Description: |
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Features:
Note:
The transistor is USE . BUT IT FINE
5W FM Transmitter
Features :
This suite is bulk package, need buyers to welding
(relatively difficult welding chip we have welding welding)
without having to worry about, without any test. After
welding can be used in accordance with the specifications
set! Without any other debugging! While all of the materials
for electronic information, buyers need to leave email after
purchase we unified the hair! Or online to send!
This kit includes all the components and circuit boards, but
does not include the power supply, antenna, cable, audio
cable and coaxial cable.
A 7W FM transmitter without any debugging. Need you're a
novice or a veteran, as long as you will welding, you can
100% successful DIY a high-quality FM transmitter
Control panel components: mainly consists of 51 series
microcontroller and a dot matrix LCD display screen and a
keyboard.
Launch plate parts: digital FM radio chip launch sc3355 +
9018 + 2 + 2 + RD15HV sc2053 level 4 high frequency power
amplifier and power regulation components.
Transmitter suite key features:
1, DSP + PLL technology, make the frequency more stable, the
frequency does not change with the environment and produce
frequency drift.
2, no need any adjustment, bring the fun of DIY to
beginners.
3, the frequency can be continuous adjustment within the
specified scope.
4, with microphone input interface, and can through digital
potentiometer to control the volume of the microphone.
5, audio input by digital potentiometer which can adjust the
volume.
6, power can be between 0.1 W and 7 W maximum power
continuous adjustment.
7, the power output network for harmonic suppression is very
good, make the output spectrum is more clean
8, set the frequency and volume of power lost protection,
the next boot does not need to set up again!
Suite main parameters:
1, the input voltage: dc 12 v
About 2, input current 3.0 A
3, the audio signal: the maximum input Vpp is less than 1 v.
4, microphone types: cylinder microphone or microphones!!!!
5, the output power: 0.5 W - 7 W continuous adjustable!
6, the output impedance: 50 Ω
7, working frequency: 76 m - 108 MHZ
Step: 8, frequency of 0.1 MHz
9, the distortion degree: 0.03% ~ 0.1%
A, the board size: fire board: 100 x 60 mm (excluding fin)
Control panel: 58 x 36 mm
B, the launch distance: more than 8 km (premise is open
field emission)
C, stereo separation degree: greater than 63 db
The suite is demanded by beginners special design, basic no
debugging, debugging difficulty is basic for 0. 100% as long
as according to the correct welding operation can be
successful. Whether you are veteran or a rookie, all can
enjoy to spend the least cost FM launch DIY fun! As for
patch welding, we don't have to worry about too much, this
suite USES capacitive resistor strips are 0805
encapsulation, welding board and plug-ins is the same,
Antenna must be used in this transmitter 50 ohms, frequency
of about 100 m antenna, shall not be used conductor, rod
antenna, 2.4 G antennas, radio antennas instead
GP antenna 65-375MHZ
The appearance of the antenna is as shown.
It is a more efficient FM transceiver antenna.
It can also be placed outdoors. It can also be hung in the
air.
Each of the vibrators can be pulled according to
the transmission frequency. It is more flexible than the GP
antenna of the currently available fixed-length vibrator,
making it more effective to resonate with the transceiving
frequency. Achieve higher transceiving efficiency.
The length of the four vibrators is 20 cm to 1.1
m. It is suitable for wider frequency adjustment. The
working frequency can be adjusted from 65 MHz to 375 MHz.
For different transmission and reception
frequencies, the length of each vibrator is (300/frequency)
/ 4 (meters), and the middle one is pulled up. The three
surrounding ones are pulled downward by 45 degrees.
For example, the transmission and reception
frequency is 107.3MHZ. Then each vibrator has to pull:
(300/107.3) / 4 = 0.699 meters,
When you feel that the transmission distance of
your FM transmitter or the sensitivity of the FM receiver is
not satisfactory, connecting this antenna can have an
immediate effect.
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