Af117 transistor equivalent software

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. The af12 transistors are much smaller though so if authenticity is essential then try and repair first. Electro tech is an online community with over 170,000 members who enjoy talking about and building electronic circuits, projects and gadgets. This little seven transistor radio has long medium and short wavebands as well as a band spread facility for the higher frequency end of the medium waveband this radio is from the era when radio luxembourg on 208 metres was popular. Very gently use of a small, soft and clean artists paint brush is ideal for this. Af127 magnatec af127 pnp bipolar transistor, 10 ma, 32 v. A mosfet is by far the most common transistor in digital circuits, as hundreds of thousands or millions of them may be included in a memory chip or microprocessor. In the germanium transistor era, the rf transistors were pnp small signal devices. This transistor has a low collector capacitance and has excellent gain up to several megacycles. Perhaps on some batches of af117 the tin plate on inside was too pure and too thick. Substituting silicon transistors for germanium all about. The best equivalent transistors are the af12x series that are the same piece of. Hello friends, i hope you all got benefited with our previous article on electronic circuit drawing softwares today we are bringing you a great collection of circuit simulators which are at the same time can be used.

Pc max ucb max uce max ueb max ic max ft max cctip pf hfe tj euro equivalent, usa equivalent, ussr equivalent, japan equivalent. Af117 datasheet, af117 pdf, af117 pinout, equivalent, replacement transistor etc, schematic, circuit, manual. Uk vintage radio repair and restoration transistor. Although on semiconductors cross reference devices are functionally comparable to other manufacturers published information, we. Af117 replacements uk vintage radio repair and restoration. Although on semiconductors cross reference devices are functionally comparable to other manufacturers published information, we recommend. The germanium af11x transistors and in particular the af117 are a constant. The type numbers include af114, af115, af116, af117, oc170 and oc171. I replaced an af114 and an af117, dismantled the metal box and bent a. Vintage electronic parts electronic components source. This app will guide you to know, choose, select and design your next board masterpiece using that transistor you werent remembering.

Im not familiar with those gt numbers but i have used af117 as a oscillatormixer. In this icdatabook software you will find pin assignments, connection layouts, function tables and the most important specifications available for the 40x and the 74x ic series. List of circuit design analysis simulation software. Af114 datasheet, equivalent, cross reference search. Recent listings manufacturer directory get instant insight into any electronic component. Af117 datasheet, af117 pdf, replacement, equivalent, data sheets, af117 pinout, schematic, circuit af117 datasheet search system, distributor. 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.

It has been shown that these were caused by hairlike whiskers growing out from the metal casing of the transistor into the internal workings. I picked this little stella transistor radio from around 1962 up at a amateur radio rally for. I was then able to remove the la4160 equaliserpower amplifier chip and fit an equivalent ka22. 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. Tapping the uppermost af117 got it working, but only temporarily. Due to the method of construction employed in the manufacture of these transistors, together with the fact that they are now. The driver is currently an ac128, and likewise the two output transistors. The alloydiffused af114, af115, af116 and af117 transistors were.

The metal can was isolated and the 4th lead was called the screen and was connected to an internal screen. The internal appearance of one these transistors is shown in figure 8. Iam searching for the equivalent of d965 transistor. Two audio driver transistors were very leaky and below par. Af117 datasheet, equivalent, cross reference search. In the uk, many transistor radios of the 1960s used af117 transistors in the rf stages. I replace these with equivalent af12 transistors which dont suffer with this problem, the af127 is the identical spec to the af117 and an af125. I was wondering if anyone could help me locate a way to find substitutions for the following germanium transistors. The current software version includes the data of more than 230 different ics. Stenning contacted engineers at nasa goddard to share images of metal whiskers found growing from the inner package walls of oc170 type transistors. The alloydiffused af114, af115, af116 and af117 transistors were introduced in the early 1960s. Measurements 2015 british vintage wireless and television. Common european example part numbers of such devices are. Bipolar transistors database bipolar transistors database contain more than 46000 transistor data npn and pnp transistors.

I have been told by a good authority that the af239 transistor is a good replacement for the troublesmome af117. About 7 to 10 thousand transistor bars can be cut from each ingot of germanium. In any case not all af117 fail and failures of earlier transistors and later af127 seem rarer. The long black tubular one is also a replacement, an oc45.

