It is necessary to ensure that the replacement transistor will be able to operate at the relevant frequencies, so a similar or slightly higher ft is advisable. Af117 datasheet, af117 pdf, af117 pinout, equivalent, replacement transistor etc, schematic, circuit, manual. Parameters and characteristics r cross reference equivalent table transistors, scr, ic 2n2955 2n2955 to3 2n3055 2n3055 to3 2n3417 2n3417 to92 2n3704 2n3704 to92 2n3772 2n3772 to3 2n3773 2n3773. Another point to watch is that equivalent books list the af239s as a replacement for the af11x range. In this case, before fitting a replacement transistor, check the associated bias components. Introduction a transistor is a small electronic device that can cause changes in a large electrical output signal by small changes in a small input signal. There is an af118, but this is not found in transistor radios its a high voltage transistor intended for use in video circuits, but it is occasionally found elsewhere for example, the leak stereo 30 hifi amplifier. Some of the transistors are types with integrated resistors. A voltage or current applied to one pair of the transistors terminals changes the current flowing through another pair of terminals. General purpose rfif amplifier in lwmwsw receivers. Free mosfet circuits books download ebooks online textbooks.
Uk vintage radio repair and restoration transistor. Af127 magnatec af127 pnp bipolar transistor, 10 ma, 32 v, 3. Electronic repair transistor cross reference replacement. Download ic database equivalent guide 100 thousand. How do the transistors af114, af115, af116, and af117 differ from each other. But all this is some ones idea of what a equivalent is. Design and application of transistor switching circuits.
I have a transistor that got burnt and i need to replace it. Af178 datasheet, cross reference, circuit and application notes in pdf format. Transistor equivalents for the substitution of modern. Diodes and transistors pdf 28p this note covers the following topics. Af117 datasheet, af117 pdf, replacement, equivalent, data sheets, af117 pinout, schematic, circuit. The alloydiffused af114, af115, af116 and af117 transistors were introduced in the early 1960s. Business, books including many childrens books, computers, consumer, health, history, legal documents, mail order money making secrets, marketing, miscellaneous, advertising on tv each ebook is in microsoft windows format perfect for. Af124 datasheet, cross reference, circuit and application notes in pdf format. It could not be tuned due to the missing drive cord, but happened to be tuned to receive a bbc local station. The type numbers include af114, af115, af116, af117, oc170 and oc171. Basic semiconductor physics, diodes, the nonlinear diode model, load line analysis, large signal diode models, offset diode model, transistors, large signal bjt model, load line analysis, small signal model and transistor amplification. Semiconductor transistor, diode, ic cross reference.
International transistor equivalents guide bernard babani. Transistor the reader wiki, reader view of wikipedia. Af117 transistor when i first received the set i put some batteries in it and it worked with the waveband switch wiggled to make it connect. In practice, the af125 can be used to replace af114115116. Tube af 117 or rohre af117 id33809, transistor, wires and rfifstage shown. Af117 datasheet, equivalent, cross reference search. Select a replacement transistor with equivalent ft. Mullard highquali audio circuits, this book has already. This page contains list of freely available e books, online textbooks and. Dont go for a transistor with a much higher ft as this may increase the risk of oscillation. Ic cross reference cross reference ci stk cross reference ci tda cross reference ci sharp cross reference hitachi audio ic cross reference and circuit applications smd cross reference and equivalent we make every effort to ensure that the material on this site is accurate, however we do not warrant or represent that the information is free.
Transistor development continued, and the next family of devices, the af117 and equivalents, used a different manufacturing process that reduced the internal capacitance, eliminating the need for. It is addressed to amateur circuit designer with little or no previous knowledge on semiconductors. I replace these with equivalent af12 transistors which dont suffer with this problem, the af127 is the identical spec to the af117 and an af125. Vrt comparison table for semiconductors from a to z. There is much to be said for an introductory book written when the technology it. A transistor is a semiconductor device used to amplify and switch electronic signals and power. By far the most unreliable transistors are the af117 series used in the rf and if stages of many transistor radios produced in the 1960s. Transistor cross reference replacement and guide is very important for every engineers and technicians because the data that you found in this guide can help you to find the exact replacement for the components that you are looking for such as transistor, fet, ic, diode, zener diode and etc. Check our section of free e books and guides on mosfet circuits now.
