#311 TRANSISTOR MPS FREE#

Make a search at aliexpress or ebay to find them. (Must measure ICE0 parameter! It's leackage). Sure, Peak DCA55 (and DCA75) measures germanium transistors and leackageĬhina clones (МК-168, MK-328, GM328A) of German Atmega based transistor tester. Subtract 'full' Hfe and leackage and get 'real' hfe. (It's in Russian so in a nutshell: insert collector and emitter (base is not connected!) in transistor socket and measure hfe (it's leackage). Simple method using usual multimeter like DT830 I'd say it a little bit more noob friendly (I mean his test rig). More info from Steve Daniels, Small Bear Electronics LLC In two words - germanium transistors has emitter-collector leackage and when we measure them with usual multimeter it's not taken in a result). Keen with his method of measuring and why it is so important Sure the first link everybody knows from R.G. Nothing new, but a good place for noob to start. So let it be not a flood I will add some links here.

#311 TRANSISTOR MPS FREE#

PS: Feel free to fix my mistakes, and add notes. Some of them have сomplementary types: ГТ402 (pnp) and ГТ404 (npn). Many of them hard to find even in Russia (like popular ГТ402И (GT402i) which is good choice for Fuzz Factory clones). The letters are given to distinguish them by Hfe, max collector-emitter voltage (like ГТ402Б (25V) and ГТ402И (40v)) etc Low noise GE transistors: МП13Б, МП39Б suitable for first input stage. Low noise GE transistors: П27, П27А, П27Б, П28 suitable for first input stage. Many of them (not all) have 1T version, wich is the same but selected, graded version, sometimes even with mentioned in datasheet higher Hfe) Numbers after letter - number of design and specifications. Next appears silicon transistors - their names starts with KT (english KT) and 2T (graded version, military etc, in russian tradition - '5' ('military') acceptance).Įxample of KT transistor is famous sub for 2N5088: russian KT3102E with hfe 400-1000 used in russian BigMuff's. Sometimes even usual ge transistors (П, МП, ГТ) have a rombus marking - OTK marking or military grade, selected version. Russian letters (as it goes in Russian alphabet):Įtymology of names: russian letter П (english P) meant transistor (полупроводник), it's early tradition from 60-s, next - МП (english: MP), modernized transistor, and ГТ (GT) and 1T (1T) germanium transistor (tradition of naming based on transistor material).ġT (not IT!) is a kind of grade (military grade, slected etc). Here is my list (name, original name, hfe according to datasheet)

311 transistor mps