Description
Demonstrating the noise-free signal received from a 10 Kilowatt AM broadcast transmitter compared to the signals received from a 5 Kilowatt and a 2 Kilowatt transmitter, all located out at Gungahlin, approximately 20 Kilometres away from the AM receiver in Tuggeranong.
The receiver is a 1955 Hotpoint five tube radio with no separate RF amplifier stage, and uses an internal ferrite rod antenna which needs to be orientated (by moving the radio) for maximum signal.
NOTE: ABC AM transmitters in Sydney, Melbourne, Brisbane, and Adelaide, operate on a power of 50 Kilowatts. There are TWO 50 Kilowatt transmitters at each site connected to a common antenna, giving a total of eight 50 Kilowatt AM transmitters in Australia overall. (There is also an ABC News Radio transmitter at each site operating on a lower power of 10 Kilowatts).
The population and area of the Australian Capital Territory is not large enough to warrant the use of a 50 Kilowatt transmitter for the ABC in Canberra, so Radio National Canberra operates on a power of 10 Kilowatts, and its ''sister'' station ABC 666 Canberra transmits on 5 Kilowatts. Both stations share the same antenna at the Gungahlin transmitting site