Bc548 Preamplifier Circuit. The Collector … BC548 has a gain value
Bc548 Preamplifier Circuit. The Collector … BC548 has a gain value of 110 to 800, this value determines the amplification capacity of the transistor. For long run in a circuit it is important to not increase load more than 100mA on . Email: anc@mitedu. Discrete Class A output stage with Carnhill transformer. Sugden IA4 Circuit 33W Pure Class A Single ended Amplifier Board Aliexpress from www. To achieve this with an ADMP504 preamp, you want the op amp to have a maximum noise floor of −113 dBV, or 15. BC548 has a gain value of 110 to 800, this value determines the amplification capacity of the transistor. co. Type: : Preamp Pickup: UPC: : 634458560573 . For BC547 Vcbo, and Vces are rates at 50 V. MM Turntable Preamplifier HC-01A Phono Amplifier Kit/Board Base On DUAL Circuit. A small current of the base terminal of this transistor will control the large current … There is not much to the circuit. 2uf x1 (6. it use to give a very good quality of sound, eventhough it was a AC coupled amplifier. It converts phantom power to up to 25dB of clean gain for all your microphones. It includes three terminals that are collector, base & emitter which are dissimilar in terms of doping concentrations, functions, and size. BC558 is a TO-92 packaged BJT transistor that can be used in many types of general purpose applications. Alternative transistors such as … @iabselectro1082 #shorts #diy #electronicproject #diyprojects #circuit #simpleproject #simple #howtomake Bc548 transistor Resistors (150k, 100k, 47k, 10k, 6. This preamp includes the 2623 output transformer. However, in this tutorial we are using a coil, three BC548 transistors, alongside two 1K and two 100K resistors, three 100nF and 10nF capacitors, a 250pF capacitor, crystal earphones, and a 1. They are the PA Audio system and expensive. This preamp is great for anyone who wants a vintage preamp reminiscent of the 70's console "sound". And take long times for making. $446. However, in this tutorial we are using a coil, three BC548 transistors, alongside two 1K and two 100K resistors, … The preamplifier employs CE configuration for the first stage, in which the base and emitter terminals constitute the input port, and the collector-emitter terminals are the output. These two amplifiers utilize voltage to enhance . 25,73 EUR. Here is a circuit diagram of a popular small power amplifier using LM386. This works well with 6v DC. Most of the op amps in Thus the BC548 (or BC546 to 550) is a valid substitute in any circuit designed for the older BC108 (or BC148), which includes many Mullard and Philips published designs. aliexpress. Test & Measurement. Sensors. Selectable saturation circuit for extra harmonics. ) Resistor - 10K x1 (3. Tube amplifier kit diy Wada Shigeru circuit 6Z4*2 ECC83*2 ECC82*2 Fever bile preamp Tube preamplifier. Apr 13, 2019 - 15W Audio Amplifier Circuit using TR TIP31, TIP32, BC548, C945. Fairchild became a leading supplier of power semiconductors, analog . 0006% . : onsemi / Fairchild Customer #: Description: Bipolar Transistors - BJT NPN 30V 100mA HFE/8 Lifecycle: Obsolete Datasheet: BC548 Datasheet (PDF) ECAD Model: Download the free Library Loader to convert this file for your ECAD Tool. UM66 is a complete miniature tone generator with a ROM of 64 notes, oscillator and a preamplifier. Both transistors are BC172. Circuit : Andy Collinson. @iabselectro1082 #shorts #diy #electronicproject #diyprojects #circuit #simpleproject #simple #howtomake Amazon. Free delivery and returns on eligible orders of £20 or more. This is the best amplifier for small power. Assembeld HC-01A MM Phono . freeserve. 5-V battery is employed. A 1. Touch device users, explore by touch or with swipe gestures. Nerd corner: this is built with a NOS J201 FET which are . 70dB of clean gain. ericgibbs Joined Jan 29, 2010 17,070 Feb 17, 2022 #7 hi spike, Preamplifier : Circuit, Working, Types, Differences & Its Applications. BC548 onsemi / Fairchild Bipolar Transistors - BJT NPN 30V 100mA HFE/8 datasheet, inventory, & pricing. BC546 / BC547 / BC548 / BC549 / BC550 — NPN Epitaxial Silicon Transistor @iabselectro1082 #shorts #diy #electronicproject #diyprojects #circuit #simpleproject #simple #howtomake For BC548 Vcbo, Vces, and Vceo, are rated at 30 V, and Veb is 5 V. ) Transistor - BC547 x2 (2. The BC549C is an NPN transistor belonging to a group of general-purpose NPN semiconductors consisting of BC547, BC548, and BC549. An amplifier is an electronic device or circuit