Oc44 transistor equivalent books

Mullard data book, 19734, mister transistor and other websites see references. I show three examples, one in classic gec lowpower encapsulation, one in a mullard so2 glass can, and a third in a short so2 or to1 metal can probably made by texas instruments uk. Download ic database equivalent guide 100 thousand components. Ive quoted figures from a mullard data book published in 1979. The ec10 used an allgermanium pnp transistor lineup that shared many circuit design elements. 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. Uk vintage radio repair and restoration transistor. Sn76477 2n4401 free transistor equivalent book semiconductor data handbook mj802 2n3866 s2p tis43 bc149c xr2206 application notes lm1 siemens transistor manual text. 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. In practice, the af125 can be used to replace af114115116. Articles transistors in vintage radios marks pages home. For the pointcontact transistor a small slab of ntype germanium consisting of a single crystal and having a volume resistivity of 5. Download book 200 transistor circuits talking electronics. Glass technology had been selected because at that time plastics were still unable to ensure a perfect seal between case and terminals.

Keep in mind that germanium transistors vary a good deal. Langwellenbereich gf105 af101 oc44 oc6 97 99 99 99 p404 p406 p408 97 97 98 2sa15 2sa354 2sa16 2sa73 98 88 98 98 23. Free transistor circuits books download ebooks online. In this germanium triangle that is the royal blues oc44, you can pick which of your favorite fuzzes to own with a mullard oc44 in it. This transistor has a low collector capacitance and has excellent gain up to several megacycles. In this case, before fitting a replacement transistor, check the associated bias. The best equivalent transistors are the af12x series that are the same piece of germanium, but mounted in a to72 case. The cv7003 is a lowpower germanium pnp switching transistor equivalent to the gec type get874, the mullard type oc44 and the stc types tk31c and asy55. Unfollow oc44 mullard to stop getting updates on your ebay feed. Oc44 transistor pnp oc45 transistor pnp oc71 transistor pnp two oc72 transistor which are a matched pair. Also in 1956, mullard announced the oc44 and oc45 transistors, the latter seems to be described all over the web as the first rf transistor, although i think this only applies to europe. I highly recommend the geofex article on the rangemaster. A good ac128 may sound much better than a bad oc44.

This remarkable photograph shows an oc44 that was found in a radio at some. The oc44 and oc45 used in early transistor sets tend to be reliable. Switch at its most basic, a transistor is a switch. Transistor equivalents for the substitution of modern. Sn76477 2n4401 free transistor equivalent book semiconductor data handbook mj802 2n3866 s2p tis43 bc149c xr2206 application notes lm1. Oc44 ad149 asz16 siemens transistor asy 27 af124 asz15 gd241 transistor gc301 ac125f. The transistors used in are oc45 and oc71s ive got hold of the 71s, but am having real trouble trying to find a source for the 45s. The best equivalent transistors are the af12x series that are the same piece of. Oc44 datasheet, cross reference, circuit and application notes in pdf format. Should you find any info that can fill in any of the blanks in the matrix below. Many of,the circuits in thij book make use of the ocl69. The alloyjunction oc44 45 types were used in early am radios, but were quickly replaced by the infamous af117. Whe n two resistor values are given, the first is the series base resistor, and the second the resistor between base and emitter. Many uk transistors and diodes, including early types whose manufacturer is.

Choosing transistor replacements electronics notes. Others, discontinued transistor data book 1975, scan, pdf. Transistor equivalents for the substitution of modern transistors in elderly projects. Oc44 datasheet, equivalent, cross reference search. I recently got a book called the radio constructor in which are a lot of radiobuilding projects. Were given a nononsense introduction to the device, told about its package, pinout, and schematic diagram. Transistor equivalent book pdf free download by corfikome. Im in the process of acquiring components to create a fuzz factory as my first diy pedal. The following diagram and paragraph are taken from the book electronic classics. The first germanium transistors that i encountered as a kid were the glassencapsulated ocxx types oc44, oc45, oc71, oc81d, oc81, etc. 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. The latter types listed were often further encapulated in an aluminium can for improved heat dissipation the oc81d was often used as a driver ahead of an interstage phasesplitting transformer, and a pair. 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.

Is there anything available to see if a particular transistor can be replaced with a different one. About 7 to 10 thousand transistor bars can be cut from each ingot of germanium. One of the larger surfaces of this germanium slab is soldered on to a metal carrier and thus forms the base. If not, it can usually be obtained from transistor data books. Data on many transistors is available on my valve data cdrom.

Cases gec mazda stc aei hivac newmarket texas transistors. The oc44 45 transistors were the first generation of germanium rf transistors commonly available for hobby use in australia, if you dont count the old top hat ediswan xa101 etc. Any replacement transistor of the same type, whether used or newoldstock, will have. The original book used germanium transistors from the mullard oc series, oc71s and an oc44. Transistor semiconductor history texas instruments rca bell laboratories western a connection to the base layer were demanding and largely manual processes. Each one of these builds has as its most prominent feature the oc44. The secret to making these pedals sound good is biasing the transistor. Digital transistors dtr these are transistors with built in resistors.

Diodes and transistors pdf 28p this note covers the following topics. Customize an aluminum enclosure to house your effect pedal with services such as. 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. Afif amplifier that my data books state is equivalent to the gec type get114. The ac128 sounds different but good in its own right. High voltage 75v video amplifier for transistor tvs. The links at left may help you to research your own replacement transistors.

Vrt comparison table for semiconductors from a to z. Others, shortform transistor datasheet guide, scan, pdf. 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. Not using a kit, im going to use my partial electrical knowledge to create this from scratch first on a breadboard. Being an audio output transistor roughly equivalent to a mullard oc72, it wasnt too hot as an rf transistor. The next generation was the af114115116117 and the oc169170171. Philips described its pointcontact transistors in general terms as follows. Pedal parts plus has the finest effect pedal parts available for the boutique builder or diyer. A system of classification derived from the practice and method of collaboratively creating and managing tags to annotate and categorize content. The test relies on the fact that a bipolar transistor can be considered to comprise of two back to back diodes, and by performing the diode test between the base and collector and the base and emitter of the transistor using an analogue multimeter, most of the basic integrity of the transistor can be ascertained.

The internal appearance of one these transistors is shown in figure 8. However, since this book was written in 1963 i cant find any of the parts online. In reality these two devices would be more accurately termed if transistors. Another point to watch is that equivalent books list the af239s as a replacement for the af11x range. The column marked case is the outline of the transistor case. My pocket money didnt extend to the oc44 s at one pound ten shillings and sixpence each from roly thomass balmoral radio and tv store but i did save enough to get an ediswan xb102 from direct disposals at ten shillings and sixpence. Does anybody have any suggestions where i might get hold of some 2.

Download ic database equivalent guide 100 thousand. Get the best deals on nkt transistor indiana transistors when you. This is a pdf format of the well known hardware pinout book, which covers various computer, electrical and electronic item pinouts. Some of the transistors are types with integrated resistors.