Ck722 datasheet, equivalent, cross reference search. A voltage or current applied to one pair of the transistor s terminals changes the current through another pair of terminals. Here is the text of the note that carl read to jerry. A bit more complicated, but if the goal is to use a ck722 transistor, it will give far superior performance without needing an external antenna. Stanleys, electronics for the beginner will specify 2n107 or ck722 in the parts list. A great deal of information contained in this raytheon transistor book has been made. The ck722 was the first lowcost junction transistor available to the general public. To the left is shown a raytheon ck722 diffused junction, p n p transistor with its 2 x. Projects include the usual crystal receiver, audio amp, and model train horn along with novel items like a.
I am also developing another ck722 transistor applications book, 50 years of the ck722. Dc converter, relay drive and motor drive applications z low drain. Select the part name and then you can download the datasheet in pdf format. Never saw a ck722 in the wild, but in 1964 or 65 i did see a substitution book that listed ck722 as substitute for 2n107. The operating characteristics of a transistor are all found on its data sheet. Neither of my two substitution manuals from the early 60s has the ck722, so i dont have an authoritative source. This book is a collection of practical transistor circuits, each of which has been. Ordering information marking diagram 2n 3906 alyw a assembly location l wafer lot y year w work week pb. Raytheon junction tran sistors, types ck721 and ck 722 can now be obtained for your experimental and developmental use. Npn switching transistor 2n3904 data sheet status notes 1.
A voltage or current applied to one pair of the transistors terminals controls the current through another pair of terminals. The ck722 is the first recollection i have of that transistor type, indeed, of any transistor type at all. 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. P2n2222a amplifier transistors npn silicon features these are pb. A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. This book consists of several nice transistor applications included interesting background of the used devices. Low current doesnt help the trs hf response which presumably is lousy at the best of times. These were made by etching depressions into an ntype germanium base from both sides with jets of indiumiii sulfate until it was a few tenthousandths of an inch thick. Sep 15, 2010 by know you should have come across the transistor theory twice, once in your preuniversity where they deal with the physics of transistor in depth and then in your 1st semester or 2nd semester depending on the college of b.
Sylvanias transistor circuit handbook for the hobbyist. The teacher noticed the thick book on shakespeare that carl. Toshiba power transistor semiconductor data book 1983. Raytheon got into the act too, introducing their transistors, especially the ck722, to the hobbyist market with the publication, raytheon transistor applications, more than 50 practical circuits using raytheon ck722 transistors. General electric decided to designate it with a jedec 2n series identification. Find ck722 transistor radios related suppliers, manufacturers, products and specifications on globalspec a trusted source of ck722 transistor radios information.
It is composed of semiconductor material with at least three terminals for connection to an external circuit. Sure, the 2n404 has more gain and less leakage, but it worked. Complete howtodoit instructions raytheon manufacturing co on. The raytheon ck722 germanium pnp transistor is a low performance bin of the ck718 shown above. If i ever manage to aquire one, id keep it aside as a collectors item anyway. In the reprint, raytheon added data sheets for the ck721 and ck722 transistors.
It is a blog created to share various information with you in more complete and detailed contents. Although the boys never came across one of norm krims ck722 transistors in their. Transistor datasheet, transistor pdf, transistor data sheet, datasheet, data sheet, pdf. Discover the best mosfet transistors in best sellers. Transistor yourstudent gemini wiki fandom powered by wikia.
The story of the ck722 ck722 classic germanium transistor. The datasheetarchive datasheet search engine author. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. The 2n107 is an early germanium alloy junction pnp transistor developed by general electric ge in 1955, to become ges entry into the electronic hobbyist market successfully started with the ck722 transistor. Toshiba field effect transistor silicon n channel mos type mosv 2sk2996 dc. Transistor project gutenberg selfpublishing ebooks. Transistor museum construction projects point contact. Download ic database equivalent guide 100 thousand components. A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. Thousands of radio kits using the ck722 were made in the 1950s and 1960s. Please consult the most recently issued data sheet before.
The ck722 holds a unique place in the history of the transistor. Discrete semiconductors the vintage technology association. I am the product manager for transistors at the raytheon company. Ck722 datasheet, ck722 pdf, ck722 data sheet, ck722 manual, ck722 pdf, ck722, datenblatt, electronics ck722, alldatasheet, free, datasheet, datasheets, data sheet. Allied radio, which sold both transistors through their catalog, sold a project book called understanding transistors and transistor projects dedicated to the 2n107. Kc850 datasheet, kc850 pdf, kc850 pinout, equivalent, replacement npn transistors kexin, schematic, circuit, manual. Ic software database dated 2003 with database information from more than 100,000 semiconductors such as transistors and integrated circuits. C536 datasheet v cbo 40v, 2sc536, npn transistor wej. Toshiba field effect transistor silicon n channel mos type. In the 1950s and 1960s, hundreds of hobbyist electronics projects based around the ck722 transistor were published in popular books and.
