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Ahmet UZUN

TV Transmitter (TV Verici devresi) - 0 views

  • If you are interested to build TV transmitter for your electronic project this Advanced TV Transmitter With Sound designed by Tetsuo Kogawa could be good idea for you. TV transmitter consists of of the two sections: video transmitter and audio amplifying. Both of them actually is transmitters. The main one generates video carrier while the smaller one generates the exact 4.5 (5.5 in some countries) MHz FM audio carrier. When it is supplied to the main section, the combination generates the audio carrier that is the total of the video frequency plus 4.5 MHz (this is the same in the US but different in other countries: 3.5 in the UK, 5.0 in Italy, 5.5 in Australia and so on: see the channel plans). The Audio section (1)Coil: The most difficult point is the coil. You can use any type of coil as long as it fits the inductance. But the size of coil for 4.5 MHz is quite large if you use usual type of coils. Here I will use Ferrite Troidal core that is made by Amidon Associates. Wind 0.2 ECW (enamel-coated wire) around the "FT-50-43" (Amidon) in 24 turns. (2)Transistor: You can use popular ones such as 2SC2001, 2SC1815, 2SC1907, etc. But you must keep the pins (E, C, B). How to adjust: Connecting the prove of the frequency counter at "#to the audio-in". Then adjust "Trimer cap. (80PF)" as the frequency counter shows exactly 4.5MHz. Sometimes, you have to add some capacitors (depending 100-1000PF) at the "E(mitter)" position of the transistor in order to adjust the frequency.
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    "TV Transmitter (TV Verici devresi) "
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    TV Transmitter (TV Verici devresi)
Ahmet UZUN

1W FM Transmitter Circuit Diagram - 0 views

  • Components values: T1 = T2 = T3 = BF199 T4 = 2N4427, BLX65, 2N3866, 2N3553 L1 = rf choke (20 turns, 0.2mm on ferrite core, 0.3mm) L2 = 4 t, 0.7mm, 4mm L3 = 6 t, 0.8mm, 6mm, at first turn from T3 L4 = 10 t, 0.2mm over ferrite core L5 = 7 t, 0.8mm, 6mm L6 = 4 t, 1mm, 8mm, 10mm long This 1 watt fm transmitter has been tested and is working as mentioned in this article. If you use replacement components the performances can vary a lot.
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    1W FM Transmitter Circuit Diagram
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    1W FM Transmitter Circuit Diagram
Ahmet UZUN

200mW FM Transmitter devresi - 0 views

  • 200mW FM Transmitter devresi 9 ile 15 volt arası çalışabilen bir devre olup oldukça basittir..
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    200mW FM Transmitter devresi
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    200mW FM Transmitter devresi
Ahmet UZUN

Video Transmitter (Modülatör devresi) - 0 views

  • Video Transmitter (Modülatör devresi)
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    Video Transmitter (Modülatör devresi)
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    Video Transmitter (Modülatör devresi)
Ahmet UZUN

BF199 Sürücülü BLY87 Çıkışa sahip FM Verici Devresi 15 Waat FM Transmitter Sc... - 0 views

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    BF199 Sürücülü BLY87 Çıkışa sahip FM Verici Devresi 15 Waat FM Transmitter Schematic
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    BF199 Sürücülü BLY87 Çıkışa sahip FM Verici Devresi 15 Waat FM Transmitter Schematic
Ahmet UZUN

Crystal quartz oscillator circuit - 0 views

  • Crystal quartz oscillator circuit Another great quartz crystal oscillator schematic with bb139, a 2-nd harmonic quartz crystal and one BF214 transistor. So, the Q quartz is half of the desired transmitter frequency, L1 has 24 turns, 0.08mm Ø built on a 455kHz carcase. L2 has 8-9 turns / 0.8mm Ø / 5mm Ø. This quartz oscillator circuit has a great frequency stability, I’ve build it. Crystal quartz circuit components R1 = 10K R2 = 100
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    "Another great quartz crystal oscillator schematic with bb139, a 2-nd harmonic quartz crystal and one BF214 transistor. So, the Q quartz is half of the desired transmitter frequency, L1 has 24 turns, 0.08mm Ø built on a 455kHz carcase. L2 has 8-9 turns / 0.8mm Ø / 5mm Ø. This quartz oscillator circuit has a great frequency stability, I've build it. Crystal quartz circuit components R1 = 10K R2 = 100K R3 = 8.2K R4 = R6 = 820 R5 = 15K C1 = 330nF C2 = 1nF C3 = 1.5pF C4 = 15pF C5 = 2.2nF C6 = 6 - 25pF trimmer C7 = 4.7pF D1 = BB139 D2 = 5.6v zenner diode T = BF214 Q = half frequency quartz crystal Crystal quartz oscillator circuit schematic "
Ahmet UZUN

