Saay teringat jaman dulu, untuk merakit sebuah Pemancar Mini – Radio FM, saya harus menyolder satu persatu komponen ke dalam sebuah PCB, untuk pemasangan komponen nya pun harus teliti dan harus bisa membaca nilai resistor, kaki kaki capasitor, kaki kaki transistor dll. Saat ini untuk merakit sebuah pemancar mini radio FM, tidak harus seribet jam dulu, karena sudah banyak beredar modul modul atau kit pemancar, sehingga kita tinggal rakit, seperti kita ngerakit sebuah PC.

Berikut contoh kit pemancar fm “FSN-30A 0-30W radio broadcast station FM transmitter PCB KITS“, untuk model kit nya seperti di gambar berikut.

FEATURES:

– A Kind Reminder: This is a kit and skilled assembly is required.
– The Kit includes an amplifier board, a control panel board, an interface board and connection cables.
– Power adjustable: 0-30 watts
– LCD displays working frequency, volume, temperature, forward power, reflected power and SWR, Single knob operation.
– Automatic power control maintaining the output at any preset level Provided with SWR protection function and temperature protection, raise alarm prompts once meet any trouble while working.

(1) Control panel board

– It includes FM modulation circuit, user interface circuit, RF drive circuit, fan control circuit, auto power control circuit.
– The RF output of this board is 1 watt.

(2) Amplifier board

– The amplifier circuit includes BLF245 power amplifier circuit, power and SWR measuring circuit, digital temperature detection circuit.

(3) Interface Board

– Dual stereo audio input interface.
– RS232 port (for Program debug, optional).
– AUX interface.
– Signal input level preset potentiometer.

(4) Connection cables

– Connect control board with amplifier board cable.
– Connect control board with interface board cable.
– RF cable: connect control board with the final stage amplifying board.
– Fool-proofing designed by color with IDC interface.

TECHNICAL SPECIFICATIONS：

– Power supply voltage: DC 28V
– Power Output: 0 to 30Watt adjustable (step 1W)
– Frequency range: 87.5-108 MHz
– Frequency Step: 0.1MHZ
– Operating Current: Less than 4A
– Input power: Less than 1 watt
– Harmonic suppression: -65 dBc
– Operating temperature: -10 ℃ ~ 50 ℃
– Frequency stability: ± 10 ppm (-10  ° C to +60 ° C )
– Frequency Response: 50 – 15000Hz
– SNR: More than 50dB
– Distortion: less than 0.5%
– Parasitic amplitude modulation: Less than 0.2%
– Frequency deviation: Less than ±75KHz
– Modulation Mode: WFM
– Transmission Signal: FM Stereo or Mono
– Tuning Design: Stable PLL Technology
– Audio Input Level: -15db Max: -30db
– Stereo Separation: More than 40db
– Output Impedance: 50 ohm
– Amplifier PCB Size: 120mm(L) * 70MM(W) * 8MM(T)

PACKAGE INCLUDES:

– Amplifier board *1
– Control panel board *1
– Interface board *1
– Connection cable *1