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Orijinal görüntüsünü görmek için buraya tıklayın. 780x506 px. Daftar Komponen : TR1 ………………. SC1971. TR2 ………………. SC1964. C1, 4 ……………… 8 pF ( kondensator trimmer batu ). C2, 5 . ……………..10 pF ( Kondensator trimmer batu). C7, 8 ……………….20 pF ( Kondensator trimmer batu). C3, 6 ……………… 2200 mF/50 V. L1, 4, 7 …………. Diameter kawat 2mm Diameter inti udara 8mm . Jumlah lilitan= 3 lilit. L2, 5 …………… Diameter kawat 2mm Diameter inti udara 8mm Jumlah lilitan= 9 lilit . R1, 2 …………….. 100 ohm / 2 watt. L3, 6 …………….. Diameter kawat 0,4mm *.Catatan : Untuk R1, 2 dan L3, 6 dililitkan bersama . Cara merakitnya : 1. Kamu beli papan PCB polos di toko elektronik, lalu kamu lukis menggunakan spidol hitam hitam sesuai dengan gambar di atas kemudian rendam pada larutan feriClorida .Tunggu sampai bagian yang tidak terkena spidol hilang . 1. Kamu beli papan PCB polos di toko elektronik, lalu kamu lukis menggunakan spidol hitam hitam sesuai dengan gambar di atas kemudian rendam pada larutan feriClorida .Tunggu sampai bagian yang tidak terkena spidol hilang . 2. Setelah papan PCB sudah jadi, bersikan sisa tinta spidol dengan menggunakan kertas amplas halus kemudiaan libangilah pada bagian transistor( TR1, 2 ) membentuk kotak sesuai dengan bentuk transistor itu agar bisa menempel pada plat pendingin . 3. Pasanglah komponen-komponen pada tempatnya sesuai dengan gambar di atas, ingat kaki transistor jangan sampai terbalik . 4. Setelah semua komponen telah terpasang, sambungkan output dari pemancar 5 watt ke input Booster . 5. Di bagian output Booster, kamu pasang Dummy Load sebagai pengganti antena sekaligus untuk mengukur besaran daya keluaran dari Booster yang telah kamu rakit . 6. Sambungkan juga kabel tegangan DC 12V pada Booster, ingan jangan sampai terbalik kabel(+) dan (-) nya . 7. Untuk mengoptimalkan daya keluaran pada booster, lakukan penyetelan dengan mentrim kondensator trimmer (C1, 2, 4, 5, 7, 8 ) dan merenggangkan Lilitan( L1, 4, 7 ) sampai kamu mendapat daya keluaran yang maksimal . 8. Bila Daya keluran Booster sudah maksimal, kamu bisa mencobanya dengan menyambungkan ke Antena Pemancar FM . 9. Untuk mengetahui kekuatan modulasi dan mengatur ketepatan antena, gunakan SWR Meter . 10. Untuk kabel antena gunakan kabel koaksial RG 58 atau RG 8 yang berimpedansi 50 ohm . merakit boster pemancar fm 50w.pdf

