2n2222a substitute?

[stripes]

building something with this transistor, and they don't have it on mammoth or ppp. can i sub it for something else without a significant difference in sound?

[TweedBassman]

the 2n2222a is the TO-18 metal can version. I bet most places have the TO-92 plastic version, the P2N2222. try looking for that. Note that the EBC of the metal can is a different pin out than the TO-92 so if it's a pre-made board you may need to cludge it in there.

[Dr Satan]

Mouser has 2n2222a transistors. As for substitutions, 2n4401 and 2n3904 are in the same ball park.

[Bellyheart]

2n3904 seems to be close.

http://beavisaudio.com/techpages/Transi ... /index.htm

Good readout reference

[eatyourguitar]

you want PN2222 trust me

[stripes]

just ordered these off ebay ... yay?

http://www.ebay.com/itm/400328132700?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

[eatyourguitar]

Code: Select all

Product Features
Manufacturer Part No: 2N2222A
Package / Case: TO-92
RoHS: Yes
Transistor
Transistor Type:NPN
 Features: General Purpose
 Current Rating:0.8A
 Voltage Rating:40V

Package included :
10 x Transistor MOT/ON TO-92 2N2222 NPN 40V 0.8A

you got the china special. I told you to get PN2222. the only difference between 2N2222 and PN2222 is that PN2222 is a TO-92 package like what you want like the picture in the auction. it raises more question that what you purchased actually has the incorrect part number for the package that it is in. the the inner workings of a real 2N2222 and a real PN2222 are %100 identical. the description says right there "MOT/ON" meaning these no-name transistors are clones or substitutes for any 2N2222 or PN2222 made by Motorola or ON Semiconductor. we can guess that these were probably not from a large factory cause they are missing a 3 digit batch code. they have instead a 1 leter batch code "H".

long story short... will they work? probably yes. this is for a fuzz pedal. anything will work in a fuzz pedal. just don't expect them to go up to 100Mhz (ON semiconductor 2N2222) or 300Mhz (motorola 2N2222)

http://www.onsemi.com/pub_link/Collateral/2N2222A-D.PDF

I use fairchild PN2222 or PN2222a. you can get them as cheap as you want from tayda electronics with very cheap shipping.

http://www.fairchildsemi.com/ds/PN/PN2222.pdf

[stripes]

okay, i got these now. and if i fucked it up this time i'll make my next component order from tayda.
http://www.ebay.com/itm/230924157878?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

[morange]

Ebay is a pretty terrible place to order electronic components. I have some lovely fake PT2399's, and a shitty breadboard that doesn't work right and smells like something toxic. They can forge any manufacturer marks, so you really don't know what you're getting. I recommend mouser, newark, pedal parts plus, smallbear.

[Dr Satan]

Just checked Mouser and holy hell the price on 2n2222A has skyrocketed since August 30 2012. The ones I got, 511-2n2222A made by ST are $1.26 a piece now, compared to $0.41 in August of last year. Holy price hike, Batman!

[eatyourguitar]

okay, i got these now. and if i fucked it up this time i'll make my next component order from tayda.
http://www.ebay.com/itm/230924157878?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

thats probably a not a fake. USA seller, the markings on the can look correct. so yes you did good but your also paying a lot more just to have it in a TO-18 metal can compared to the cheaper TO-92 black plastic package. I don't think they even make those metal can 2N2222 anymore but I could be wrong. all the metal can 2N2222 I have are made by ST also. just to show you how cheap these newer version PN2222 are, I added 93 of them to my cart + shipping and it was $5.78 total on tayda electronics. I like the idea of using parts that are still in production if I am going to build a lot of something. that way I can keep the product consistent year to year.

[McSpunckle]

I always thought the 2N3904 was basically a lower current 2N2222. But I've never tested it. I don't experiment with transistors much.

Either way, you can get like 100 PN2222As on Mouser for like 12 bucks. You can get 100 2N3904s for half that or less, but it's just not much money.

[eatyourguitar]

I always thought the 2N3904 was basically a lower current 2N2222. But I've never tested it. I don't experiment with transistors much.

Either way, you can get like 100 PN2222As on Mouser for like 12 bucks. You can get 100 2N3904s for half that or less, but it's just not much money.

why pay $12 when you can pay $6 on tayda with shipping included? the 3904 is more general purpose NPN while the fairchild PN2222 is a 300mhz mil-spec transistor. the temperature operating range is superior. Hfe measured from my atlas DCA 55 has all the fairchild PN2222 between 220 to 240. even over a year later with a new batch. thats +/-%5 over the product life cycle. 3904 have been Hfe 245 to 400. also, 3904 is a regular NPN while 2N2222 (and PN2222) is expitaxial planar NPN allowing higher frequencies and cheap mass produced plastic TO-92 case. they are different.

[McSpunckle]

I always forget about Tayda for some reason. I ordered from them once and everything was fine (although their white LEDs aren't that great-- sorta greenish and kinda fragile).

I SHALL STOCK UP ON TRANSISTORS NOW.

[smallsnd/bigsnd]

for what it's worth, i have had bad luck with those ST-branded 2n2222a's. i was using 2 2n2222a in the year4545 and the ST just wouldn't work properly... tried a number of things like changing the pinout, rebiasing, etc but no dice.