Ck722 transistor equivalent book

Free transistor equivalent book transistor bipolar junction. Complete howtodoit instructions paperback january 1, 1955 by raytheon manufacturing co. There is a market in good quality examples because for many people in the us this was their first transistor and they feel nostalgic about it. Semiconductor transistor, diode, ic cross reference. Smd cross reference k72 electronic circuits, tv schematics. Raytheon ck722 1 piece, germanium pnp alloy junction transistor. I thought it would be appropriate to construct a simple one transistor radio using a single ck722 to commemorate the 50 th anniversary of the introduction of this famous transistor.

The raytheon ck722 is one of the best known and wellremembered transistors from the 1950s1960s. This is probably the simplest project in any of the morgan books. Lists are available for stamped addressed envelope. They sell a couple of books on the early semiconductors as well as some of those transistors themselves. Check out macoms rf transistor cross reference lists for end of life products. This book is the first of a series of history of transistors publications developed. They could be considered equivalent to a general purpose tube like a 6j5. Pnp npn transistors kit, three pins silicon power transistor assorted assortment box set range 2n3904mps2907, 10value,pack of 200, by ltvystore 4. Ck722 germanium transistor construction projects new volume. Introduction is in italian, but most of the book is tables of data with headers in english.

Ck722 germanium transistor 102757309 computer history. Ck722 datasheet, equivalent, cross reference search. Most interesting aspect of this small book is the datasheet archive from a. Many of the books and magazines from the mid 1950s and early 1960s, i read had circuits designed for ck722s. Like all good museums, they also have a museum store. See this image raytheon transistor applications more than 50 practical circuits using ray theon ck722 transistors. The data sheet is very important for every engineers and technicians because it can help them to find the nearest replacement for the components that they are.

The link should stay at it is an example of the hobbyist nature of this transistor armstrong11149 01. These transistors were originally sold in paper envelopes. The 2n63 is a direct electrical equivalent of the raytheon ck722 and the ge 2n107 hobbyist transistors. In the 1950s and 1960s, hundreds of hobbyist electronics projects based around the ck722 transistor were published in popular books. Transistor id help needed k72 forum for electronics. In doing so raytheon advertised these as another raytheon first. Transistor museum store construction projects point contact. Tentative data on the raytheon ck722 germanium junction transistor.

Although on semiconductors cross reference devices are functionally comparable to other manufacturers. Physicist julius edgar lilienfeld filed a patent for a fieldeffect transistor fet in canada in 1925, which was intended to be a solidstate replacement for the triode. Ck722 datasheet, cross reference, circuit and application notes in pdf format. The famous transistor cross reference book is the philip ecg semiconductor master replacement guide. Mar 11, 2010 many of the books and magazines from the mid 1950s and early 1960s, i read had circuits designed for ck722s. There seems to be lots of nos russian pnp germanium transistors around for cheap. International transistor equivalents guide american radio history. It contains a further 100 circuits, with many of them containing one or more integrated circuits ics. Transistors like 2n3055 could be equivalent to tubes like 6l6. Ck721 germanium transistors 102757308 computer history museum.

If the transistor is a pnp, then the arrow points to the base of the transistor, otherwise it points to the output. Pchannel depletion mosfets free transistor equivalent book free all. The ck722 was designed for hobbyists and ree was an electronics retail and repair outfit. The information presented in on semiconductors cross reference tool is based on our best estimate of other manufacturers published information at the time that we collected this information. This is the one stage crystal radio amplifier from page 100 of the boys second book of radio and electronics by alfred p. 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. Ive had good luck using 2n404s as ck722 subs but 2n404s have a bit more gain, etc than ck722s. Ck721 germanium transistors 102757308 computer history. Understanding transistor cross reference, equivalent.

