Now widely used for wireless microphone VHF (very high frequency) and UHF (ultra high frequency) two transmission bands. VHF band range is 30MHz - 300MHz, a wavelength of 10m - 1m, often referred to as UHF. UHF-band frequency range is 300MHz - 3000MH

Introduction This article should satisfy those who might want to build a low power FM transmitter. It is designed to use an input from another sound source (such as a guitar or microphone), and transmits on the commercial FM band - it is actually qui

Introduction This small FM transmitter includes a limiter, a microphone amplifier and a PLL digital tuning. All the parts are placed on one circuit board. The RF power is switchable between 1 W (HI) and 0,2 W (LO). Technical specifications Supply vo

A very stable BUG. Can be carried and moved while in use. Range: 100 to 200 metres. Frequency: 85MHz to 110MHz - refer to article to set frequency. T his is our first FM transmitter in a series. We will be specialising in showing how to design very

FM Transmission is one of the most interesting branches of electronics. It's an ideal place to start as the circuits are very simple and produce absolutely amazing results. With as few as 20 components, a circuit can be designed totransmit an impress

The PC Board Artwork for The Wasp SENSITIVITY The sensitivity of the WASP depends to a large extent on the value of the load resistor on the electret microphone. We have used 39k in the project, as the microphone we supply is a v

The Wasp components PARTS LIST 1 - 330R (orange-orange-brown) 1 - 470R (yellow-purple-brown) 1 - 22k (red-red-orange) 1 - 39k (orange-white-orange) 1 - 47k (yellow-purple-orange) 1 - 150k (brown-gree

TESTING, ALIGNING and GETTING THE CIRCUIT TO WORK We are going to cover these three at the same time. The first thing to do is see if the transmitter works. This will relieve a lot of your worries. Place it near an FM radio turned to medium volume an