This FM transmitter circuit uses four radio frequency stages: a VHF oscillator built around transistor BF494 (T1), a preamplifier built around transistor BF200 (T2), a driver built around transistor ...

At least once every year we take a look at new features in transmitters. LPFM is in our industry news quite a bit as of late, so we’ll look at some equipment that could be used for LPFM as well: small ...

In a continuing series, Radio magazine is interviewing authors of the recently published 11th edition of the NAB Engineering handbook about their particular chapters. Jeff Welton contributed to ...

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.

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When building a radio transmitter, unless it’s a very small one indeed, there’s a need for an amplifier before the antenna.

With the BBC anxious to cut costs and reduce its CO2 emissions, a long-term project has been set up between the BBC and Arqiva (the transmission providers) to improve energy efficiency of the ...

Judging by Apple’s silhouette advertisements, you’d think the iPod was tethered only to slim youths devoted to dance. Not so. The world’s most popular go-anywhere music player is increasingly going ...