It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. Transistor crossreference guide, listing about 5000 models of transistors by main european and american manufacturers of the time, with asiatic equivalents, if any. You wouldnt find a ck722 in any piece of consumer electronics. For me the most interesting part where the datasheets of the ck721. Even after mosfets became available, the bjt remained the transistor of choice for digital and analog circuits because of their ease of manufacture and speed. The importance of transistor cross reference, datasheet, equivalent and specification. The symbol of the transistor has an arrow on the emitter. The triode, however, was a fragile device that consumed a lot of power. This book will enable the reader to find substitutes for given transistors. A transistor may be operated in any of three modes these being known as common base, common emitter and common collector. Ck722 germanium transistor 102757309 computer history museum. Early fifties, radio shack sold their transistors in march 1953 for 7.

These transistors are all functional equivalents in differ. As with the ck722, these early ck721 units were fallouts from the ck718 hearing aid production. Its amazing what you can do with transistors but when integrated circuits came along, the whole field of electronics exploded. Further on in the boys third book of radio and electronics is this receiver. Information age education iae blog in terms of vacuum. Transistors are one of the basic building blocks of modern electronics. Look for the section hybrid automobile receivers on page 415. The ck722 holds a unique place in the history of the transistor. Buildinghomebrew archives page 43 of 62 kb6nus ham. You can always remember that the arrow points at the n material. Here are all the ck722 substitutes, found in my substitution book. By the way, the ck722 became the most popular transistor in the world, but inside every one was a reject from the hearing aid industry. The ts1, ts2 and ts3 are pnp alloyed junction transistors for the use in low frequency.

A fellow enthusiast, jack ward, has a web site devoted entirely to the ck722. More than 50 practical circiuts using raytheon ck722 transistors, for a few more factoids. Ck722 classic germanium transistor webpage and museum index. Tube ck 722 or rohre ck722 id34403, transistor, wires and audio frequency shown. A great deal of information contained in this raytheon transistor book has been made available through. Your tungsol 2n63, 2n64 and 2n65 transistors are dated for the 1950s and 1960s, as shown above. This device was introduced by raytheon in early 1953 through a series of ads in magazines designed for the electronics hobbyist, such as radio television news and radio electronics. This 50 th anniversary ck722 radio is an accurate and faithful version of these early and memorable projects. On the left is my original transistor from ree electronics, purchased in 1966. The famous transistor crossreference book is a replacement guide to philip ecgs master master of semiconductors. What would be a modern equivalent of the ck722 pnp germanium transistor.

Transistors for industrial applications forum for electronics. It seemed like the 2n35 was a popular npn transistor at the time. This transistor, shown in the image on the right, was the first massproduced transistor. This is the first transistor that i ever bought, the seekayseventwotwo and other than the 2n3904 and 2n3. Others, discontinued transistor data book 1975, scan, pdf. We are a nonprofit group that run this website to share documents.

Per jack ward, transistor museum raytheon ck721 9 pieces, germanium pnp alloy junction transistors. It is common knowledge that with semiconductors one can rarely speak of perfect. A voltage or current applied to one pair of the transistor s terminals changes the current through another pair of terminals. Jun 25, 2018 dear sir i need smd transistor and diode code book. The circuits are all from real car radios, but the focus is on the power transistor audio finals, which were still a little exotic in 1960. 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. More than 50 practical circuits using raytheon ck722 transistors keywords. Free transistor equivalent book free download as pdf file. This milestone refers to the fact that the first portable produced, the regency tr1 by texas instruments, used an intermediate frequency of 262khz because texas instruments could not produce transistors that would amplify reliably at the more. Raytheon released the ck722 and the higher specification ck721 in 1953. Diodes like 1n4148 could be considered equivalent to 6al5. In content, you can find all kinds of electronic component specifications and ic schema as well. A voltage or current applied to one pair of the transistor s terminals controls the current through.

