Offering a matched set of three ac125 germanium pnp transistors for tone bender mkiimarshall supa fuzz. The to1 standard was the first allmetal case used for germanium transistors when the black glass models were abandoned around 1964. Yes, they were lighter and cheaper per watt than the thermionic hulks we loved so much, but they broke all the time thanks to the germanium transistor and sounded likewell, let j. Ac125 datasheet, equivalent, cross reference search. In this way the transistor regulates its own base bias by adjusting the collector voltage to suit, and was, if not still is, a common technique. Buy online discounted oc series transistors from silicon. Ac125 datasheet, ac125 pdf, ac125 data sheet, ac125 manual, ac125 pdf, ac125. General description npnpnp generalpurpose double transistors in an sot457 sc74 plastic package. Ac datasheet pdf germanium small signal transistors gpd optoelectronic devices.
The rca transistors and semiconductor diodes brochure from 1957 contains an introduction on semiconductor physics along with detailed specifications on germanium pnp transistors and a few semiconductor diodes 1n34a, 1n38a, 1n54a, and 1n58a, dimensional outlines, an interchangeability directory, and example. Irf520p to220 nchannel power mosfet rf final and en369dr companion part. Oc25 germanium pnp transistor in a to3 case by mullard. Home electronic parts semiconductors transistors germanium transistors ac128. Ac128 transistor datasheet pdf ac datasheet pdf download germanium small signal transistors, ac data sheet. 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. Germanium small signal transistors, ac125 datasheet, ac125 circuit, ac125 data sheet. This amplifier can deliver a maximum of 3w into an 8. My philips ac125s are higher gain if thats what you need. Germanium small signal transistors, ac128 datasheet, ac128 circuit, ac128 data sheet. Application notes common usescase packagedatasheet. Ac125 datasheet, ac125 datasheets, ac125 pdf, ac125 circuit.
Most germanium transistor production ceased in the 1970s in favor of silicon which are more stable, consistent, have higher gain, and lower leakage. Ac125 datasheetpdf list of unclassifed manufacturers. Information source collector info sammler ktt 196970, tvt 1979 eca. Germanium small signal transistors germanium power ac184 ac123 ac125 germanium germanium ac germanium power devices ac125 text. Ac125 datasheetpdf 1 page list of unclassifed manufacturers. Af106 datasheet pdf 5 page siemens semiconductor group. Af106 datasheetpdf 5 page siemens semiconductor group. The sensation of warmth is about equivalent for analog reasons, in particular the miller effect that dynamically attenuates the high frequencies. Gain range is 60, so they are right in the fuzz face range. Mouser is an authorized distributor for many transistor manufacturers including diodes inc. Ac128 ac128 transistor transistor ac128 ac128 datasheet data sheet of transistor ac128 ac128 transistor datasheet ac128 transistor images mc9s08ac128 datasheet ac128 demo51ac256kit. Etc1 germanium small signal transistors,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. The column marked case is the outline of the transistor case.
Ac128 datasheetpdf list of unclassifed manufacturers. Nos new old stockplease note, some of these are very early and heavy, these have a thick 3mm thick flange with indent and e, b stamp. Ac125 germanium small signal transistors components datasheet pdf data sheet free from datasheet data sheet search for integrated. The ac128 is a great sounding germanium transistor but if you buy many of them, there will be a large number left over that have too much baseto. It seems stock of these is rapidly dwindling worldwide.
It is not hifi and i would not recommend it for design into a new commercial product. Ac125 datasheet germanium small signal transistors. Bc817dpn npnpnp general purpose transistor 27 november 2019 product data sheet 1. Ac datasheet, ac pdf, ac data sheet, datasheet, data sheet, pdf, gpd. Transistors are in stock with sameday shipping at mouser electronics from industry leading manufacturers. You will need to buy one of item ge transistor testing fee in the germanium.
Ac125 datasheet14 pages etc1 germanium small signal. The first germanium transistors that i encountered as a kid were the glassencapsulated ocxx types oc44, oc45, oc71, oc81d, oc81, etc. Im working on a guitar pedal that calls for a ac128 germanium pnp transistor and i was wondering why i might not want to just get a modern equivalent. Others, shortform transistor pdf datasheet, scan, pdf. Ac125 datasheet, ac125 pdf, ac125 data sheet, ac125 manual, ac125 pdf, ac125, datenblatt, electronics ac125, alldatasheet, free, datasheet, datasheets, data sheet. It is especially suitable for guitar amplification, and can apply to harp and some keyboards. The transistors are from a sealed bag from the 1970s and are gain matched and checked for proper leakage with a peak atlas dc55 transistor tester, and checked in circuit in one of my test pedals. Circuit diagram of 3w audio amplifier using ac187ac188 pair. Bfu768f npn wideband silicon germanium rf transistor nxp. M s materialsort c complementary transistor npnpnp og dual germanium transistor oj dual junction transistor os dual silicon. Ac128 datasheet, equivalent, cross reference search. You could buy a fuzz face combo or maybe there are fuzz factory combo packs available. Any germanium pnp will technically work, though there are suggested gain hfe values for both. Germanium small signal transistors pro electron types type polar ity vc.
The case drawings are shown at the bottom of the page. The sound of germanium has a warmth and a granulity as pleasant to the ear as the tube sound, without being the same. Fully tested with a peak atlas dc55 and sorted for gain, compensating for leakage. Printable version ac128 ac 128 getransistor pnp 32v 1a 1w to1. They are a direct substitute for oc81d and work great in fuzz pedals. This concerns european series like acs, industrial series acys, asys, aszs, the british nkts and the japanese 2sas. Ac125 datasheet pdf 1 page list of unclassifed manufacturers.
Liven up your fuzz face, pimp your fuzz factory, wrangle your rangemaster. Although i do not play guitar, there is a forum called diyaudio, maybe they have some germanium transistor spice models for this particular type of fuzz simulation. Germanium has slightly different characteristics from silicon. Ac128 germanium transistors transistorsics lowleakage pnp germaniums perfect for all your fuzzy desires. Those of us who cut our engineering teeth on tubes still remember the advent of the solidstate amplifier with mixed feelings. Ac128 datasheet germanium small signal transistors. Besides being in the famous original fuzz face, the ac128 was used in numerous domestic electronic appliance, and certainly one of the most common european transistor. Etc1, alldatasheet, datasheet, datasheet search site for electronic components.
Pnp germanium alloy transistor for af low power amplifier applications. Ac125 datasheet pdf, ac125 data sheet, ac125, ac125. Ac125 pdf, ac125 description, ac125 datasheets, ac125 view. This project originated as an experiment in how to use the germanium transistors that are left over when sorted for leakage and gain. But many people to this day favor germanium transistors in fuzz pedals because of their tone, and because they want to recreate fuzz tones of their favorite players who used germanium fuzzes. Text in other languages may differ dimensions whd incl. Ac127 datasheet, equivalent, cross reference search. Gordon holt tell us what they sounded like in an as we see it. Ac188 germanium ac2 ac188k ac188 ac187 ac125 ac181 germanium small signal.
Cases gec mazda stc aei hivac newmarket texas transistors. A discrete 3w audio power amplifier circuit is shown in figure 1 employs a complementary output stage featuring the ac 187ac188 t 3 and t 4 germanium output transistor pairs. Features and benefits reduces component count reduces pick and place costs aecq101 qualified 3. Germanium transistors the following table lists the parameters for germanium transistors. You could also experiment and get a sound you like that goes beyond the standard.
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