Frequency Collection

Nikola Tesla / Nature 1892
He lectures on the subject of alternating high-frequency current to the Societe de Physique and the Societe Internationale des electriciens, at Paris

Advert, Air France, Lockheed Super Constellation aeroplane Date: 1950s

Radio receiver. Built in Riga, Latvia, 1958-1960
Radio Receiver. Built in Riga, Latvia, 1958-1960. Museum of History and Navigation. Riga. Latvia

Ancient radio receiver. Brand Invicta

Radio-receiver with superheterodyne circuit, 4 valves, only AM reception, model G175. 1952. Gelosa, Italy. National Museum of Science and Technology Leonardo Da Vinci. Milan. Italy

How wireless waves guide aeroplanes during bad visibility
Method of directing the pilots of aircraft flying to and from Croydon has been revolutioned by the Marconi directional visual beacon station erected at croydon. WWII

Suggestions for the homes of tomorrow: High frequency cooker
Photograph of a woman demonstrating the cooker of the future, in which the high frequency waves cook right through the food. The invention was a forerunner of the microwave oven, commonly in use today

Protecting Pedestrians
In view of the frequency of aviation crashes, prudent pedestrians (and their dogs) will take steps to safeguard themselves when they venture into the open

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