The output power of this long range rf transmitter is around 1w but can be higher if you use transistors like kt920a, blx65, bly81, 2n3553, 2sc1970 or 2sc1971. Here are some diy fm transmitter circuits that we have been published on. How to write a project on the topic fm transmitter 2 km range for five chapter. The 10 km range, 27 mhz transmitter circuit explained here uses citizens band which consists of 2. A fm transmitter can cover maximum distance, here showing a long range fm transmitter circuit diagram that can cover the distance upto 5 km and with the power of 1 w. The audio signal to be transmitted is coupled to the base of q1 through capacitor c2. This is a longrange fm transmitter circuit in the vhf range. This output is fed to the final rf power amplifier q3, the output of which feeds the tuned circuit. The power of this long range fm transmitter circuit is very good. The transistor q1 and q2 forms a classic high sensitive preamplifier stage. Transmitter circuit diagrams in this website but no one.
The circuit of this project is little hard but can be built if we work carefully with it. With the increased activity on 2 metres, some who may have contemplated working this band, have possibly been deterred by the cost of a black box and the uncertainty of modifying commercial equipment. The fm transmitter produces a range of vhf from 88 hz to 108 mhz. Figure 1 the schematic diagram of 2w2 km 88108 mhz frequency vhffm transmitter. A simple wireless fm transmitter circuit uses radio frequency communication to transmit the medium or low power fm signal. This is circuit of 5km long range fm radio transmitter circuit. This circuit requires only one power supply 9v only. Here we are presenting a long range fm transmitter that can cover a reasonable distance of 5 kilometers 3 miles and beyond with a one watt rf power with full circuit details, bill of material and testing procedure. Last updated on july 3, 2019 by swagatam 7 comments. The transmission signal can catch upto a distance of 5 km with stable frequency.
Use a good 12v 1amp minimum stabilized power supply. Here presenting a small powerful circuit of a fm transmitter which operate with 12v dc. The 10 km range, 27 mhz transmitter circuit explained here uses citizens band which consists of 2 main types of users. Use a good heatsink for the t5 transistor as it gets a little hot. Fm transmitter long range with circuit,component list,assembly instruction for 2 km range duration. Long range fm transmitter circuit 9v to 12v can be able to manufacture the range of two kilometers. This is very stable, harmonic free, long range fm transmitter circuit which can be used for.
Several capacitors c 4,8,9,10 are used on the supply rail for hf. The diagram shows the block diagram for fm transmitter circuit. This long range fm radio transmitter has an additional rf power amplifier stage, after the oscillator stage. R1, r3, r4, r6, r5 and r9 are the biasing resistors for the preamplifier stage comprising of q1 and q2. With this situation in mind, the author has, designed a simple, easilybuilt 2m f.
In the case of applications typically do not want a high transmission. This is long range fm transmitter circuit in vhf range. Components required for fm transmitter circuit are modulator, oscillator, rfamplifier, audio preamplifier, microphone and antenna. By this homemade 5 km long range fm radio transmitter project circuit. Long range fm transmitter circuit,2 km 88108 mhz vhf. If used voltage level of the power supply more than 10v. Long range fm transmitter circuit,2w 2 km 88108 mhz frequency vhf. Download 2 km fm transmitter electronic circuits and diagram december 2nd. Sonar with up to 2 watts, when used with a supply voltage of about 24v. With a matching antenna, the fm transmitter circuit shown here can transmit signals up to a range of 2 kilo meters. With yagi antenna, looking like early days of tv antenna with aluminum pipes at both at transmitter and receiver end looking each. This is basically a simple diy hobby circuit and you can try it in your home with minimal components. Use a good 12v1amp minimum stabilized power supply. Long range fm transmitter circuit diagram and schematic at low cost using very simple.