Weve got a frys close to my work, but i dont find for example tip122 or tip36c when i do a search. Making a transistor radio parts list of course, if you had a time machine, you could visit the peter vis hardware mercantile store, and i will pack all of these items for you in a nice brown paper bag. If you install the wrong polarity, the sandwich wont work. But 8050 and 8550 seem by fit to make pushpull amplifer. This version of the oc44 is the preferred glass version. Bipolar transistors database bipolar transistors database contain more than 46000 transistor data npn and pnp transistors. Semiconductor transistor, diode, ic cross reference. How to choose a replacement for a bipolar transistor total. Download ic database equivalent guide 100 thousand components toni april 17, 2017 april 4, 2012 datasheet, download ic software database dated 2003 with database information from more than 100,000 semiconductors such as transistors and integrated circuits.
One of the larger surfaces of this germanium slab is soldered on to a metal carrier and thus forms the base. It is in the stud package used for the commercial oc16, the first mullard power transistor, which suggests that it dates from about 1956. 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. Pnp germanium alloy transistor intended as preamplifier in af applications. Second book of transistor equivalents american radio history. Saved quite a lot of money on cheapo radio designs. Transistor equivalent list 8ch pnp darlington transistor array pnp octal darlington transistor arrays equivalent transistor 2sk td62783 equivalent 2sk1078 td62783 pnp darlington transistor array td62504 equivalent text.
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. How many transistors did a transistor radio typically contain. Or a combination of the two your company is buying the 2n3904 in mass quantity for cheap and you would have to buy the 2n4401 in 100 quantity for 5x the price and it would be a new additional. Oc75 datasheet, equivalent, cross reference search. Transistor equivalents for the substitution of modern.
One of my interests is restoring vintage transistor radios. A substitute transistor must have the same polarity, either pnp or npn, as the original. My father and i operated a tv repair shop sunrise television, bay shore ny. The design of this piece gives the pedal a boost that is far less transistory in. Bipolar transistors database bipolar transistors database contain more than 46000 transistor data npn. For the pointcontact transistor a small slab of ntype germanium consisting of a single crystal and having a volume resistivity of 5. Transistor faults, testing and replacement uk vintage radio. I keep looking for equivalent transistors, and sometimes find a website that gives a list equivalent transistor. Savantic semiconductor product specification silicon npn power transistors 2. Just a work of caution, many of the transistor equivalent documents and software packages have shortcomings and i am afraid to say that in many cases they have proved to be wrong. The oc44 and oc45 used in early transistor sets tend to be reliable. Uk 240320 we have decided not to take any more orders at the moment. 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.
Located in montreal, canada, transistor software has been working with webtechnology since 1998. My father started the business in 1948 and closed the storefront in 1969. Pinball transistor equivalent chart, or how to read. Oc45 less high frequencies than previous ones, but very little leakage, therefore reliable and easy to bias, but lower gain. The apidictor was designed in the early 1950s and contained three types of transistor, each of which could be of two specified types, but none of these are in general supply as of the early 2000s. Or, point me to an article that explains transistor specifications and how to read them.
Af115, af116 these are not encapsulated black glass, but already philipsmullard to1 boxed. Transistor software specializes in the background operation of native location apis for ios and android in locationtracking applications. Smd devices are, by their very nature, too small to carry conventional semiconductor type numbers. World transistor equivalents data az by eca author 4. Look for something an npn transistor might be called an rf transistor, of course with similar or somewhat higher ft, similar or somewhat lower cob, and hfe in the same range to make it more likely it oscillates, and similar or somewhat higher pd, vceo, and ic to make sure it doesnt burn out package is up to you whether you want to try to duplicate it or not that one to106. Uk vintage radio repair and restoration transistor. Physical fabrication of transistors, from point contact to planar epitaxial. The oc45 is interesting in that it was one of the first transistors to have a low enough feedback capacitance so as not to need neutralization.
I continued repairing tvs as a part time business while completing my college education. Any orders placed through this store will not be honored or fulfilled. 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. Instead, a somewhat arbitrary coding system has grown up, where the device package carries a simple two or threecharacter id code. Original transistor type original alternative type modern substitute alternative substitute. Download ic database equivalent guide 100 thousand. This looks like the ubiquitous to18 package as used by the bc108 and similar but with a forth lead for the screen. Bu515 can be replaced with bu508, because both are used in tv horizontal deflection section. Also made by philips and related manufacturing plants. Philips described its pointcontact transistors in general terms as follows. Bf199, bf494, 2n4001, 2n4003, mpsa18 and there are all i have. Oc45 datasheet, equivalent, cross reference search. Transistor c5707 equivalent part number electronics.
If talking about the rangemaster, one has to mention the vintage oc44, a germanium pnp transistor, and the key device to retaining this excellent tone with boost. Bipolar transistors database contain more than 46000 transistor. The nte126a looks to have the same or close hfe, voltage and current specs as the oc44, so you should be ok. Tube oc 45 or rohre oc45 id33673, transistor, wires and rfifstage shown. In practice, the af125 can be used to replace af114115116.
Same qualities in treble boosters and other preamps. This article is indeed about the fabrication of transistors, but also aims to show how the development of fabrication technology proceeded from the very first transistor in logical stages, and enabled various technologies to develop into practical applications that have influenced electronic circuit design right up to. Transistor c5707 equivalent part number by jestine yong on august 25, 2008 i got lots of emails asked about the substitution part number for c5707 transistor that were used in many lcd monitors. If more than a maximum voltage rating is applied to a transistor, it can be permanently damaged. This suggests that this cxt6b may be a gpo type, probably equivalent to oc16. Looking for equivalent transistor electrical engineering. 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.
Join date jun 2005 posts 240 helped 45 45 points 4,206 level 15. This software is freeware and may be used commercially and privately for free. Pnp rca transistor, to5, 12 gold leads, mounted on stainless steel heat sink, 114 x 78 x 58h, hfe77, dc. High voltage 75v video amplifier for transistor tvs. In reality these two devices would be more accurately termed if transistors. I am searching something can replace these transistors. Hi friends i need a software or any book to find the equivalent or substitute of. At the maximum voltage, also called a breakdown voltage bv, electrons. 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.
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