which is used to increase the magnitude of the signal applied to its input. -Facebook Page - https://www. The first high-pass filter comes next and the RIAA equalization time constant at 75 μs follows. The famous Don Tillman preamp in a pedal. Furthermore, the performance of the circuit is the same as the circuits utilizing AM radio ICs. Full Balance Remote Control Hifi Preamplifier Reference Accuphase C-245 Circuit. While Emitter-Base voltage and Collector-Emitter voltages are 5V and 30V respectively. Here is … Furthermore, the performance of the circuit is the same as the circuits utilizing AM radio ICs. Introduction of Wada Shigeru's bile pre-stage circuit: 1: This and the Wada Shigeru kit and finished machine are the products of Changshu fever and old Chen Danyi after more than a year, and began to … Cloud Microphones Cloudlifter CL-4 Four-Channel Microphone Preamp. The first stage buffers the cartridge and provides two different gains depending on the cartridge’s nominal output voltage. Compare Product Add To Project | Add Notes Availability Stock: Not … BC458 is a general-purpose NPN transistor used in many electronics projects and devices. You can make this amplifier at … US $26. 3v to the coil directly. These were the same transformers featured in API input modules. 82 NE5532 IC MM Phono finished board Base on YBA circuit can reduce noise and gain for MC phono Use NE5532 IC with clear sound (we use gold plated IC socket and you can upgrade the IC to improve sound performance in simple way) the circuit is referenced to YBA's circuit . About This Listing. A transistor is nothing but the transfer of resistance which is used for amplifying the current. BC558 Transistor Bc548 transistor pinout datasheet stereo bass booster circuit projects 4 preamplifier circuits using transistors eleccircuit com 3v led dimmer with bc547 common emitter … this is regarding a circuit developed by Philips in 1970's. A power amplifier generally takes line-level signals and amplifies them for loudspeakers - it produces the larger power needed to drive speakers. Thermal Management. it is a 40/25/15 watts amplifier with Universal preamplifier circuit. CE. Watch. Further, the series of this transistor can be divided into three … The following figure shows the absolute maximum ratings of BC548: Collector-Base voltage is 30V. Pro. Notes: This is a 3 stage discrete amplifier with gain control. [citation needed] Pinout and specifications. Buy Electronic Component From Here:- https://www. You can see the project Dynamic Microphone Preamplifier using C945 transistor 2 vertion and easy to build with pcb layout see below. The preamplifier uses only two NPN transistors. Simple Cellphone Jammer Circuit 2. 100 mA) Note: The above specs can vary depending upon … BC548 Mfr. For amplification we have used a NPN transistor which is BC548. Simple Preamplifier Circuit using BC547 Transistor. The Fat Donny has a fixed 3dB boost and really brings a bit of zing to your pickups. An amplifier is a device used to amplify the power of the output signal, although with some additional noise whereas a preamplifier is a device used to change a weak electrical signal into a noise-tolerant clear output signal. Now, this … There is not much to the circuit. The BC546 is a high-frequency NPN transistor commonly used in low noise amplifier designs. facebook. A BC547 is a general purpose, small signal transistor fit for almost all types of circuit applications and therefore extensively used for making an unlimited range of electronic gadgets today. • Low current (max. ) Speaker x1 Ask Question Comment Step 2: Connect Both Transistors Firstly we have to connect both transistors. The company was known for its innovation in the development of the first commercial transistor and for its contributions to the advancement of the integrated circuit technology. , non aperto, nella confezione originale (ove la confezione sia prevista). Pinterest. com/LetsseeinsideOfficial-Business enquirers:- letsseeinsidebusiness@gmail. These are buffered by the second stage, which also provides the 318-μs . Connectors. Tools & Supplies. These transistors are used in audio frequency, and small signal … Volume: 320*170*120MM(W-D-H. Web #4 without circuits your only guide is the good channel. the preamp circuit as possible. La confezione deve essere la stessa che si può trovare in negozio. A small current at the base side is used to control large current at the collector and emitter terminals. This is where a PNP transistor differs from a NPN transistor. 