It will sound somewhat different depending on the transistors you end up with. Ac128 datasheet, ac128 pdf, ac128 data sheet, datasheet, data sheet, pdf. Ac1xx transistor bipolar online from elcodis, view and download ac128 pdf datasheet, tools specifications. Spice models for ac127 and ac128 i made on a fairly detailed datasheet. I tested these models and everything worked for me. The datasheet shows the internals of the transistor, which looks like this a rough approximation using a typical npn r2 and r3 are internal to the transistor. Consider the contents of this book as the first mile of a long journey into transistor. Ac128 the 3port nonlinear model of the pnp transistor. Aug 08, 2011 im working on a guitar pedal that calls for a ac128 germanium pnp transistor and i was wondering why i might not want to just get a modern equivalent. Oct 22, 2010 of course you need the datasheet of the transistor to design a circuit using it. Im trying to update as much information as possible, even if i can not find perfect information. Mar 16, 2020 an ac128 transistor is a germanium positivenegativepositive pnp smallsignal amplifier. I just got some ac128 transistors from ebay and the rest was from, put it together just like the schematic.
On the small bear fuzzface faq, there is a drawing that illustrates how to measure transistor leakage near the end of the page. It is a blog created to share various information with you in more complete and detailed contents. 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. Ac128 cross reference electronic circuits, tv schematics. Ac128 datasheetpdf 1 page list of unclassifed manufacturers. Liven up your fuzz face, pimp your fuzz factory, wrangle your rangemaster. The highgain set will get you high distortion fuzz sounds with lots of sustain. Uk vintage radio repair and restoration transistor faults. The datasheet states the maximum allowed output current and your design should limit its output current to less. Low power af amplifier transistors like the oc71 can be replaced with the economically priced ac125.
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. Its never really done it for me so i mostly use a bc108 sunface. Ac128 germanium transistors transistorsics lowleakage pnp germaniums perfect for all your fuzzy desires. Etc1, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. I get datasheets from your circuit design determines the output current.
Ac128 datasheet, ac128 datasheets, ac128 pdf, ac128 circuit. The less common term blue dot marked the npn models ac127, ac176. The bc107, bc108 and bc109 are generalpurpose low power silicon npn bipolar junction transistors found very often in equipment and electronics books articles from europe, australia and many other countries from the 1960s. Ac datasheet, ac pdf, ac data sheet, datasheet, data sheet, pdf, gpd. In this case, this digital transistor is a ordinary npn transistor with base resistors. R1 allows connecting pin 1 directly to a digital output.
Etc1 germanium small signal transistors,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The ac128 is a great sounding germanium transistor but if you buy many of them, there will be a large number left over that have too much basetoemitter leakage to be useful in a voltage amplifier circuit. It was primarily used in guitar effects equipment and amateur radio sets. This book also gives some other information voltage to transistor which we can give, identification of. Get the best deal for germanium transistor ac128 from the largest online selection at. Mar 22, 2015 i find this in my old circuit electronics book. On the higher notes you will get lots of octave up and overtones. Ac datasheet, ac pdf, ac data sheet, datasheet, data sheet, pdf, gpd skip to content. Ac128 datasheet germanium small signal transistors. The middle layer serves as the switch and is known as the base.
Audio medium power types oc72 oc81d oc81 can be replaced with an ac128, a relatively high voltage, high current device. Initially in metal to18 packages, the range expanded over time to include other package. Fully tested with a peak atlas dc55 and sorted for gain, compensating for leakage. Tfk 949 al103 2n1167 halbleiter index transistor ad161 ac128 bsy19 tfk. The value of this current is given in the data sheet for d. It is very a small power amplifier, but good quality audio class ab amplifier in hifi applications.
Ordering information marking diagram 2n 3906 alyw a assembly location l wafer lot y year w work week pb. This value determines the amplification capacity, which is high in this transistor. Af109r datasheet, cross reference, circuit and application notes in pdf format. R2 forms a voltage divider with r1 such that the voltage on pin 1 needs to be more than the roughly 700 mv be drop of the bare transistor for the transistor to turn on. Does anyone have spice models for germanium transistors. This page contains list of freely available e books, online textbooks and tutorials in transistor circuits. Free transistor circuits books download ebooks online. Symbol parameter conditions value unit rthja thermal resistance from junction to ambient note 1 250 kw symbol parameter conditions min. Design and application of transistor switching circuits.
The component capable of delivering 2w continuously an used the ac128 thansistor into a 8 ohm load and 5w peak. Ac188 germanium transistor price, stock, datasheet. Free transistor circuits books download ebooks online textbooks. Ac188 datasheet germanium small signal transistors. Grover in order to use a pic microcontroller, a flipflop, a photodetector, or practically any electronic device, you need to consult a datasheet. Germanium small signal transistors, ac128 datasheet, ac128 circuit, ac128 data sheet. Mullard highquali audio circuits, this book has already. Check our section of free e books and guides on transistor circuits now. It is often nicknamed red dot to1 case because of the colored mark which marks the collector of pnp models ac125, ac128. Ac128 transistor datasheet pdf ac datasheet pdf download germanium small signal transistors, ac data sheet. Ac128 germanium transistor germanium transistors parts.