Orijinal görüntüsünü görmek için buraya tıklayın. 780x506 px. Daftar Komponen : TR1 ………………. SC1971. TR2 ………………. SC1964. C1, 4 ……………… 8 pF ( kondensator trimmer batu ). C2, 5 . ……………..10 pF ( Kondensator trimmer batu). C7, 8 ……………….20 pF ( Kondensator trimmer batu). C3, 6 ……………… 2200 mF/50 V. L1, 4, 7 …………. Diameter kawat 2mm Diameter inti udara 8mm . Jumlah lilitan= 3 lilit. L2, 5 …………… Diameter kawat 2mm Diameter inti udara 8mm Jumlah lilitan= 9 lilit . R1, 2 …………….. 100 ohm / 2 watt. L3, 6 …………….. Diameter kawat 0,4mm *.Catatan : Untuk R1, 2 dan L3, 6 dililitkan bersama . Cara merakitnya : 1. Kamu beli papan PCB polos di toko elektronik, lalu kamu lukis menggunakan spidol hitam hitam sesuai dengan gambar di atas kemudian rendam pada larutan feriClorida .Tunggu sampai bagian yang tidak terkena spidol hilang . 1. Kamu beli papan PCB polos di toko elektronik, lalu kamu lukis menggunakan spidol hitam hitam sesuai dengan gambar di atas kemudian rendam pada larutan feriClorida .Tunggu sampai bagian yang tidak terkena spidol hilang . 2. Setelah papan PCB sudah jadi, bersikan sisa tinta spidol dengan menggunakan kertas amplas halus kemudiaan libangilah pada bagian transistor( TR1, 2 ) membentuk kotak sesuai dengan bentuk transistor itu agar bisa menempel pada plat pendingin . 3. Pasanglah komponen-komponen pada tempatnya sesuai dengan gambar di atas, ingat kaki transistor jangan sampai terbalik . 4. Setelah semua komponen telah terpasang, sambungkan output dari pemancar 5 watt ke input Booster . 5. Di bagian output Booster, kamu pasang Dummy Load sebagai pengganti antena sekaligus untuk mengukur besaran daya keluaran dari Booster yang telah kamu rakit . 6. Sambungkan juga kabel tegangan DC 12V pada Booster, ingan jangan sampai terbalik kabel(+) dan (-) nya . 7. Untuk mengoptimalkan daya keluaran pada booster, lakukan penyetelan dengan mentrim kondensator trimmer (C1, 2, 4, 5, 7, 8 ) dan merenggangkan Lilitan( L1, 4, 7 ) sampai kamu mendapat daya keluaran yang maksimal . 8. Bila Daya keluran Booster sudah maksimal, kamu bisa mencobanya dengan menyambungkan ke Antena Pemancar FM . 9. Untuk mengetahui kekuatan modulasi dan mengatur ketepatan antena, gunakan SWR Meter . 10. Untuk kabel antena gunakan kabel koaksial RG 58 atau RG 8 yang berimpedansi 50 ohm . merakit boster pemancar fm 50w.pdf

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.

Orijinal görüntüsünü görmek için buraya tıklayınız. Orijinal görüntüsünü görmek için buraya tıklayınız. Orijinal görüntüsünü görmek için buraya tıklayınız. Baskı devresi hazır olrak verilmiş olan güzel ve kaliteli bir Hi - Fi Anfi devresi Tüm malzemeleri piyasadan kolaylıkla temin edilebilir..

This RF power amplifier is based on the transistor 2SC1970 and 2N4427. The output power is about 1.3W and the input driving power is 30-50mW. It will still get your RF signal quit far and I advice you to use a good 50 ohm resistor as dummy load. To tune this amplifier you can either use a power meter/wattmeter, SWR unit or you can do using a RF field meter. RF Amplifier Assembly Good grounding is very important in a RF system. I use bottom layer as Ground and I connect it with the top with wires to get a good grounding. Make sure you have some cooling at the transistor. In my case I put the 2SC1970 close to the PCB to handle the heat. With good tuning the transistor shouldn't become hot. RF Amplifier Printed Circuit Board You can download a pdf file which is the black PCB. The PCB is mirrored because the printed side side should be faced down the board during UV exposure. To the right you will find a pic showing the assembly of all components on the same board. This is how the real board should look when you are going to solder the components. It is a board made for surface mounted components, so the copper is on the top layer. I am sure you can still use hole mounted components as well. Grey area is copper and each component is draw in different colors all to make it easy to identify for you. The scale of the pdf is 1:1 and the picture at right is magnified with 4 times. Click on the pic to enlarge it. Low-Pass Filter Some of you might want to add a low-pass filter at the output. I have not added any extra low pass filter in my construction because I don't think it is needed. You can easy find several homepages about low pass filter and how to build them.

