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TransistorAmp BJT Transistor Amplifier Circuits Designer Software For the design of transistor amplifiers there is a new software available: TransistorAmp. With TransistorAmp you are able to create your individual transistor amplifier with a few mouse clicks. TransistorAmp is freeware.The tool TransistorAmp has a very easy to use user interface. You start every design with the menu item “New Amplifier”. In the pull-down-menu you choose your desired circuit. You can choose between, common-base-circuitcommon-emitter-circuitcommon-collector-circuit After that you get a dialog, where you have to put in all parameters of your amplifier. For the selection of the transistor type you can click on the button “Select transistor type from list”, and you will see a list of all supported transistor types. TransistorAmp supports some thousand transistor types. Select your desired transistor type there and click on OK. The selected transistor type will then be displayed in the dialog. TransistorAmp software.zip alternatif FileSwap.com : TransistorAmp software.zip download free

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.

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.

This HD TV UHF wideband amplifier(Ultra High Frequency amplifier) has a total gain of 10 to 15 dB in the 400 – 850 MHz domain frequency so it can be used where the tv signal is weak. For this UHF antenna tv amplifier to work correctly you need to cut the components pins as short as possible. C1, C2, C6, C7 are SMD type ( surface mounted ). This antenna tv amplifier or uhf wideband amplifier need to be build inside of a metal box and then connected close to the tv antenna. Prototype pictures (Prototip resimler) Antenna HD TV UHF band amplifier circuit schematic (Anten HD TV UHF bandındaki amplifikatör devre şeması) PCB layout for Wideband HD TV UHF Antenna TV Amplifier Circuit using transistor 2sc3358 (Baskı Devresi) The power supply is a simple 12V stabilized source. The antenna tv amplifier can be connected directly to the power supply thru coaxial cable of the tv antenna but you need a 10 – 100uH coil on the alimentation line. The tv set will be connected to the uhf amplifier thru a small coupling capacitor. Adjusting is easy, just bring the P1 to the middle and then adjust it untill you obtain the best tv image quality. Digital Tv antenna UHF amplifier components (Devrede kullanılan malzeme listesi): T1 -Transistor 2sc3358C1 – 10µF/35vC2,C9 – 1nFC3 ,C4 – 10nFC5,c6,c7,c8 – 10pFR1 – 470 OhmsR2 – 2.2 KR3 – 1KohmsP1 – 5KohmsL1,L2 – 2 turns 22AWG , 3mm Ø.L3,L4 – 10uH or 10 turns, 0.2mm Ø on ferrite..12 volts special power supply. 2sc3358 Transistörü kullanılarak Geniş Bant DTV UHF Anten TV Amplifikatör Devresi

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

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.

POWER SUPPLY WITH ADJUSTABLE OUTPUT 0-15V / 1A The objective of the schematic is to create a power supply that would produce an output of 0 V to 15 V at 1 A current. - 2N3055 – a complementary Silicon Epitaxial-Base planar NPN transistor mounted in TO-3 metal case for use as power transistor- Bridge Diode – also known as bridge rectifier which has four diodes arranged in a bridge configuration where the output voltage has the same polarity with either polarity of the input voltage The construction of this power supply schematic is very simple in such a way that the components used are easy to be located while the cost is very cheap. With the biggest provided current at 1 A, the output voltage is adjusted for minimal ripple effect and stabilized in the range of 0 V to 15 V DC. This is made possible by the standard transformer output of 1.5 A with a primary winding voltage of 220 V and secondary voltage of 18 V. The current is being limited by the Zener diode D1 with a rating of 18 V and 1.5 W. The linear potentiometer R2 is responsible for the regulation of current. The power transistor Q1 is a classic type that would require to be placed in a suitable heatsink to suppress the high heat dissipation during the operation of the circuit. The heat dissipation will be continuous during the presence of the highest current. The bridge diode GR1 will provide full wave rectification from the AC input which will also convert the incoming alternating current (AC) input into direct current (DC) output. One good feature of the bridge diode is maintaining the same polarity of the output regardless of the polarity of the input. R1= 56ohm 2W R2= 330ohm Lin. pot. C1= 2200uF 35V C2= 100uF 35V C3= 10uF 25V C4= 220uF 25V C5= 100nF 100V GR1= 4 X 1N4007 Q1= 2N3055 T1=220V@18V 1.5A D1= 18V 1.5W zener The 15V/1 A power supply may be used to handle home automation control system which can be powered by 12 Vdc. They can be made into power adapter models to support a wide variety of applications such as TFT monitors, broadcasting, laptops, digital cameras, telecommunications, PSP’s, routers, notebooks, guitar effects pedals, KVM extenders, iPod’s, scanners, CCTV’s, printers, cassette players, radios, and other portable applications. POWER SUPPLY WITH ADJUSTABLE OUTPUT 0-15V 1A.pdf Alternatif Link FileSwap.com : POWER SUPPLY WITH ADJUSTABLE OUTPUT 0-15V 1A.pdf download free