These are many simple audio amplifier circuit diagram using transistor. R1 is not part of the transistor, its just a typical load to work against for the simulation. Mullard soon switched to using the bc prefix for silicon, and ac for germanium, eliminating the confusion. Ac122 datasheet germanium small signal transistors. Ac128 pdf, ac128 description, ac128 datasheets, ac128 view. The fuzz face is a distortion guitar pedal designed in london by arbitrer electronics ltd in the autumn of 1966. Applies to shipments to germany with our standard courier service dhl when paid via paypal, credit card or lastschrift. Discrete semiconductors data sheet book, halfpage m3d186. Accelerometer demo running on 8bit s08 ac128 in data averaging mode. Choosing transistor replacements electronics notes. This analysis covers the first arbitrer fuzz face model equipped with pnp germanium transistors from the first releases. Diodes and transistors pdf 28p this note covers the following topics. Capricetransistor 7481tw granada 3d tube data sheet ech84 polo electronic. Download ic database equivalent guide 100 thousand.
Telefunken electronic, low power transistor data book 1977, scan, pdf. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. Bc107bc108 series low power bipolar transistors culticomp pdf. This is the document that the manufacturer provides telling you. Ac datasheet, ac pdf, ac data sheet, datasheet, data sheet. Delivery times for other countries and shipping methods can be found on our shipping information page. Npn general purpose transistor 2pc1815 thermal characteristics note 1. In certain cases, the quoted collector current may be exceeded. Ive got a dennis cornell reissue fuzz face grey one from about 2001ish. The bc107, bc108 and bc109 are generalpurpose low power silicon npn bipolar junction transistors found very often in equipment and electronics books articles from. The problem is not as universal as with the af117 series however, and replacement with a similar transistor from a scrap set will often be a permanent solution. The purpose of this book is to help the reader to understand how transistors work and how to design a simple transistor circuit. Ac126 datasheet, equivalent, cross reference search.
It is addressed to amateur circuit designer with little or no previous knowledge on semiconductors. Universally useful and adaptable, the transistor is an essential component of electronic circuitry. Silicon npn transistors stmicroelectronics preferred salestypes npn transistor description the 2n3439 and 2n3440 are silicon epitaxial planar npn transistors in jedec to39 metal case designed for use in consumer and industrial lineoperated applications. For the version mounted in a block of aluminium please see ac188k in related products tab above.
The ac128 transistor has become virtually obsolete, as have most other germanium transistors. Ac128 datasheet, equivalent, cross reference search. One of my interests is restoring vintage transistor radios. 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. But when you need to use transistors, it has several advantages, such as saving you can take old equipment come to made small circuits easier than the ic. Two germanium transistors type ac128 are selected by us for the best fuzz face sound. I sold it a long time ago and never finished the second one so this video is all i have at the moment.
Motorola small signal transistor data book 1984 motorola inc 1983 acrobat 7 pdf 47. Mullards first silicon transistors were the oc201 to oc207, pnp alloy types using the standard so2 metaloverglass construction such as the oc201 shown. They were created by philips and mullard in 1963 and introduced in april 1966. Germanium pnp transistors, manufactured by toshiba ac128 transistors are a popular choice for fuzz and overdrive pedals. 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 transistors on ebay. I have, however, been hankering after a germanium fuzz face and so had a look inside my fuzz face. To92 plasticencapsulate transistors s9018 transistor npn features z high current gain bandwidth product maximum ratings t a25. According to the datasheet, the typical values are 2v for on. A typical pnp transistor, such as the ac128, is composed of a layer of negative material sandwiched between two positive layers. Apr 18, 2018 these are many simple audio amplifier circuit diagram using transistor. Simple amplifier by transistor ac128 circuit wiring diagrams. The germanium transistors suffer from strong dependence on temperature and humidity, high variability ofthe parameters, high probability of breaking during soldering, high cost due to the fact that germanium is an obsolete technology.
Jun 14, 2017 spice models for ac127 and ac128 i made on a fairly detailed datasheet. These can occasionally be found on ebay, usually advertised as germanium devices. Free packages are available maximum ratings rating symbol value unit collector. The numbers of some that type transistors are ac127, ac128, ac187, ac188. Ac128 datasheet14 pages etc1 germanium small signal. Ac128 cross reference electronic circuits, tv schematics, audio. Choosing transistor replacements when repairing a circuit, or even building a new one it is often not possible to find the exact electronics component we tell you how to choose a suitable replacement. But the reliability and failure modes of vintage transistors is interesting, and is the subject of this article. 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. Ac128 datasheetpdf list of unclassifed manufacturers. Tube ac 128 or rohre ac128 id33948, transistor, wires and poweroutput shown. Switching circuit, inverter, interface circuit, driver circuit built in bias resistor r110k, r247k complement to ksr2006 absolute maximum ratings ta25c unless otherwise noted symbol vcbo vceo vebo pc tj tstg parameter collectorbase voltage collectoremitter voltage emitterbase voltage collector current. 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.
882 1030 1217 1236 272 40 434 426 1565 579 1115 176 382 482 171 777 74 669 1390 924 1310 95 1280 1390 172 1020 757 379 937 100 888 1322 1248 1082