30% of value production, 25% of physical production, ie tens of millions of components. Thus, it was exported, without confrontations with quality problems or complaints, approx. But the guaranteed quality of IPRS products has created the necessary conditions for the sale of these components on the foreign market as well. The export was permanently conditioned by the assurance to the greatest extent of the internal necessities. IPRS was created in 1962 and has provided over time the components necessary for the development of the industry of professional equipment, automation and computer technology, primarily for the development of the industrial branches of Romania. Production of transistor 2N2222 at IPRS Baneasa Since then it has been made by many semiconductor companies such as: ITT Semiconductors, CRP Industries, IPRS Baneasa, National Semiconductor etc. 2N2222 is a very common electronic component, meaning it has a general use.ĢN2222 belongs to a family of devices described by Motorola at a convention IRE (Institute of Radio Engineers) since 1962. The NPN 2N2222 transistor is used in applications that require amplification of low currents and low or medium voltages. Yeah, you could spend 4 more hours going through every transistor Mouser stocks to get a tiny edge in tone, but in real life music playing situations that little difference is pretty meaningless.Reading time: 2 minute When did 2N2222 appear? I think that you start reaching diminishing returns when you're swapping out different transistors trying to find the perfect one. There are obviously bunches of other devices in each category, but these have been more than enough to keep me busy for years. MPSA13 (this is a darlington - 2 transistors strapped together - but it is interchangeable with the other transistors if you want much higher gain) Just off the top of my head, the transistors in each of these categories are freely interchangeable with each other, as long as you have the right pinout: Of course if you work with this for just a little while you'll begin to memorize the different common types and what they're good for. If a transistor is identified as NPN or PNP, that means it is bipolar. Otherwise you can look at terminology in the datasheet. If the datasheet has the circuit symbol, just look to see what kind of transistor it represents (you can find this info on google). Since most datasheets won't come out and tell you whether a transistor is bipolar, jfet or mosfet, there are a few tricks you can use to figure it out. We're not putting transistors through too much strain, so their characteristics at the edges of operation are not too important. As an amateur, pinouts are probably the most important info you get from a data sheet.īeyond that, gain is really one of the only bits of technical data on the datasheet that most stompboxers are going to care about. The things to watch out for are polarity (NPN v. Do you want higher gain, lower noise, different sound? Generally any bipolar transistor will be interchangeable with another bipolar, jfet with jfet, mosfet with mosfet, etc., they'll all just give you slight variations in tone. I guess the question is what you're trying to accomplish by switching transistors.
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