parts resistors transistors

[AMX]

I cant seem to find these transistors and resistors

4.7K Ohm 1/4-Watt Carbon Film Resistor 5% tolerance

NPN 2N222 rated 600mW - Case Type TO-92

i have looked maplin, rs and ebay anyone know a uk website i can get
these from thanks

 

[John Popelish]

I cant seem to find these transistors and resistors

4.7K Ohm 1/4-Watt Carbon Film Resistor 5% tolerance

Radio Shack #271-1330

NPN 2N222 rated 600mW - Case Type TO-92

I think you are looking for 2N2222.
that is Radio Shack # 276-1617

 

[PeteG]

I cant seem to find these transistors and resistors

4.7K Ohm 1/4-Watt Carbon Film Resistor 5% tolerance

NPN 2N222 rated 600mW - Case Type TO-92

i have looked maplin, rs and ebay anyone know a uk website i can get
these from thanks

http://www.maplin.co.uk/Search.aspx?criteria=2n2222&doy=26m1&source=15

http://www.maplin.co.uk/Search.aspx?criteria=4k7&doy=26m1&source=15

The resistor is a pack of 10 x 0.6W 1% which will substitue for the one you
specify without a problem.

 

[Pooh Bear]

I cant seem to find these transistors and resistors

4.7K Ohm 1/4-Watt Carbon Film Resistor 5% tolerance

NPN 2N222 rated 600mW - Case Type TO-92

i have looked maplin, rs and ebay anyone know a uk website i can get
these from thanks

You obviously didn't look that hard. Try searching "4k7" on the site.

I'd suggest you find a substitute for the 2N2222. It's in a hermetic
metal can package and is quite expensive. Try BC548 for example.

Graham

 

[Pooh Bear]

Radio Shack #271-1330


I think you are looking for 2N2222.
that is Radio Shack # 276-1617

No Radio Shack in the UK.

Graham

 

[Pooh Bear]

http://www.maplin.co.uk/Search.aspx?criteria=2n2222&doy=26m1&source=15

91 p each !!!!

Use this....

http://www.maplin.co.uk/Module.aspx?ModuleNo=32952&criteria=bc548b&doy=26m1

Graham

 

[Rich Grise]

No Radio Shack in the UK.

Graham

How about Maplin's or Radio Spares?

And, just for the record, Radio shack doesn't have 2N2222's - it
has PN2222's, which are the plastic version. ;-) (Do I get any
points for one-upping John P? ;-D )

And, depending on the circuit, it _could_ be replaced by almost
any NPN small signal transistor, depending on which are the
"important" specs in the app.

And if you haven't found a 4.7K 1/4W 5% resistor, you haven't
been looking very hard.

This can be substituted by any 4.7K resistor (well, maybe not
wirewound - again, depends on the app) with a power rating of
1/4 W or more, and a tolerance of 5% or better (i.e, a smaller
percentage value is a better tolerance, like 2%, 1%, etc.)

Try googling on "electronics suppliers UK" or something.

Good Luck!
Rich

 

[John Popelish]

How about Maplin's or Radio Spares?

And, just for the record, Radio shack doesn't have 2N2222's - it
has PN2222's, which are the plastic version. ;-) (Do I get any
points for one-upping John P? ;-D )

Absolutely. But Radio Shack sells "2N2222"'s in a TO-92 package. Search
http://www.radioshack.com/home/index.jsp
for part # 276-1617

And, depending on the circuit, it _could_ be replaced by almost
any NPN small signal transistor, depending on which are the
"important" specs in the app.

A common substitute might be 2N4401.

 

[Pooh Bear]

Absolutely. But Radio Shack sells "2N2222"'s in a TO-92 package.

If it's not TO-18 it's not a 2N2222 ! You mean a PN2222.

Search
http://www.radioshack.com/home/index.jsp
for part # 276-1617

A common substitute might be 2N4401.

That's a switching transistor. I think its beta isn't that great. I've
suggested 2N3904 or BC548 as a decent 'better' sub.

Graham

 

[ehsjr]

John Popelish wrote:




If it's not TO-18 it's not a 2N2222 ! You mean a PN2222.




That's a switching transistor. I think its beta isn't that great. I've
suggested 2N3904 or BC548 as a decent 'better' sub.

Graham

Fairchildsemi calls it a "General Purpose Amplifier".

The BC548 can't hold a candle to a PN2222 or a 2N4401
for Ic, and won't meet the op's spec for 600 mW. The 2N3904
might be ok, but it still trails the PN2222 and 2N4401 by a
huge margin (200 mA vs 500 mA) in Ic. Beta for the PN2222 or
2N4401 is far better at 100 mA (Ic) and above than the 2N3904,
and 100 mA is the maximum for the BC548.

If we knew that the op's circuit ran say 50 mA Ic, then, all
other conditions being equal, the BC548 or 2N3904 would be
good choices to replace the 2N or PN 2222. But not knowing,
the 2N4401 is a much better choice.

Ed

 

[redbelly]

I cant seem to find these transistors and resistors ..
..
..
. . . anyone know a uk website i can get
these from thanks

Try Farnell:

http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=9339540&N=401

Mark

 

[Rich Grise]

Absolutely. But Radio Shack sells "2N2222"'s in a TO-92 package. Search
http://www.radioshack.com/home/index.jsp for part # 276-1617

A common substitute might be 2N4401.

Ah. Now I see where that other fellow got "2N222". ;-)

Thanks!
Rich

 

[Rich Grise, but drunk]

If it's not TO-18 it's not a 2N2222 ! You mean a PN2222.

Careful, Pooh. I got in trouble only a few days ago, saying, "If it's not
plastic, it's not a 1N400X!" ;-) (well, I didn't say, "ex", but whichever
one it was - either 4004 or 4007, which other ones do they bother to
put on the market?)

And John, being cleverer than both of us put together, did enclose the
alleged part number in quotes. ;-)

That's a switching transistor. I think its beta isn't that great. I've
suggested 2N3904 or BC548 as a decent 'better' sub.

I'm too lazy to look up 2N3904 - isn't that one just a little less
robust than the venerable 2222?

Thanks!
Rich