Showing posts with label Pemancar. Show all posts
Showing posts with label Pemancar. Show all posts

Monday, 9 July 2012

Rangkaian Power Amplifier Pemancar FM 4-20 Watt

Rangkaian Power Amplifier Pemancar FM ini sangat sederhana, namun kualitasnya cukup memuaskan.

A very simple fm power amplifier which can deliver 4W rf power with 12V power supply and BLY87A or KT920A and 20W with BLY89A or KT925B.
If you use BLY87A or KT920A the input power must be 0.5W and 4W if you use BLY89A or KT925B. This fm power amplifier is designed to work on 50 Ω antennas and a maximum power supply of 14V and in 88 108 MHz band.
Use only metallic trimmers, a good heatsink for the transistor and ceramic capacitors and keep the pins very short.
FM power amplifier circuit components:
C1 = C8 = 10-40pF + 22pF in parallel ||
C2 = 10-70pF + 120pF ||
C3 = 2.2nF
C4 = 33nF
C5 = 4 x 180pF
C6 = 1nF
C7 = 2.2nF
C9 = 10-70pF + 47pF ||
R1 = 380Ω
R2 = 47Ω
R3 = 5.6 Ω
L1 = 3 turns / 0.8mm / 6mm / legth = 8mm
L2 = 6turns / 0.5mm /over R2
L3 = 5 t / 0.6mm / 6mm
L4 = 4 t / 1.2mm / 8mm
T = 4W with BLY87A, KT920A
T = 20W with BLY89A, KT925B

FM amplifier circuit schematic

 Source: http://electroschematics.com

Wednesday, 28 March 2012

2 Watt FM Transmitter

The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up and amplified by the electret microphone is fed into the audio amplifier stage built around the first transistor. Output from the collector is fed into the base of the second transistor where it modulates the resonant frequency of the tank circuit (L1 coil and the trimcap) by varying the junction capacitance of the transistor. Junction capacitance is a function of the potential difference applied to the base of the transistor T2. The tank circuit is connected in a Hartley oscillator circuit.

Stereo FM Transmitter Based BH1417 Chips

This electronic circuit is a latest BH1417 FM Transmitter design from RHOM that includes a lot of features in one small package. It comes with pre-emphasis, limiter so that the music can be transmitted at the same audio level, stereo encoder for stereo transmission, low pass filter that blocks any audio signals above 15KHz to prevent any RF interference, PLL circuit that provides rock solid frequency transmission (no more frequency drift), FM oscillator and RF output buffer.

Monday, 26 March 2012

FM Transmitter (Pemancar FM)






Mini FM Radio Transmitter (Rangkaian Pemancar FM Mini)

This is an mini fm Radio transmitter circuit. The supply voltage is between 1.1 – 3 Volts with power consumption is 1.8 mA at 1.5 Volts. This circuit should be able to cover 30 meters of range max. at 1.5 Volts.

mini FM transmitterSkema rangkaian mini FM transmitter

Rangkaian Pemancar Fm 88-108Mhz IC-MAX2606

This is a FM transmitter circuit using Maxim semiconductors IC MAX2606. In the circuit the nominal frequency is set to 100 Mhz by inductor L1, (390nH) . The left and right channel audio signals from your source are added by R3 and R4, and attenuated by the POT R2. R2 can be used as a volume control .POT R1 can be used to select a channel of transmission between 88Mhz and 108Mhz.Use 80 cm long wire as the antena.

Pemancar Fm 88-108MhzSkema Rangkaian Pemancar Fm 88-108Mhz

Sunday, 25 March 2012

200mW FM Transmitter (Pemancar FM 200mW)

Here is the latest and greatly improved TX200 VFO/VCO FM transmitter. The most versatile transmitter to date that can be turned into high fidelity stereo PLL based 200mW FM transmitter. It is a perfect circuit for transmitting your music around the house and yard. TX200 uses only two coils; one in the oscillator and the other one in the 200mW VHF amplifier so it should be fairly easy for anyone to build. It also includes built-in pre-emphasis and C5

Pemancar FM dengan IC UPC1651

fm-transmitter-using-upc1651Here is the circuit diagram of an FM transmitter using the IC UPC1651. UPC1651 is a wide band UHF Silicon MMIC amplifier. The IC has a broad frequency response to 1200MHz and power gain up to 19dB.The IC can be operated from 5V DC.
The audio signals picked by the microphone are fed to the input pin (pin2) of the IC via capacitor C1. C1 acts as a noise filter. The modulated FM signal will be available at the output pin (pin4) of the IC. Inductor L1 and capacitor C3 forms the necessary LC circuit for creating the oscillations. Frequency of the transmitter can be varied by adjusting the capacitor C3.

Saturday, 24 March 2012

Rangkaian Microphone/Mic FM Wireless

Microphone/Mic FM  Wireless
Skema Rangkaian Microphone/Mic FM Wireless
Microphone/Mic FM Wireless is basically an FM transmitter to low power. FM Wireless Mic circuit you can use it to replace the wireless mic is usually quite expensive price. If you are a fan of electronics, then the series is worth your trying, but its component prices cheaper tool is also very useful. Here is a picture of his series:

Friday, 23 March 2012

Long range fm transmitter circuit diagram

Long range fm transmitter circuit diagram
This is very stable, harmonic free, long range fm transmitter circuit which can be used for fm frequencies between 88 and 108 MHz. This can cover 5km range (long distance). It has a very stable oscillator because you use LM7809 stabilizer which is a 9V stabilized power supply for T1 transistor and for frequency adjustment that can be achieved by using the 10K linear potentiometer.

1 Watt Four Stage FM Transmitter

This FM transmitter circuit uses four radio frequency stages: a VHF oscillator built around transistor BF494 (T1), a preamplifier built around transistor BF200 (T2), a driver built around transistor 2N2219 (T3) and a power amplifier built around transistor 2N3866 (T4).

FM Transmitter circuit diagram

A condenser microphone is connected at the input of the oscillator. Working of the 1 Watt transmitter circuit is simple. When you speak near the microphone, frequency-modulated signals are obtained at the collector of oscillator transistor T1.

3 Volt FM Transmitter

Rangkaian 3V FM Transmitter
Skema Rangkaian 3V FM Transmitter
This 3V FM transmitter is about the simplest and most basic transmitter to build and have a useful transmitting range. It is surprisingly powerful despite its small component count and 3V operating voltage. It will easily penetrate over three floors of an apartment building and go over 300 meters in the open air.

The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up andamplified by the

Wednesday, 21 March 2012

Rangkaian Pemancar TV Sederhana

 Pemancar TV
Skema Rangkaian Pemancar TV Sederhana
This Transmitter Circuit TV uses standard 1 FM modulation for sound and PAL for video modulation. Audio signal will be modulated is pre-amplified using the transistor Q1 and associated components. The transistor Q2 has two jobs: production of carrier frequency and modulation. The pre-amplified audio signal is fed to the base of transistor Q2 for modulation. Capacitor C5 and inductor L1 forms the tank circuit which is responsible for producing the