It also has controls that allow you to use the radio: for example, you can select the channel, adjust the volume, switch between receiving and transmitting, and so on. The antenna, which extends the ...

A crystal radio is basically a high Q resonator tied to an antenna and an envelope detector. These days the envelope detector is a point contact diode such as a 1N34 Germanium diode. The resonant ...

NPR Labs has been testing coverage and signal strength of antennas for the Boston Acoustics Recepter HD radio. Initial results, based on tests using five Washington-Baltimore stations, have been ...

Here is a high performance radio receiver antenna amplifier for the entire VHF broadcast and PMR band (100-175 MHz) which can be successfully built without any special test equipment. The ...

The antennas are designed for embedded LBS receivers requiring good user experience that operate with obstructed view of orbiting satellites. The PTA1.5M improves GNSS receiver sensitivity to offset ...

This inexpensive FM radio receiver antenna booster uses the BF324 TO92 style pnp transistor in a grounded-base configuration. The circuit may be used as a signal booster with VHF receivers whose front ...

Back before cell phones … before video games … before television … even before electric radios, there were crystal radio receivers.

This article discusses the GALANT adaptively steered antenna array and receiver, demonstrating the test scenarios generated with the GNSS simulator. Exemplary results of different static and dynamic ...