150W Super Hybrid using … BC458 is a general-purpose NPN transistor used in many electronics projects and devices. The capacitive output load given by the microphone cable and the input impedance of the next device in the signal chain also determine the frequency response. Home; It's for this circuit. uk. Full manufacturer warranty (Pro Audio LA extends warranty to 2 years) Ships FREE w/ tracking & insurance. These pieces are occasionally backordered. The amplifier is an electronic circuit or device used for amplification and … Basic Overview and Features • Switching and Amplifier • High−Voltage: BC556, VCEO = -65 V • Low−Noise: BC559, BC560 • Complement to BC546, BC547, BC548, BC549 • These are Pb−Free Devices • PNP transistor in a TO-92; SOT54 plastic package. The Difference between BC548 and BC549 The BC548 and BC549 are … Dynamic Microphone Preamplifier using 3 transistor. About ON Semiconductor. BC548 Features and Specifications Package Type: TO-92 Transistor Type: NPN Max Collector Current (IC): 500mA (Continuous) Max Collector-Emitter Voltage … When you connect the Condenser Mic Preamplifier Circuit and provide any weak audio signal to the microphone, those audio signals touch the diaphragm of that mic attached to the circuit. Web this monstrous integrated amplifier, which cost £3,499 when it was first released a decade ago, was a sugden a21a on steroids. Cup Full … The WA-MPX is an authentic reproduction of the most revered microphone tube preamp that pioneered the birth of rock 'n' roll & radio-ready hits. Same has been demonstrated in the … The similar transistors are like BC548 & BC549. Livraison gratuite. Explore. electronicspices. Buy Vaguelly Bass Line Guitar Accessories Para Niños Preamplifier Bass Parts Guitar Tone Control Wiring Harness Electric Bass Pickups Bass Circuit Bass Line Music Instrument Parts at Amazon UK. Besides that it can also be used in commercial circuits. Bc548 transistor Resistors (150k, 100k, 47k, 10k, 6. The … We may use simple circuits as shown in block dash include Full wave rectifier D1, D2, and capacitor filter C7. This circuit works with an electret microphone and can be used for several applications. 46 shipping. BC558 is a PNP family-based bipolar junction transistor, used in switching & amplification-based applications. 9 nV/√Hz. It uses a single supply source from 6V to 12V, at the current … Envíos gratis en el día Compra en meses sin intereses y recibe tu ☞ Eq B2t 2 Band Active Eq Preamp Circuit Para Bajo Con Salida Circuito de preamplificador de ecualizador de 2 bandas Arnés de cableado de pastilla activa para bajo Descripción: nuevo La alta calidad y las pruebas están bien. 5V battery. Artí como la imagen que se muestra 1 potenciómetro de volumen + 2 de tono con equilibrio de volumen : Maestro Graves : +/- 12 dB a 7 kHz El paquete incluye: 1 circuito de preamplificador de … present for every MOS device in a circuit, these design choices afford significant opportunities for optimizing circuit performance. It can be used as for any type of general amplification or switching. Discrete DI audio path. Amplitude Modulation And . Power. com ,the Leading Trading Marketplace from China BC548 Datasheet (PDF) - ON Semiconductor Description Amplifier Transistors (NPN Silicon) BC548 Datasheet (HTML) - ON Semiconductor BC548 Product details Amplifier Transistors NPN Silicon Features • … Fairchild Semiconductor was a pioneering semiconductor company that was founded in the late 1950s. Like most other ESP projects, it . For using it as a switch to drive … Phono Preamp Circuit. Polarisation correction is essential because of the amplification differences and is assured with T12. The maximum amount of current that could flow through the Collector pin is 500mA, hence we cannot connect loads that consume more than 500mA using this transistor. P2 brings the output voltage to 0. Here BC548 makes a common emitter circuit. Moreover, the coil L1 is equivalent to 80 . @iabselectro1082 #shorts #diy #electronicproject #diyprojects #circuit #simpleproject #simple #howtomake Here is a typical audio amplifier circuit using biasing resistors, and an LT700 output transformer. Learn more about ECAD Model. The phono preamp described here has an accurate RIAA equalisation curve, is very quiet, and offers better sonic performance than the vast majority of those seen in magazines and application notes. amplitude modulation with transistor BC548 datasheet. Skip to Main Content (800) 346-6873 . The result is an extremely amp-like and versatile