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Pye PTC122 Walkiephone VHF Portable Radiotelephone
Pye PTC122 Walkiephone VHF Portable Radiotelephone
1951
1951
Pye PTC122 Walkiephone VHF portable radiotelephone was designed in the early 1950s as a lightweight, short range communications device for London police.
Pye PTC122 Walkiephone VHF portable radiotelephone was designed in the early 1950s as a lightweight, short range communications device for London police.
It was the first portable two-way radio to ascend Mount Everest, in 1953
It was the first portable two-way radio to ascend Mount Everest, in 1953
The equipment was a 6-valve crystal controlled transmitter and receiver, carried on the chest of the operator. A built-in top mounted microphone was used, together with external headphones and a flexible tape antenna.
The equipment was a 6-valve crystal controlled transmitter and receiver, carried on the chest of the operator. A built-in top mounted microphone was used, together with external headphones and a flexible tape antenna.
Transmitter power output 0.1 Watt.
Transmitter power output 0.1 Watt.
Pye TRP-X1 Walkiephone HF Portable Radiotelephone
Pye TRP-X1 Walkiephone HF Portable Radiotelephone
1953
1953
Pye TRP-X1 Walkiephone HF portable radiotelephone
Pye TRP-X1 Walkiephone HF portable radiotelephone
A low frequency, longer range version of the Walkiephone, which features a tuneable receiver and a 3-channel crystal controlled transmitter.
A low frequency, longer range version of the Walkiephone, which features a tuneable receiver and a 3-channel crystal controlled transmitter.
This version found much use in the Australian outback, used by rural fire brigades in the 1950s.
This version found much use in the Australian outback, used by rural fire brigades in the 1950s.
A matching HF mobile, the TRM-6, was also produced in Australia, which gave 5-7 Watts RF output.
A matching HF mobile, the TRM-6, was also produced in Australia, which gave 5-7 Watts RF output.
Pye PTC1003 Transhailer
Pye PTC1003 Transhailer
1955
1955
Pye PTC1003 Transhailer
Pye PTC1003 Transhailer
This audio loudhailer was an early application of the first power transistors produced by Pye Newmarket Transistors.
This audio loudhailer was an early application of the first power transistors produced by Pye Newmarket Transistors.
It found widespread application for civil outdoor events and also by the military.
It found widespread application for civil outdoor events and also by the military.
Examples are still found in use today, some 65 years later.
Examples are still found in use today, some 65 years later.
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