One of my interests is restoring vintage transistor radios. Bf494 datasheet, equivalent, cross reference search. Great performance or range is not guaranteed here, because this is an elementary design. Features high power gain low noise figure high transition frequency 94 9308 1 3 2 bfr91 marking. Simplest fm transmittermodulation circuit with bf494. Is the problem from the transistor or something else. Product specification supersedes data of september 1994 file under discrete semiconductors, sc04 1997 jul 08. Discrete semiconductors data sheet book, halfpage m3d186 supersedes data of september 1994 file under discrete semiconductors, sc jul 08. Bf495, bf495 datasheet, bf495 npn medium frequency transistor datasheet, buy bf495 transistor. We are closely monitoring the coronavirus covid19 situation and will keep you informed of any changes.
I get datasheets from your circuit design determines the output current. Free device maximum ratings rating symbol value unit collector. You can get the datasheets and the parts for less than radio shack here. Recent listings manufacturer directory get instant insight into any. So we cannot process or ship any order untill april 14. The noninverting pin is connected to the variable resistor of 10kohms. General purpose radio frequency transistor bf 494 q1 is used here for obtaining fm modulation. Fairchild, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. But the reliability and failure modes of vintage transistors is interesting, and is the subject of this article.
They are listing ucev i am hoping that means vce qpoint with ib on the load line, along with ic. Bf450 pnp medium frequency transistor book, halfpage m3d186. Electronic manufacturer, part no, datasheet, electronics description. Bf494 silicon transistor components datasheet pdf data sheet free from datasheet data sheet search for integrated circuits ic, semiconductors and other electronic components such as resistors, capacitors, transistors and diodes. Silicon npn planar rf transistor electrostatic sensitive device. The local electronics shop did not have the transistor bf494,so i put 2n3904. A to5 transistor with a p d of 3 watts might be able to dissipate 810 watts with a heat sink. Bf495 npn medium frequency transistors 1997 jul 08 product specification supersedes data of september 1994 file under discrete semiconductors, sc04 philips semiconductors product specification npn medium frequency. Bf422 high voltage transistors npn silicon features this is a pb. The bc548 is a generalpurpose npn bipolar junction transistor commonly used in european. Datasheet search engine 350 million electronic component. Bf495 npn medium frequency transistors 1997 jul 08 product.
This is the fm transmitter circuit which apply 4 radio frequency stages, that are a vhf oscillator designed around transistor bf494 t1, a preamplifier designed around transistor bf200 t2, a driver designed around transistor 2n2219 t3 and also a power amplifier designed around transistor 2n3866 t4. Bfr91 plastic case to 50 1 collector, 2 emitter, 3 base 623. Bf495limiting valuesin accordance with the absolute maximum rating system iec 4. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips for any damages resulting from such improper use or sale. Applications hf applications in radio and television receivers fm tuners. Bf494 datasheet npn frequency transistor nxp, bf494 pdf, bf494 pinout, bf494 manual, bf494 schematic, bf494 equivalent, bf494 data, bf494 circuit. Inverting pin of the lm386 ic is connected to the ground. Free packages are available maximum ratings rating symbol value unit collector. Posted on june 1, 2016 september 17, 2019 by pinout. It has an opamp internally, which acts as an amplifier. Elektronische bauelemente npn plastic encapsulated. Semiconductors data sheet book, halfpage m3d186 bf494. Maximum power, called p d, is the overall power a transistor can dissipate, through heat, without burning up. Universally useful and adaptable, the transistor is an essential component of electronic circuitry.
Hilitchi 250piece 10 values npn pnp power general purpose transistors assortment kit bc327bc558. Of course, after 40 plus years of life, most electrolytic capacitors are suspect and the carboncomposition resistors have drifted high and sometimes become very noisy. Bf495 bf495 transistor transistor bf494 transistor bf495 bf494 transistor equivalent transistors bf494 bf494 equivalent bf494b bf494 application note text. This shopping feature will continue to load items when the enter key is pressed.
Bf494, bf494 datasheet, bf494 npn medium frequency transistor datasheet, buy bf494 transistor. Bf494 bf494 npn medium frequency transistor datasheet buy bf494. Nte electronics is still open, shipping products from our large inventory every day. I decided to use ksp2222a to replace the bc548, and mpsh10 for the bf494. Worldwide supplier of high quality electrical electronic components.
Bf495 datasheet, equivalent, cross reference search. Here is the circuit diagram of the simplest fm transmitter using a transistor. Npn medium frequency transistor bf199 limiting values in accordance with the absolute maximum rating system iec 604. The philips datasheet shows the transistor from the bottom the side where the pins. Smallsignal transistor data book, 86 pages, 1984, motorola. Bf471 limiting values in accordance with the absolute maximum rating system iec 4. Posted on march 31, 2017 september 16, 2019 by pinout. Applications rf amplifier up to ghz range specially for wide band antenna amplifier. Wherever you need to control the flow of electricity in a device from transistor radios, to diodes, to circuit boards you can find a great collection of. Heat sinks and fans increase the ability of a transistor to dissipate heat. Product specification supersedes data of september 1994 file under discrete semiconductors. Bf393 high voltage transistor npn silicon features pb. Hilitchi 250piece 10 values npn pnp power general purpose. Silicon npn planar rf transistor datasheet catalog.
All of rf radio frequency oscillator fm transmitters. Home transistors general purpose bf series bf494 bf494 npn medium frequency transistor datasheet buy bf494 technical information philips semiconductors bf494 datasheet. Micro electronics, bf494, npn silicon rf small signal transistor. Of course you need the datasheet of the transistor to design a circuit using it.
Symbol vcbo vceo vebo ic icm ibm plot tstg tj amb parameter collectorbase voltage bf469 bf471 collectoremitter voltage bf469 bf471 emitterbase voltage collector current dc peak collector current peak base current. Bf494 bf494b npn medium frequency transistorbuy online electronic components shop wholesale best lowest price india. Transistor 3 catalog number 3 display 12 io, no clock 12 io. The current in a crystal radio is much less then the forward voltage will also be much less so i found the datasheet 47 years old. C547c datasheet 45 v, 100 ma npn transistor nxp, bc547c datasheet, c547c pdf, c547c pinout, c547c manual, c547c schematic, c547c equivalent, c547c data. Datasheet catalog for integrated circuits, diodes, triacs. Bf494 datasheet38 pages philips npn medium frequency. Thanks, i dunno if the bf194 datasheet covers the 194b, but guessing dont know the language that page 3 has what i am looking for.
The assignment of transistor elements b,c,e to leads, i. Discrete semiconductors data sheet book, halfpage m3d186 bf494. Bf495 limiting values in accordance with the absolute maximum rating system iec 4. Npn rf transistor, bf494 datasheet, bf494 circuit, bf494 data sheet. A datasheet for the 1n34a germanium diode said its forward voltage is typically 1v at 5ma which is much too high. We request our customer to stay at home and stay safe. It might sound stupid but im in a real doubt since many datasheets disagree regarding the bf494 transistor pinout.