Full-duplex radio communication usually involves transmitters and receivers operating at different frequencies. Simultaneous transmission and reception on the same frequency is the Holy Grail for ...

A) With the P1 we regulate the intensity of sound. B) With the P2 we regulate the frequency of reception. C) Optionally: If you want to check the frequency with your PC it will be supposed you make ...

A simple fm radio transmitter circuit which covers frequencies from 88 to 108 MHz. It is built with 3 transistors: BC109, BFR91A and BFR96S. It is quite stable and the output power is around 200 mW.

A staple of starting off in electronics ion years past was the crystal set radio, an extremely simple AM radio receiver with little more than a tuned circuit and a point contact diode as its ...

Tesla’s Spirit Radio uses a simple crystal radio circuit connected to a computer sound-in jack to generate spooky sounds from all kinds of electromagnetic sources. As you will see, it creeped the hell ...

Last month we looked at radio cabinetry. This month we take a look at one of its examples, a 1929 RCA Radiola 46 in a high boy console. David Sarnoff (*1), a Belarusian born immigrant, led the Radio ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This is the main section of Edwin ...

In writing articles about vintage radio, I try to alternate between the technological and the people who made the technology possible. Occasionally, I just feature an interesting radio and the story ...