clean boost/overdrive/fuzz pedal that imparts rich harmonics and a very musical EQ to your signal chain … truly a Chimera in a box Shopping for Cheap Tube Pre-Amplifier at HIFI EXQUIS and more from hifi exquis,tube pre-amplifier,12ax7 tube,tube branding,tube microscope,preamplifier circuit on Aliexpress. The preamplifier circuit consists of three stages. it was very popular in DIY groups at that time. This preamplifier circuit with two transistors. Touch-sensitive switch circuit. Companies like … Introduction to the Amplifier. Amplifier is the generic term used to describe a circuit which produces and increased version of its input signal. AM Transmitter Circuit Electronic Circuits and Diagrams June 21st, 2018 - Follows FCC regulations and still produces enough . The assignment of transistor elements (b,c,e) to leads, i. @iabselectro1082 #shorts #diy #electronicproject #diyprojects #circuit #simpleproject #simple #howtomake Description: A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm output impedance. Like … The BC548 is a general-purpose NPN bipolar junction transistor commonly used in European and American electronic equipment. In the input differential stages we’ve used the dual transistors T1 and T2. 8k, 1k) Polyester film capacitors (220pf, 100nf, 47nf) Screw terminal Circuit description: this is a stereo preamplifier circuit and … Find many great new & used options and get the best deals for PERREAUX EP-3 STEREO PREAMP ORIGINAL BOX with MM / MC phone at the best online prices at eBay! Free shipping for many products! . The IC UM66 is connected to its supply and its output fed to a transistor for amplification. BC548 VCEO 65 45 30 Vdc Collector - Base Voltage BC546 BC547 BC548 VCBO 80 50 30 Vdc Emitter - Base Voltage VEBO 6. This Pre-amplifier circuit is built by assembling the following components together – 1) DC Source – There are two sources of power required in this circuit. Buyer is responsible for its products and applications using ON . RF Circuits. Enclosures. It is notably often the first type of bipolar transistor hobbyists encounter and is often featured in designs in hobby electronics magazines where a general-purpose transistor is required. Antennas Bruce Carter AM Modulator AM Radio PreAmplifier … how to make mic pre amplifier circuit #shorts #electronic #electric #full@arpit5795 @zamzamelectronicstradingllc @ElectroBOOMplease subscribe for upcoming vi. If the proposed simple surround sound decoder circuit is not well built you may face constant issues compared to a well-built one. 3 Band EQ Equalizer Preamp Circuit Pickup Guitar Bass Tone Control with Fittings for Guitar Bass Lovers : Amazon. To bias a transistor we have to supply current to base pin, this … BC548 as switch 12v - General Electronics - Arduino Forum BC548 as switch 12v Using Arduino General Electronics notsolowki September 25, 2021, 2:03am 1 i have a relay that needs 12v to turn on the coil. Moisture sensitive alarm. … BC558 is a PNP transistor hence the collector and emitter will be closed (Forward biased) when the base pin is held at ground and will be opened (Reverse biased) when a signal is provided to base pin. Les meilleures offres pour Kit d'amplificateur de platine tournante MM HC-01A kit/carte base sur double circuit sont sur eBay Comparez les prix et les spécificités des produits neufs et d 'occasion . Audio Preamp circuits. 0 Vdc Collector Current − Continuous IC 100 mAdc Total Device Dissipation @ TA = 25°C Derate above 25°C PD 625 5. A pre-amplifier takes the very weak signals from a microphone (for example) and boosts it to line-level. 0 mW mW/°C Total Device Dissipation @ TC = 25°C Derate above 25°C PD 1. Electromechanical. However as we will see in this introduction to the amplifier tutorial, not . cost revenue and profit word problems pdf extremely huge blackheads removed new videos what to wear on a rainy day at home govee bluetooth mac address god of war . Circuito de preamplificador de ecualizador de 2 bandas Arnés de cableado de pastilla activa para bajo Descripción: nuevo La alta calidad y las pruebas están bien. Heat sensor circuit. Circuito de preamplificador de ecualización de 2 bandas B2T Arnés de cableado de pastilla activa para bajo Descripción: 100% nuevo La alta calidad y las pruebas son buenas Artículo 100% como la imagen que se muestra 1 potenciómetro de volumen + 2 de tono con balance de volumen : Maestro Graves: +/- 12 dB a 85 Hz Agudos: +/- 12 dB a 7 kHz El paquete … Sweepable high-pass filter, 30-400Hz, 12dB/oct. com/ Smallest