This is circuit 13.8V, 40A Switching Power Supply,It is high current power supply switching regulator.And Nice Circuit for power user. This article was originally published (in a slightly modified form) in the QST magazine, December 1998 and January 1999, and in the Radio Amateur's Handbook, 1999. Visit the American Radio Relay League for information on these publications, and a world of ham radio related things! Design decisions There are several different topologies for switchers in common use, and the first decision a designer must take is which of them to consider. Among the factors affecting the decision are the power level, the number of outputs needed, the range of input voltage to be accepted, the desired tradeoff between complexity, quality and cost, and many more. For this power supply I decided to use the half bridge forward converter design. This topology connects the power transformer to a bridge formed by two power transistors and two capacitors. It is reasonably simple, puts relatively low stress on the power transistors, and makes efficient use of the transformer's magnetic capabilities.The second basic decision is which switching frequency to use. The present trend is to use ever higher frequencies. But by doing so it becomes more difficult to filter out the RF noise inevitably generated by the switching. So I decided to stay at a low switching frequency of only 25 kHz for the full cycle, which due to the frequency doubling effect of the rectifiers results in 50 kHz on the output filter. For the main switching elements, bipolar transistors or MOSFETs can be used. Bipolars have lower conduction losses, while MOSFETs switch faster. As in this design I wanted to keep the RF noise at an absolute minimum, very fast switching was not desired, so I used bipolar transistors. But these tend to become too slow if the driving is heavier than necessary. So, if the transistors have to switch at varying current levels, the drive to them must also be varied. This is called proportional driving, and is used in this project. The half bridge converter is best controlled by pulse width modulation. There are several ICs available for this exact purpose. I chose the 3524, which is very simple to use and easy to find. Any 3524 will do the job. It can be an LM3524, SG3524, etc. This basically ends the big decisions. From now on, designing the circuit is a matter of calculating proper values for everything.

Video upscaling nedir? Basit anlamda " Hochskalierung" (ingl. upscale) tam Türkce karsiligini bulamadim)) bir sekil resim sinyali iyilestirme/düzeltme, veyahut bir prosesi büyütme anlamina gelir, baska deyimle upscale de resim daha yüksek cüzünürlüge tahvil ediliyor- downscaling de tam tersi. Teknik acidan bakildiginda "upscaling" elimizdeki kaynak cözünürlügü baslangic noktasindan daha yüksek cözünürlüge dönüstürülmesi ve eksik kalan pixel`leri daha ince ve derin cözünürlüge interpolarasyon kanali ile cevrilmesidir.Tabi bununla yeni resim-icerigi olusmuyor fakat filtrelesmeyi engelliyor, kaynak sinyali birtek yeni büyük cüzünürlüge cevirseydik iste bu (filtrelesme) olurdu cünkü o zaman resimi yegane yeni cözünürlüge germis olurduk ve eksik kalan pixel`leri sonradan eklemis olmazdik. Bu yöntem genelde Home Cinema alaninda uygulaniyor, mesela bir DVD Player normal PAL cözünürlügünde malzemeyi HDTV cözünürlükteki TV lere "upscale" yapabilmesi gibi. Burda upscale görevini Playerlerde özel chipler (Faroudja veya benzeri donanımlarla ) üstleniyor, burdan cikan yeni material gercekzamanda (echtzeit) göstericiye (TV) aktariliyor. Bugünlerde giderek daha büyük Panel TV ve cözünürlükler (>42/50”) yapildigini ve kullanicilar tarfindan satin alindigini göz önünde tutarsak upscale islevi olan Multimedya (DVD) Playerlerin kullanilmasi tabiki daha avantajli oluyor, 480 satirlik normal PAL DVD sinyali bu yöntemle 720p hatta 1080i/p gösterimine yükseltilmis oluyor ki bu da gercekten filmde gözle görünür bir iyilestirme oldugu anlasiliyor. Kisaca diyebilirizki; Up-scaling özellikle DVD player ve Receiver'larda bir sekilde Farudja veya benzeri donanımlarla görüntüyü iyilestirip TV'ye aktarır, bu da sonucta daha iyi görüntü demektir. Alıntıdır.

Frecuencia: 87.5 MHz .108.0 MHz en saltos de 100 Khz Estabilidad frecuencia: típica +/- 500 Hz máxima +/- 1 kHz Relación armónicos: mejor que -45dBc Potencia: 900mW Pre-Emphasis: 50 uS Sensiblidad audio: 775 mV para modulación de +/- 75 kHz S/R: 75 dBu Distorsión audio: 0.2 % THD Respuesta en frecuencia: plana desde 20 Hz hasta 76 kHz Tensión de alimentación: 12 V ... 15 V Devamı ektedir

Astra 1G (31.5°E) - 12168V S/R 27500 FEC 3/4 - West Beam: DVB-S (QPSK) 4:2:0 PAL, Biss Key: 2C 31 50 AD 00 9D D2 6F HEX: 2C3150AD009DD26F DEC: 044 049 080 173 000 157 210 111 SID/ProviderID in HEX: 1C85 (Dec: 7301) VPID (in HEX): 012D (Dec: 301)