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. With the back off, i tapped the cases of the af117 transistors with a screwdriver. 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. The oc45 and equivalent similar devices from other manufacturers were the first types of transistor to have widespread use in if amplifiers. Af116 datasheet, equivalent, cross reference search. Diodes and transistors pdf 28p this note covers the following topics. Antique radio forums view topic olson super micro transistor. There is an af118, but this is not found in transistor radios its a high voltage transistor intended for use in video circuits, but it is occasionally found elsewhere for example, the leak stereo 30 hifi amplifier. Semiconductor transistor, diode, ic cross reference. Since they can be made with either ptype or ntype semiconductors, complementary pairs of mos transistors can be used to make switching circuits with very low power consumption, in.

The alternative method is to measure the voltage across a resistor inserted into the circuit. Bipolar transistors database contain more than 46000 transistor data npn and pnp transistors. Some of these small metal cased bjts had 4 leads instead of the usual 3. Electronic circuit design and simulation software list. Id like to convert a circuit to silicon if possible. Af117 cross reference electronic circuits, tv schematics. Bipolar transistors database contain more than 46000 transistor. A fast and simple test to see if the mosfet is blown. Smallsignal transistors replacement list bc337a bc337 equivalent type bc338 bc337 bc33816 bc33716 bc33825 bc33725 bc33840 bc33740 bc36816 bc63516 bc36825 bc63516 equivalent type bc547a bc546a bc548 bc547 bc548a bc546a bc548b bc547b bc548c bc547c bc549 bc547b bc549b bc547b bc550 bc547b bc550b bc547b bc557a bc556a bc558 bc557 bc558a.

November 2005 nasa electronic parts and packaging nepp program tin whiskers growing inside 45 year old af114 germanium transistors parts analysis by. These have metal cans and four leads the fourth lead being connected to the can for screening. Top results 6 part ecad model manufacturer description. Buy magnatec af127 pnp bipolar transistor, 10 ma, 32 v, 3pin to72 af127. I replace these with equivalent af12 transistors which dont suffer with this problem, the af127 is the identical spec to the af117 and an af125 or af126 will work fine as well. Af117 type transistors are notorious for developing internal short circuits between the case connection and one of the other connections. Draf114y silicon pnp epitaxial planar type for digital circuits complementary to drcf114y dra3114y in ml3 type package features package low collectoremitter saturation voltage vcesat code contributes to miniaturization of sets, mount area reduction ml3n4. The russian germanium part i purchased to replace af117 has no goo inside. Uk vintage radio repair and restoration transistor radio. Af117 transistor datasheet, cross reference, circuit and application notes in pdf format. Cross reference electronic circuits, tv schematics, audio. Add to cart international transistor equivalents guide 1. Germanium complementary transistors power output, driver description. Tin whiskers growing on internal walls of transistor can vintage radios this anecdote describes how collectors of vintage radios have combated the electrical shorting malfunction of certain transistors utilized in a variety of collectable radio sets.

By far the most unreliable transistors are the af117 series used in the rf and if stages of many transistor radios produced in the 1960s. Transistors handbook for ios free download and software. Articles transistors in vintage radios marks pages home. This product complies with the rohs directive eu 200295ec. Over the years, these transistors and others in the af series have failed because of internal short circuits. By far the most unreliable transistors are the af117series used in the rf and if stages of many transistor radios. 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. As many members will know, af117 and similar transistors such as af115,116, and oc170171 were used in a great many british made. Af11x transistors, tin whisker problems and solutions. Incidentally, alloydrift transistors tend to be noisy at low frequencies and as such are not generally suitable for audio circuits. Snip the legs of the replacement transistor just enough to allow that. Then a transistor with no series emitter resistor and its base biased at 0.

Tin whiskers growing inside 45 year old af114 transistors. Create a project open source software business software top downloaded projects. Transistor development continued, and the next family of devices, the af117 and equivalents, used a different manufacturing process that reduced the internal capacitance, eliminating. In this case, before fitting a replacement transistor, check the associated bias components, coupling and.