Author Archive

Emergency Radio

Emergency Radio

Emergency Crystal Radio

Crystal radio requires no power supply to operate because it uses energy from the signals it receives. Performance is – like one should expect – poor. Nevertheless, with a good antenna and proper ground, it shouldn’t be too difficult to tune to a strong AM station. Read more…

iTrip FM Transmitter

iTrip FM Transmitter

iTrip FM Transmitter Review

The iTrip FM transmitter for the iPod can play your music through any FM radio in your car, at a party, wherever the mood strikes you–and you have a radio. It’s clear that the iTrip is made specifically for the iPod. This gives iTrip advantages over similar devices. For example, with the iTrip, you can have the cleanest possible signal–because you can choose any radio station on the dial to tune for the best performance possible. You do this by ‘playing’ special station codes directly from the iPod itself. Read more…

Radio Transmitter

LCD FM Transmitter

Radio Transmitter for FM Broadcast

Here’s easy to build high-quality PLL Radio Transmitter for FM broadcast, with typical output power of 5 W and no-tune design. The transmitter includes RDS/SCA input and Audio/MPX input with optional preemphasis. It can be used with or without stereo encoder. Tuning over the FM band is provided by two buttons that control dual-speed PLL. The transmitter can work also without the LCD display. Read more…

VHF Radio

VHF Radio Transmitter

VHF Radio FM Transmitter Circuit

Here’s a VHF Radio FM transmitter. This project is a simple VHF FM transmitter using only one crystal and will cover 145.00 to 146.00 MHz. The crystal is a 44.9333 MHz crystal for 145.500 receive, as used in the Trio (Kenwood) 2200, PYE, Motorolla, Tait equipment, to name but four. The frequency of the crystal is not critical as almost any other xtal for the 2-meter band will function. Read more…

RF Wireless

RF Wireless FM

RF Wireless FM Transmitter

Here’s a rf wireless FM transmitter can be built with simple, affordable and widely available parts. Construction is fun and much can be learned although performance is modest; for example, your voice gets difficult to hear at distances greater than 25 feet. Read more…

FM antenna

Dipole FM Antenna

How to Build a Dipole FM antenna

The antenna rod is made of 6 mm copper tube I found in a shop for cars. It is actually tubes for the breaks, but the tube works great as antenna rods. You can use all kinds of tubes or wire. The benefit of using a tube, is that it is strong and the wider tube diameter you use, the wider frequency range (bandwidth) you will also get. I have noticed that the transmitter gives highest output power around 104-108 MHz so I set my transmitter to 106 MHz. Read more…

FM Transmitter MP3

BA1404 FM Transmitter

FM Transmitter for MP3 Player

Do you have an idea to create your own radio station, transmit the music around the house, or simply create a wireless link between your iPod and a receiver in your car, this transmitter will let you do these things easily. With BA1404 HI-FI Stereo transmitter you will be able to transmit MP3 music from your iPod, computer, discman, walkman, and many other audio sources. Read more…