Early radio receivers worked on a principle called Tuned Radio frequency (TRF), patented in 1916. They weren’t very easy to use, requiring each stage to be tuned to the same frequency (until ...
New Delhi [India], February 16: The 7th Edition of The Radio Festival (TRF) was held on February 13, 2024, at the India International Centre, New Delhi, in collaboration with the Ministry of ...
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