RF amplifier with BLY90 - 0 views

  • project of circuit potency lineal RF amplifier with BLY90 for Fm transmitter or vhf transmitter Circuit for lineal amplifier for VHF with power source and printed circuit board, using the transistor Bly90 It is to be used as amplifier of potency of RF in the high strip of of the power source that should be capable to supply a tension of 13 volts with a current of 10 amperes. it demands right care in the assembly of the source. Terrified armored transformer, and three shocks of RF to filter the components of high frequency. XRF1 and XRF2 are 30 you turns of wire 25 AWG in a nucleus of ferrite of 1 cm of diameter and 5 cm length. It can use one of a source at/atx bad, it is easier. XRF3 are 100 you turns of wire 25 AWG in a ferrite nucleus and 1cm of diameter for 5cm of length. Or use an usually found in the exits of sources ATX’s. something around 100µH. The capacitors C1, C2, C3, C4 should be ceramic of 600 V or more and the capacitors of 10nF are for 100v. RX cannot be of wire. Power supply circuit for the rf lineal amplifier Orijinal görüntüsünü görmek için buraya tıklayın. 512x223 px. About the transistor BLY90 The Transistor BLY90 was developed to work in the classes THE, B and C, with 12.5V current of 8A. For applications above 175MHZ. Below we have the diagram circuit of the amplifier using an only transistor BLY90. All capacitors should be ceramic. The resistor of 10Ω for 1 w should not be of wire, the entrance impedance and exit is of 50Ω , soon it should be linked with cable of 50Ω . It should be observed the legal restrictions as the operation of that equipment type. Diagram circuit of the project for the rf lineal amplifier Orijinal görüntüsünü görmek için buraya tıklayın. 522x297 px. Printed circuit board for the lineal amplifier with bly90 Below we have the drawing of the printed circuit board of the transmitter, observe that the components are mounted beside the copper and with the terminals the shortest possible, use heatsink in BLY90. lists of material for assembly of the lineal RF potency amplifier Power Supply RX = 22KΩ 1W C1,C2,C3,C4 = 100nF 600V Ceramic C5,C6,C7,C8, =10NF 100V C9 = 100NF C10 = 4700µF C11 = 2200µF D1,D2,D3,D4 = 1N5401 or equivalent. XRF1,XRF2 = 30 turns of wire 25 AWG in nucleus of ferrite of 1cm diameter for 5 length. Optional, use a shock of RF of a computer source, those of the entrance of the net. XRF3 = 100 turns of wire 25 AWG in a nucleus of ferrite of 1 x 5. T1 = Transformer of 12 Volts for 10 Ámperes with screening. Several = box, plugs, cables, etc. Amplifier of RF Q = BLY90 R = 10Ω 2W C1 =15PF C2,C3,C4,C5 = 100PF C6 = 470NF C7,C10,C11 = 470PF C8 = 47PF C9 = 56PF C12 = 22PF CV1,CV2 = TRIMMER 4 – 40PF CV3,CV4 = TRIMMER 60PF MAX. L1 = 3 turns of wire 24 AWG with diameter of 7mm, nucleus of air. L2 = Shock of RF of 0.22µH. L3 = 15 turns of wire 24 AWG around a resistor of 47Ω x 2W (it doesn’t serve as wire) L4 = 3 turns of wire 24 AWG with diameter of 7 mm, nucleus of air. L5 = 1 turns (sees fig. below for details) L6 = 3 turns of wire 24 AWG with diameter of 7 mm., nucleus of air. L7 = 4 turns of wire 24 AWG with diameter of 7mm, nucleus of air. Several = printed circuit board, antenna, cables, heatsink, box, etc. Detail of L5. That project is just for ends of didactic test, that doesn’t implicate in any responsibility of the idealizator about the non operation or illegality of operation of the equipment.
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    RF amplifier with BLY90
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    RF amplifier with BLY90
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