Friday, October 21, 2011

12 Watt FM Transmitter For broadcash

This project is a project of the past era is still a college year ngoprek 94an who likes electronics. From hanging out in air through an FM transmitter FM transmitter scheme finally 12 W of friends on the water (Juragane Mbako of PWT who like Djarum 76), is quite simple but can be used ngebrik up to tens of KM. Protel schematic drawings complete version 12V/5A voltage requirements. Antennas can use 1 / 2 dipole, ground plane, gamma match, or other cable Belden brand impendans 50 ohm. For cooling the transistors C1971 perforated so that the transistor langung PCB in mounting to the box or cooler. C1971 transistor emitter body is associated with ground

And here's an example after completion:

Antenna gamma match:
Gamma match antenna is an antenna 1 / 2 lamda with additional impedance matching a more flexible arrangement (var capacitors) by sliding through the gamma match / roadnya. This type of antenna I've ever raft (th 1994) and used for an FM transmitter with good results in setting the right impedance. Measurement of stable 1:1 SWR can be small enough. Unfortunately there has been no documentation of that time I plug the antenna vertical picture just drivennya alone in the room as high as 170 cm with Belden RG 58 cable can achieve at least - +5 km (from Wirobrajan Gg. Gatotkoco up around the plaza palace YK) what more if installed outside the home and at an altitude high enough.


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