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.

This is a very high 1500W power amplifier circuit diagram by Rod Elliott. The circuit is built using 10 pairs of power transistor MJ15024 and MJ15025 (or MJ21193/MJ21194), then it will use 20 pieces of power transistor for final amplification. With very high power audio output, then of course it will need power supply with high power output. This amplifier require dual output power supply 130V.

741 ile yapılmış bir transistör test cihazı devresi yukarda yer almaktadır

Di dalam Tuner blok FM salah satunya terdapat rangkaian osilator, penguat RF dan juga mixer, kita manfaatkan rangkaian osilatornya untuk dikuatkan sehingga jadilah sebuah pemancar FM yang praktis dan memiliki ketahanan tinggi terhadap frekuensi goncang, artinya meskipun dipancarkan terus menerus tidak ada pergeseran frekuensi yang berarti, masih bisa stabil meskipun tidak dikendalikan dengan PLL. Inilah kelebihan osilator yang terdapat pada tuner blok kalau tidak salah jenis osilatornya colppits, di bawah ini gambar osilatornya. Dengan rancangan yang minimalis dan penggunaan komponen juga kecil seperti Resistor dipilih yang berdaya 1/8 watt sehingga dihasilkan sebuah racangan pemancar yang praktis tetapi berdaya cukup besar, menurut data 2SC2538 bisa keluar maksimum 0,5 Watt. Dalam rangkaian saya batasi catu daya menggunakan 9 volt dc karena sudah tiga tingkat penguatan, dan menjamin 2SC 2538 tetap dingin. Jika digunakan untuk mendorong 2SC1971 maupun 2SC2539 sungguh menghasilkan keluaran daya maksimal. Daftar Komponen C1, C7 = 223 C2,C3 = 20pF C6 = 25pF C4,C5,C8,C9 = 102 C10 = 33pF C11 = 10uF C12 = 100uF R1,R4 = 22k R2,R5 = 10 R3,R7 = 47 R6 = 33 R8 = 1k R9 = 10 Q1,Q2 = FCS9018 Q3 = 2SC2538, 2SC2053 D1 = 1N4148 L1,L2,L3,L4 = 5T IC1 = 7809 Untuk merubah frekuensi kerja tinggal putar tuner blok sesuka kehendak kita. Dengan kestabilan osilator yang dimiliki oleh tuner blok tersebut, wah asyik juga kalau digunakan untuk broadcasting. Akhirnya pun dikuatkan lagi dayanya sampai 60 watt, waktu itu saya gunakan transistor 2SC 2539 dan 2SC 2630. ditambah pula dengan Enkoder maka jadilah pemancar yang stereo. Orijinal görüntüsünü görmek için buraya tıklayın. 776x552 px. Orijinal görüntüsünü görmek için buraya tıklayın. 773x569 px. Orijinal görüntüsünü görmek için buraya tıklayın. 783x583 px. Orijinal görüntüsünü görmek için buraya tıklayın. 600x370 px.