I knew it was a find when i got it, but then it sat, stored away, for many years. You can read about these books in the story of the ck722, which is now available from the author. Remember that their leakage current can be in that region. Raytheon transistor applications more than 50 practical circuits using raytheon ck722 transistors. Rum001l02 nch 20v 100ma small signal mosfet datasheet loutline vdss 20v sot723 rdsonmax. I n the mass of circuits and data that appeared during the earliest years of the. Toshiba power transistor semiconductor data book 1983 toshiba corporation 1983 acrobat 7 pdf 52. When the raytheon ck722 transistor applications book appeared in 1955, the first few pages listed radio projects that could be built with the ck722. Choosing transistor replacements electronics notes. Raytheon ck722 transistor introduced in 1953, the raytheon ck722 was the first commercial transistor available over the counter for hobbyists and experimenters. 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. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.
Need to know if the part can handle the frequency or give you the gain you need, look at the data sheet. Tech where need of biasing, different techniques of biasing, configuration like cb,ce,cc, stabilizing, cascading etc. The 2n107 is an early germanium alloy junction pnp transistor developed by. Transistors blue raytheon pnp ge germanium transistor ck722.
The operating parameters of the 2n107 are similar to raytheons ck722 and many hobbyist books would use both as interchangeable. Ck722 classic germanium transistor webpage and museum index. Some transistors are missing in the list like the 2n76, 2n110, 2n407 and 2n410. Nov 07, 2018 d2012 datasheet vcbo60v, npn transistor toshiba, 2sd2012 datasheet, d2012 pdf, d2012 pinout, d2012 manual, d2012 schematic, d2012 equivalent. Semiconductor data book, 11th edition presents tables for ratings and characteristics of transistors and multiple transistors. For rf power transistors, please go to the rf parts page for high voltage diodesrectifiers greater than 1,000 volts, please go to the high voltage parts page click on the thumbnail pictures to open up a much larger image of the parts in a new window. Welcome to the ck722 classic germanium transistor website and museum the ck722 holds a unique place in the history of the transistor. A voltage or current applied to one pair of the transistor s terminals contr. Tentative data on the raytheon ck722 germanium junction transistor. Transistor the reader wiki, reader view of wikipedia. These are western electric, general electric, raytheon, sylvania, and rca. Download ic database equivalent guide 100 thousand. The mythical ck722 transistor was the result of an inspired program established by norm to market hundreds of thousands of subperforming hearing aid transistors to young hobbyists.
Ive acquired an old ratheon ck722 transistor several years ago. Complementary power transistors stmicroelectronics. Most interesting aspect of this small book is the datasheet archive from a 2n22 of western electric till the 2n434 of general electric. Sep 24, 2004 my first transistor was 2n107 i think. Elektronische bauelemente pnp plastic encapsulated transistor. World heritage encyclopedia, the aggregation of the largest online encyclopedias available. Ck722 datasheet, cross reference, circuit and application notes in pdf format. Raytheon transistor applications more than 50 practical. Norm krim selected radio shack to sell the ck721 and ck722 through their catalog. Kt805 datasheet, kt805 pdf, kt805 pinout, equivalent, replacement transistor etc, schematic, circuit, manual. Well need to use that data sheet soon, said jerry, so put it away in a safe place. Complementary power transistors features low collectoremitter saturation voltage complementary npn pnp transistors applications general purpose audio amplifier description the devices are manufactured in planar technology with base island layout.
I am also developing another ck722 transistor applications book, 50 years of the ck722, volume iii, which will capture ck722 projects built by many of you over the past 50 years. If someone has a datasheet or other reference for the ck722, please post it. Pnp general purpose transistors book, halfpage m3d186. One of the most popular of these was on page 9 a regenerative receiver, designed and built by mr. Im trying to update as much information as possible, even if i can not find perfect information. It was an instant success spurring the creation of hundreds of kits and a large number of ck722 circuits over the next several years. Our first stop was the kitchen table, where jack presented each of us with a single transistor ck722 radio kit he had made. Ck722 ck721 ssa480 2sc912 sa52b sa537 2sc621 2sa525 2n3400 text. Pdf bsw88 200msa 15on0 bsw89 bsx81 200m5a bsx81a bsx81b germanium transistor ck722 ck722 ck721 ssa480 2sc912 sa52b sa537 2sc621. I once broke a leg off my ck722, i was a teenager and couldnt afford to buy another one, so i peeled the blue metal cover off and some gooey stuff, and there was a smaller, silver. Today i took some pictures of it and here they are. If you have never seen one of these beauties, they are royal blue with a red dot on them. Diodes and transistors pdf 28p this note covers the following topics. Sep 18, 2019 c536 datasheet v cbo 40v, 2sc536, npn transistor wej, 2sc536 datasheet, c536 pdf, c536 pinout, c536 equivalent, data, circuit, output, c536 schematic.
Free packages are available maximum ratings rating symbol value unit collector. The first highfrequency transistor was the surfacebarrier germanium transistor developed by philco in 1953, capable of operating up to 60 mhz. Like the ck722, it enjoyed a longstanding popularity. Introduced by raytheon in early 1953, the ck722 was the first low cost junction transistor available to the general public. The ck722 is regarded as the first low cost transistor available to consumers, and is the transistor used by bulova engineer max hetzel during prototype development of the accutron electronic timepiece. Oxford university press usa publishes scholarly works in all academic disciplines, bibles, music, childrens books, business books, dictionaries, reference books, journals, text books and more.
In those days very few knew about transistor regen receivers, but below is the schematic of a circuit first published by bohr which uses a ck722 transistor. 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. The ck722 was the most popular transistor ever made. When ive built a circuit in the past that called for a ck722, ive found that a 2n404 has worked as a substitute for me.
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