Weird / Unusual Looking Components. - Page 1
Forum section: electronics / general

author: Refrigerator
author_rank: Super Contributor
timestamp: December 28, 2014, 08:40:37 pm
content: So the other day i decided to tear down some vintage electronics and found some rather unusual looking components.Some transistors ( TO-92 for scale ).As well as some diodes ( 1N4148 for scale ).The square orange ones are actually zeners, yet instead of having a low breakdown voltage they have a high diode voltage drop and standard diode breakdown voltage.If you guys want i can post some more unusual component packages.Maybe you guys have something to show ?Cheers.

author: tautech
author_rank: Super Contributor
timestamp: December 28, 2014, 08:53:30 pm
content: Neat.Not seen any flat transistors like those before.Or diodes/zeners like those.Please post more.I'll have a hunt through my old stuff.........

author: mzzj
author_rank: Super Contributor
timestamp: December 28, 2014, 09:04:07 pm
content: Ex-USSR components? You can find really weirdo stuff in ussr electronics.

author: rob77
author_rank: Super Contributor
timestamp: December 28, 2014, 09:10:51 pm
content: definitely old Russian stuff from the '80 - those 3 flat transistors on the right side definitely Russiani do remember those very wellthat flat circular package visible in the middle was common for RF transistors back in the days, and there is no comment needed for the TO92 and the metal can on the leftthe unusual diodes on the second picture are definitely russian as well...actually those parts might have been manufactured also in other countries of the Eastern blockbut the style of the packages is definitely from Russia.

author: Refrigerator
author_rank: Super Contributor
timestamp: December 28, 2014, 10:10:37 pm
content: The middle one is actually a triode mosfet, functions the same as a standard mosfet but has two independent gates.I have some more components to show, i'll post them tomorrow.

author: rob77
author_rank: Super Contributor
timestamp: December 28, 2014, 10:58:09 pm
content: Quote from: Refrigerator on December 28, 2014, 10:10:37 pmmosfets with 2 gates are common in RF even today - second gate to control the gain of the amp - that's why it has 4 leads on the picture. an example of a more recent dual gate RF mosfet is BF998 .

author: Bud
author_rank: Super Contributor
timestamp: December 28, 2014, 11:43:48 pm
content: Quote from: rob77 on December 28, 2014, 09:10:51 pmKT315 series and its complementaryhttp://en.wikipedia.org/wiki/KT315QuoteMost likely varicap diodes

author: Refrigerator
author_rank: Super Contributor
timestamp: December 29, 2014, 03:06:48 pm
content: Yup, those russians seem to have quite some unusual components going on.This one for example, i have no idea what ir is, but is is polarised.Then there's this little bugger ( with four leads ).For a long time i thought these were resistors but they turn out to be capacitors !Some more caps.An then there's this IC ( looks nice though ).Some more unusual ICs, i'll let you guess what they do.A rather tiny oscillator crystal, next is a more standard sized crystal.Maybe you guys have anything to show or am i the only one to come around these?

author: wraper
author_rank: Unknown
timestamp: December 29, 2014, 07:39:25 pm
content: Selenium stabistor465kHz SAW filterKT-2 capacitorsQuoteK"C"407 Diode bridges, note that "C" is approximately how it is pronounced in Russian, not actual letterEEVBLOG do not support cyrillic letters

author: wraper
author_rank: Unknown
timestamp: December 29, 2014, 07:50:17 pm
content: SS9014, KT316* (last digit likely 6), KT3109*,, KT361*, KT315*, KT315*. There are suffix in "*" place, did not write it for last 3 transistors because of Cyrillic letter. Last transisor is of special kind, probably for retail sale. There is price on it, "C"20K (kopeks). "C" abbreviation for price.

author: iampoor
author_rank: Frequent Contributor
timestamp: December 29, 2014, 08:41:21 pm
content: I actually use the KT315 transistors in a guitar effects box Im currently working on producing.

author: wraper
author_rank: Unknown
timestamp: December 29, 2014, 09:03:55 pm
content: I made some USSR parts photos too. You can look High res photos herehttp://imgur.com/a/FxUCs#0(should click on gear and select "view full resolution")There are 3 non Soviet transistors in TO-3 case on the right bottom corner.

author: free_electron
author_rank: Super Contributor
timestamp: December 29, 2014, 09:27:33 pm
content: definitely russian stuff. how can i tell ? the red paint is a dead giveaway ....Russion components are like Ford model-T. they are avaialble in any color as long as it's red.that why MIR was such a problematic vessel. when they had electrical problems. good luck finding the right red wire ...

author: Refrigerator
author_rank: Super Contributor
timestamp: December 29, 2014, 09:40:46 pm
content: @iampoorSame here, i'm actually building a guitar amp with those yellow transistors as well as a K174YH17 amp ( TDA2003 equivalent ), actually i'll may as well use all the vintage parts i can.@wraperThose TO-3s remind me of something, i have some transistors, bigger than standard TO-3 and without fins on the sides, i'll see if i can find them.

author: wraper
author_rank: Unknown
timestamp: December 29, 2014, 10:03:06 pm
content: Quote from: Refrigerator on December 29, 2014, 09:40:46 pmActually K174YH14, I have one on photo.QuoteI have those but at another city at my parents home. Think I should have bunch of Soviet germanium transistors at the same place if didn't toss them. Oldest Soviet transistor I had was made in 1953 or 1954 IIRC.

author: xrunner
author_rank: Super Contributor
timestamp: December 29, 2014, 10:17:02 pm
content: Vintage Transistor found in an old parts bin -

author: tautech
author_rank: Super Contributor
timestamp: December 30, 2014, 07:47:57 am
content: Bit of stuff I had tucked away:From top leftFuji 100 A 1200 V Dual IGBT moduleMotarolla Dual Diode module SBR5455-1IR 150 A stub diode 150L20A15K 10% carbon resistor 2W ?120 R 5 W resistor (blue)BC547B for Scale (next to Fuji top image, horizontal bottom image)BC418BTransistor? marked 948 2412N3569 White Ceramic body, black top2N3642 Brown Ceramic body, black topAC128/01 square bodyOC16 Stud mount transistor & mounting HWAnd lastly someting you don't seee these days: a multi value ElectroyliticThis one has 4 values: 200 uF, 100 uF, 50 uF and 25 uF.Temp rating for voltage:70C 300V, 30C 370VNotice the Neg tag on top of the caseI have no idea what I pulled it out of now or even how it was fastened but probably an old valve TV.

author: Refrigerator
author_rank: Super Contributor
timestamp: December 30, 2014, 01:31:49 pm
content: Nice collections you got there guys!

author: rob77
author_rank: Super Contributor
timestamp: December 30, 2014, 02:20:44 pm
content: for young players even these metal cans might be unusuali sourced them brand new back in the '90s and i never used those 4 pupies on the picture (what a shame !) - the 748 opamps are a bit rusty but the 741 opamp and 723 voltage regulator are shining like newbtw.. those ICs were produced by a local company TESLA back in the '80.

author: SeanB
author_rank: Super Contributor
timestamp: December 30, 2014, 05:42:05 pm
content: Still have a pack of those TO100 cans, with 741 opamps and 555 timers in them.

author: Refrigerator
author_rank: Super Contributor
timestamp: May 15, 2015, 05:00:25 pm
content: Just found another rather interesting package.By the "e", "c" and "b" letters on the board it must be a transistor but this one is quite tiny.

author: iampoor
author_rank: Frequent Contributor
timestamp: May 15, 2015, 07:51:53 pm
content: Kt312 comes in that package