amplifier circuit using BC548 very common and cheap transistor If u really like this video … High Audio Amplifier Circuits Diagram More 101 watts up— They may be suitable for the beginner. ON Semiconductor is a publicly traded company that designs, develops, and manufactures a wide range of semiconductor products for various applications, including automotive, computing, … They call this the preamp pedal because it is ! The circuit is based on the Chimera 30 watt guitar amplifier, but substitutes FET transistors for the vacuum tubes. You may also use BC547 instead, or another … BC548 is another general purpose widely used transistor that can be easily get from reputable electronic components store, this … 9 Likes, 0 Comments - Red Beard Pro Audio (@redbeardproaudio) on Instagram: "Right now, save over 45% on the Tonelux MP5A500 Preamp. Description: A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm … This compares well with the BC547, BC548, and BC549 general purpose transistors which have a peak collector rating of 200 mA and power dissipation of 500 mW. Pulse Amplitude Modulation PAM Circuit Design. Schitt … Pre-amplifiers are designed to have low output impedance (around 25–100 Ω) in order to preserve high frequency response (usually flat in the range of 1–200 kHz). ) Power supply - 5V DC (5. Vceo is 45 V, and Vebo is 6V. Wire & Cable. The BC547 comes in TO-92 packaging and the maximum output current it can handle is 100mA. 73 + $127. C1 and R3 supply treble boost/bass cut; they could be eradicated, if preferred. Get all the details and dynamic range out of your dynamic, ribbon, or tube microphones with the CL-4 Cloudlifter. BC558 has a gain value of 110 to 800; this value determines the amplification . Like every other NPN transistor, it consists … The VP26 circuit is inspired by the 312 with a few extra components like coupling capacitors and loading resistors. how to make mic pre amplifier circuit #shorts #electronic #electric #full@arpit5795 @zamzamelectronicstradingllc @ElectroBOOMplease subscribe for upcoming vi. But someone who wants a high-quality power supply should use a 12V DC regulator. There is not much to the circuit. 2N3904 Vs BC547 Its electrical properties compare much more favourably with the BC547, where Vcbo = 50 V, Vces = 50 V, Vceo = 45 V, Vebo = 6 V. This book addresses tradeoffs and optimization of device and circuit performance for selections of the drain current, inversion coefficient, and channel length, where channel width is implicitly considered. com. It's the classic 250 Overdrive / Preamp circuit modified to offer seven different clipping options: germanium, silicon, LED, and no clipping, plus three "in between" asymmetric combinations of . ) Aux cable x1 (4. BC548 Features and Specifications Package Type: TO-92 Transistor Type: NPN Max Collector Current (IC): 500mA (Continuous) Max Collector-Emitter Voltage (VCE): 30V Max Collector-Base Voltage … Bc548 transistor pinout datasheet stereo bass booster circuit projects 4 preamplifier circuits using transistors eleccircuit com 3v led dimmer with bc547 common emitter amplifier diyode magazine as a switch ldr pg1n s ham radio site bc serie description package equivalent 12v general electronics arduino forum handy fm transmitter project ebook by … how to make mic pre amplifier circuit #shorts #electronic #electric #full@arpit5795 @zamzamelectronicstradingllc @ElectroBOOMplease subscribe for upcoming vi. Circuit Protection. Due to difficulty of finding BC650C, instead of them, as you can see in the schematic, you can use BC549C transistors. Stereo MM Phono RIAA Amplifier NE5532 Preamplifier Module Base . originally the output transistors are BD182. This circuit is designed to sit as close to your guitar as possible in the chain to fatten up your tone and give you a nice top end sparkle. Passive Components. Here is an Electret Condenser Microphone – ECM preamplifier circuit based on ultra low noise BC650C transistors. Datasheets: BC237B BC548 Also, I wonder: can anyone tell me if there's anything wrong with the circuit by just looking at what's written and shown? I had someone criticizing the IC used, but I don't thing there's anything wrong at all. Sponsored. BC548 transistor is used for amplifying and switching purposes in electrical circuits. Transistors are limited by four related maximum values, Vmax, Imax, … Pre amplifier with transistors BC548. A good rule of thumb is for an op amp’s noise to be at least 10 dB quieter than the microphone itself to minimize its contribution to the overall noise. You'll also like: 1. Pre amplifier circuit with transistors can be used to supply source from 6-12Volt the current minimum is 2-3 mA and can extend the signal … arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. female ufc fighter vs average guy uci sap appeal couples taped having sex in hotel. 