Semiconductortransistor crossreference list peavey. It seemed like often, ck722s were paired with 2n35s in circuits. Nov 25, 2015 1955 one transistor regen using ck722 3 replies sixty years ago, the editors of popular electronics had been flooded with inquiries after one of the carl and jerry stories included a transistorized pocket broadcast receiver, in which carl and jerry commented on the size and sensitivity of the receiver. Understanding transistor circuits, august 1959 popular. It was an instant success spurring the creation of hundreds of kits and a large number of ck722 circuits over the next several years. The selectivity is very good and our local station, wnpv. Raytheon ck722 transistor introduced in 1953, the raytheon ck722 was the first commercial transistor available over the counter for hobbyists and experimenters. In the 1950s and 1960s, hundreds of hobbyist electronics projects based around the ck722 transistor were published in popular books and magazines. Ecg381 pnp 150v 7a transistor equivalent to 2sb617 2sb616. Raytheon transistor applications more than 50 practical. The thermionic triode, a vacuum tube invented in 1907, propelled the electronics age forward, enabling amplified radio technology and longdistance telephony. Inside the front cover is an aerial photograph of the home of.

This book contains no material that appeared in the first book bpi but includes all new transistors and their equivalents that have appeared. Starting with the feb 1953 issue of the radio and television news magazine, there were hundreds of ck722 project. In the content you can find all kind of electronic components specification and ic schematic too. All electronic repairers should know how to read the transistor cross reference equivalent book if they want to succeed in electronic repairs.

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. When the raytheon ck722 transistor applications book appeared in 1955, the first few pages listed radio projects that could be built with the ck722. Transistors soon cost less than a dollar and transistor projects became common in every issue of popular electronics. I can never find any cross reference info for them, however. Genuine rf transistors that make possible this all transistor 455 kc if portable. Just about any pnpge transistor will work in the place of a ck722. At least 36,000 new types of transistors have been introduced in the last two years and it is because of this that i have prepared this the second book of transistor equivalents and substitutes.

I consulted a wonderful 116 page book called raytheon transistor applications. Classic germanium transistor website and museum the ck722. Allied radios 2n107 experimenters book understanding transistors and transistor projects milton kivereditor the operating parameters of the 2n107 are similar to raytheons ck722 and many hobbyist books would use both interchangeably. K72 results 2 5512 references in database max list size 10 for. The transistors specified for the projects in this book are of two american types, the 2n107 and the ck722.

Favorite bjt transistors, sot23 and to92 equivalents i. Then they heard the first public demonstration of a fully transistor radio tuned to local stations. It is composed of semiconductor material with at least three terminals for connection to an external circuit. Hobbyists may remember the black plastic raytheon ck722 from the early 1950s, but most. This site contains my collection of vintage transistors and diodes, most of them included with their original package or sleeves. The booklet doesnt have a publication date but i believe this is from 1955.

The ck722 was what was left after all the other selections had been made. I can generally find 2n404s on the net for less than nte102s. Transistor museum store construction projects point. Variations of the circuit have appeared in numerous publications, including the widely distributed volume ii raytheon transistor applications booklet from 1957. One of the most popular of these was on page 9 a regenerative receiver, designed and built by mr. This is the second half of our transistor circuits e book. The devices are produced in the late fifties and early sixties except the mosfets from sony they where made in 1975. The oldest examples are black plastic cuboids, with a clearlyvisible small glass block in which the. The ck722 was the first lowcost junction transistor available to the general public. This page contains list of freely available e books, online textbooks and. It was a germanium pnp lowpower junction audiofrequency type at an affordable price, and it opened up the world of semiconductors to the amateur as well as the professional.

Germanium transistors are still cheap and easy to get on ebay as of 2015. 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. It is one of the must have semiconductor guide for those who love electronic troubleshooting. Ck722 germanium transistor construction projects new. Ck722, to the hobbyist market with the publication, raytheon transistor applications, more than 50 practical circuits using raytheon this 120 page document is an 8. Rare and ancient equipment dumont audio dumont seven transistor. A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. Equivalent transistor types of the time from other manufacturers would have been the raytheon ck722, the sylvania 2n34 and the ge 2n107. The electrical specs for the 2n63 are equivalent to the famous ck722 hobbyist transistor and the 2n64 exactly matches the ck721. The book is worth having, especially if your interests run to classic transistors ck722 2n1072n554 etc. Since the common emitter greatest power gain and does not.