That is, a weak input signal can be amplified made stronger by a transistor. Transistor equivalent circuits and models learning objectives general dc equivalent circuit ac equivalent circuit equivalent circuit of a cb amplifier effect of source resistance r s on voltage gain equivalent circuit of a ce amplifier equivalent circuit of a cc amplifier smallsignal lowfrequency model or representation. A voltage or current applied to one pair of the transistors terminals controls the current through another pair of terminals. Af117 nte equvilent transistor pnp germanium 30v ic. Although the software seems a bit ugly design running on dos, but it works perfectly with the database with many components and is free, makes an interesting tool to interested in electronics, want to know when information about a particular component or find a replacement the operation is quite simple and is separated by categories such as. Tin whiskers growing on internal walls of transistor can vintage radios this anecdote describes how collectors of vintage radios have combated the electrical shorting malfunction of certain transistors utilized in a variety of collectable radio sets. World heritage encyclopedia, the aggregation of the largest online encyclopedias available.
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. This page contains list of freely available e books, online textbooks and tutorials in mosfet circuits. The best equivalent transistors are the af12x series that are the same piece of. It is for this reason that gaas is used in high frequency applications. The gain of the 2sa1175rf will be in the range from 110 to 180, 2sa1175jf ranges from 5 to 220, 2sa1175hf ranges from 170 to 270, 2sa1175ff ranges from 200 to 320, 2sa1175ef ranges from 250 to 400, 2sa1175kf ranges from 300 to 600. There is no listed equivalent to the af118 and where replacement is needed for an old transistor tv, it may be necessary to rejig the circuit to take a suitably rated silicon device. Af117 cross reference electronic circuits, tv schematics. The russian germanium part i purchased to replace af117 has no goo inside. Af117 replacements uk vintage radio repair and restoration. Maximum power, called p d, is the overall power a transistor can dissipate, through heat, without burning up. Transistor academic dictionaries and encyclopedias. Af117 cross reference electronic circuits, tv schematics, audio.
Your are purchasing over 600 e books contained in a zip file. The 2sa1175 transistor might have a current gain anywhere between 110 and 600. Bipolar power transistor selection guide january 2003 table of contents product page general purpose transistors horizontal deflection output transistors product page dpak d2pak sot223 ipak to126 todarlington transistors dpak ipak to126 to220 to220f to3p to3pf switching transistors dpak d2pak to92 to126 to220 to220f to3p to3pf 2. Gaas has the highest electron mobility of the three semiconductors. Uk vintage radio repair and restoration transistor radio. They are pretty similar, according to my data book. Incidentally, alloydrift transistors tend to be noisy at low frequencies and as such are not generally suitable for audio circuits.
I keep looking for equivalent transistors, and sometimes find a website that gives a list equivalent transistor. I picked this little stella transistor radio from around 1962 up at a amateur. Everyday low prices and free delivery on eligible orders. Mullard data book, 19734, mister transistor and other websites see references. Transistor kit 10 value 200pcs npn pnp power transistor. Discrete semiconductors data sheet book, halfpage m3d186 bf450 pnp medium frequency transistor 1997 jul 11 product specification supersedes data of september 1994 file under discrete semiconductors, sc04 philips semiconductors product specification pnp medium frequency transistor bf450 features pinning low current max. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. Find transistors equivalent related suppliers, manufacturers, products and specifications on globalspec a trusted source of transistors equivalent information. If there are any other similar books that made the same mark for. Semiconductor cross reference book engineers of howard w. Keywords, af117, datasheet, pdf, etc, transistor, f117, 117, 17, af11, af1, af, equivalent, stock, pinout, distributor, price, schematic, inventory, databook. Making a transistor radio, by george dobbs, g3rjv is one of the huge series.
Choosing transistor replacements electronics notes. The links at left may help you to research your own replacement transistors. Transistors with internal shorts antique radio forums. A voltage or current applied to one pair of the transistor s terminals contr. This section contains free e books and guides on transistor circuits, some of the resources in this section can be viewed online and some of them can be downloaded. Af117 datasheet, af117 pdf, replacement, equivalent, data sheets, af117 pinout, schematic, circuit af117 datasheet search system, distributor. Transistor equivalent book pdf free download by corfikome.