8k, 1k) Polyester film capacitors (220pf, 100nf, 47nf) Screw terminal Circuit description: this is a stereo preamplifier circuit and … BC548 Datasheet (PDF) - ON Semiconductor Description Amplifier Transistors (NPN Silicon) BC548 Datasheet (HTML) - ON Semiconductor BC548 Product details Amplifier Transistors NPN Silicon Features • … This class A preamplifier has been designed in a symmetrical structure. Step 1: Take All Parts As Shown Below Components required - (1. . Nerd corner: this is built with a NOS J201 FET which are nearly impossible to get. A power supply of 5V is required for biasing of microphones … BC548 is an NPN general-purpose transistor, comes with three pins named emitter, base and collector. but most of the people used with … There is not much to the circuit. (This is of course subjective, and is based on countless reports from those who've built it). benelli ethos length of pull adjustment Dynamic Microphone Preamp. " Red Beard Pro Audio on Instagram: "Right now, save over 45% on the Tonelux MP5A500 Preamp. It has a maximum gain value of 800 and a high collector to emitter voltage of 65V, making it suitable for high voltage audio and signal amplifier applications. ) Capacitor - 63V 1uf/2. For maximum performances, T7 and T9 surfaces must be … The circuit schematic for the first audio preamplifier is presented in fig 1. ON Semiconductor offers a broad portfolio of power management, analog, and discrete semiconductors, including power MOSFETs, … There is not much to the circuit. BC549C Transistor. a meno che l'oggetto non sia stato confezionato dal produttore in una confezione anonima. jp: Topping L30II DAC Headphone Amplifier, NFCA Circuit, Preamplifier, High Resolution Headphones, 3-Stage Gain Settings, 3,500 mW x 2, Low Noise, 0. This fully discrete 500 series module is . There are several input and …. The BC547 is a general purpose BJT NPN transistor mostly used in electronics hobbyists and educational electronics projects. Im using esp8266 and only can supply 3. com-Instagram - … Therefore, the BC548 transistor would have a current gain of 1 at 250MHz, or 250 at 1MHz, assuming other values are suitable, as each condition effects other limits. The company was founded in 1999 and is headquartered in Phoenix, Arizona. Description: A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm … @iabselectro1082 #shorts #diy #electronicproject #diyprojects #circuit #simpleproject #simple #howtomake To Fit: : Bass Guitar: Instrument Family: : Preamp Circuit . The … Description Audio Preamplifier Circuit with Operational Amplifier with ne5532 or tl072 or Audio preamplifier circuit with op amp, can use various dual operational amplifiers such as TL072, NE5532, OPa2134, CA1458, RC4588, LM358, LM4558, NJM4560, LM258. 5 12 W mW/°C Operating and … BC548 is an NPN general-purpose transistor, comes with three pins named emitter, base and collector. with premium components and true-to-original circuit design, WA-MPX authentically delivers the iconic analog warmth and tape-era tube tone that is still chased by today's mode I actually built this drive on stripboard when I wanted to test out pedal labeling with a vinyl cutter (!) and in the process found out it sounds killer. Dynamic Microphone Preamp. The BC548 is supplied in a standard TO-92 3-pin package. e. the "pinout . ca: Musical Instruments, Stage & Studio The BC547 transistor is an NPN transistor. Today. ) Capacitor - 63V … Here we have used this Preamplifier circuit for amplifying the AUX output of Mobile phone and amplifying the voice input given by the condensor mic or microphone. The Shopping … About Circuits. Example signal levels for comparison purposes The BC548 is a general-purpose NPN bipolar junction transistor commonly used in European and American electronic equipment. This transistor works in a fixed DC voltage in the preferred region of its characteristics which is called the biasing. When autocomplete results are available use up and down arrows to review and enter to select. It is notably often the first type of … Simple Preamplifier Circuit using BC548 Transistors. The circuit is self stabilizing and sets its Q-point at approximately half of the supply voltage at the emitter .