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High-frequency direction finding, usually known by its abbreviation HF/DF or nickname huff-duff, is a type of radio direction finder (RDF) introduced in World War II. High frequency (HF) refers to a radio band that can effectively communicate over long distances; for example, between U-boats and their land-based headquarters.
AN/FLR-9 in Elmendorf, Alaska c. 1964. The AN/FLR-9 is a type of very large circularly disposed antenna array, built at eight locations during the Cold War for HF/DF direction finding of high priority targets.
Initially three U Adcock HF DF stations were set up in 1939 by the General Post Office. With the declaration of war, MI5 and RSS developed this into a larger network. One of the problems with providing coverage of an area the size of the UK was installing sufficient DF stations to cover the entire area to receive skywave signals reflected back ...
AyosDito.ph was an online classified-ads website for Filipinos to buy and sell online, regardless of their location in the Philippines. It was owned and operated by 701Search Pte. Ltd. , which is a joint venture between media giants Singapore Press Holdings and Schibsted .
Maxwell K. Goldstein (January 15, 1908 – February 18, 1980) was a first generation Jewish-American scientist and engineer who was instrumental in the development and deployment of high-frequency direction finding by the United States Navy during the Second World War.
Meralco was established as the Manila Electric Railroad and Light Company in 1903. It was created to provide light and an electric railway system to Manila. During World War II the transportation infrastructure of Meralco was destroyed and instead of rebuilding the railway, the company focused its efforts onto its electric services.
Philippines: Semi-automatic pistol.45 ACP: TAC Ultra FS HC 45 ACP: 3,000 acquired by Armed Forces of the Philippines in 2017, for issue to all service branches. Majority went to the Philippine Army. [101] [102] AFP ordered 60,000 units under AFP 0.45 caliber Hammer Fired Pistol acquisition project, majority expected to go to the Philippine Army ...
An integrated power supply is one that shares a common printed circuit board with its load. An external power supply, AC adapter or power brick, is a power supply located in the load's AC power cord that plugs into a wall outlet; a wall wart is an external supply integrated with the outlet plug itself. These are popular in consumer electronics ...