Perhaps on some batches of af117 the tin plate on inside was too pure and too thick. Af117 type transistors are notorious for developing internal short circuits between the case connection and one of the other connections. Bf450 datasheet, equivalent, cross reference search. High voltage 75v video amplifier for transistor tvs. There are books galore on this but surely someone knows of a site that has them listed and searchable my query is a simple one i have no 2n5551 transistors on hand and i want to see if one in my box will do the job. First book of transistor equivalents american radio history. Free transistor circuits books download ebooks online. Smallsignal transistors replacement list bc337a bc337 equivalent type bc338 bc337 bc33816 bc33716 bc33825 bc33725 bc33840 bc33740 bc36816 bc63516 bc36825 bc63516 equivalent type bc547a bc546a bc548 bc547 bc548a bc546a bc548b bc547b bc548c bc547c bc549 bc547b bc549b bc547b bc550 bc547b bc550b bc547b bc557a bc556a bc558 bc557 bc558a. The oc45 and equivalentsimilar devices from other manufacturers were the first types of transistor to have widespread use in if amplifiers. Transistor equivalents for the substitution of modern transistors in elderly projects. Whe n two resistor values are given, the first is the series base resistor, and the second the resistor between base and emitter. By far the most unreliable transistors are the af117series used in the rf and if stages of many transistor radios produced in the 1960s. The purpose of this book is to help the reader to understand how transistors work and how to design a simple transistor circuit.
Mosfet equivalent books software free download mosfet. However when i came to repairing it, it had stopped working. Uk vintage radio repair and restoration transistor faults. Apr 17, 2017 although the software seems a bit ugly design running on dos, but it works perfectly with the database with many components and is free, makes an interesting tool to interested in electronics, want to know when information about a particular component or find a replacement. Even for the same transistor type the terminal assignment can vary normally indicated by a suffix letter to the part number, q. A to5 transistor with a p d of 3 watts might be able to dissipate 810 watts with a heat sink. Once upon a time, long ago, british and european transistors were commonly coded. This little seven transistor radio has long medium and short wavebands as well as a band spread facility for the higher frequency end of the medium waveband this radio is from the era when radio luxembourg on 208 metres was popular. Articles transistors in vintage radios marks pages home. In certain cases, the quoted collector current may be exceeded. Because the electron mobility is higher than the hole mobility for all semiconductor materials, a given bipolar npn transistor tends to be swifter than an equivalent pnp transistor type. However the af239s is a uhf device designed for use in tv uhf tuners and has a low gain min hfe 10 compared with the af11x types min hfe 50 and my experience is that it wont work properly if at all in most radio circuits. Consider the contents of this book as the first mile of a long journey into transistor.
Buy international transistor equivalents guide bernard babani publishing radio and electronics books by adrian michaels isbn. These have metal cans and four leads the fourth lead being connected to the can for screening. Apr 05, 2008 i during 80s and 90s, i used to search for components equivalents in books. Heat sinks and fans increase the ability of a transistor to dissipate heat. Is there anything available to see if a particular transistor can be replaced with a different one. Buy magnatec af127 pnp bipolar transistor, 10 ma, 32 v, 3pin to72 af127. Mar 21, 2004 years ago there were books for transistor equivalents.
Most have a way to say i need a transistor like this. It is composed of a semiconductor material with at least three terminals for connection to an external circuit. Transistor project gutenberg selfpublishing ebooks. Hilitchi 24values 2n2222s9018 bc327bc558 npn pnp power general purpose transistors assortment kit pack of 840. Due to the method of construction employed in the manufacture of these transistors, together with the fact that they are now. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. Is there any webbased or stand alone program to do such service for transistors and ics. The purpose of the cross refererce guide is to assist you in searching for a part on our linecard by the manufacturer which is similar in function to products of other companies.
Does anyone know where the site is that you type in a transistor and get a list of equivalent transistor. To dismantle this set, three screws are removed, then the pcb is carefully listed out at al angle to allow the controls to clear their holes in the case. Nte cross reference guide enter the manufacturer part number of your semiconductors into the form below to locate a compatible nte replacement. Sn76477 2n4401 free transistor equivalent book semiconductor data handbook mj802 2n3866 s2p tis43 bc149c xr2206 application notes lm1 siemens transistor manual. Another point to watch is that equivalent books list the af239s as a. By far the most unreliable transistors are the af117series used in the rf and if stages of many transistor radios. As many members will know, af117 and similar transistors such as af115,116, and oc170171 were used in a great many british made.
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