OK. So we have a signal that is sent to a radiosmitter's antenna. How does that signal get from the antenna to the air?
Let's first take a look at the signal. The signal is an electic current, and every electric current is actually electrons mo...
Would you like to be able to amplify a phone call so everybody can hear it? Or perhaps you'd like a way to record phone calls for record-keeping purposes. If either idea sounds good to you, then you might want to build the FM Telephone Transmitter des...
Discrete components of the design of phase-locked loop transmitter 3 to 3.5 W.
This is the schematic for an FM transmitter with 3 to 3.5 W output power that can be used between 90 and 110 MHz.
The circuit has been tested on a normal RF-tes...
At the core of a small BA1404 FM stereo transmitter
...by Rod Elliott (ESP)
Introduction
I have had a few inquiries about a low power FM transmitter, and this article should satisfy those who might want to build one. It is designed to use an input from another sound source (such as a gui...
CAUTION! This transmitter is illegal in the Netherlands and in many other countries. The creator of this site is not responsible for the consequences of using this channel. He is also not liable for fines or seizure of equipment. The construction o...
Part of the Radio-controlled transmit, transmit frequency of 265MHz, 12V power supply, the remote distance of 100M, operating current is only 4mA.
265MHz UHF frequency transmitter is made up of V1 and external components C1, C2, L1, L2, etc. thr...
Click to enlarge
...Use the NEC Corporation of Japan upc1651 integrated circuit, the high gain circuit, the working stability, thus ensuring high-performance microphone. FM transmitter with its circuit components. The tramsmitter use 40 - 50cm soft drag line for antenna...
