Author Topic: transistor help please  (Read 5019 times)

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Offline Napalm2002

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transistor help please
« on: September 30, 2014, 02:45:47 am »
Hello all

I apologize for asking  such an easy question but I am working on an old akai receiver  aa-6600 and I need to replace a bunch of 2sc458 transistors. I had read somewhere  awhile ago that 2sc2240 was a suitable replacement. So I bought a bunch very cheap and started to replace them. Then I had printed out a data sheet and I saw that the specs are quite different.  Now I am far from an EE so if some of you guys could tell me if you thinks that the 2sc2240 is a close enough  replacement or do I need to buy another part no.

Thanks

Mike M
 

Online T3sl4co1l

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Re: transistor help please
« Reply #1 on: September 30, 2014, 02:54:24 am »
At a very good guess, absolutely any crap will work.  2SC945, 2SC1815, PN2222...

2SC2240, specifically the GR grade will be a closer fit, but yeah, I doubt it matters at all.

Tim
Seven Transistor Labs, LLC
Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 

Offline liquibyte

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Re: transistor help please
« Reply #2 on: September 30, 2014, 02:56:55 am »
Someone else will probably answer your question better than this but I wanted to throw this site out there for you:  http://alltransistors.com/

It helps to narrow down replacements and substitutions but I have to admit that I've only used it a couple of times.  It did work well for those times though.
 

Offline kjn4685

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Re: transistor help please
« Reply #3 on: September 30, 2014, 03:30:24 am »
I would Google it and get the datasheets then compare.
 

Offline Napalm2002

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Re: transistor help please
« Reply #4 on: September 30, 2014, 04:37:53 pm »
I did do that I just do t know how important the specs are and don't know what is ok and what might be too much.
 

Online vk6zgo

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Re: transistor help please
« Reply #5 on: October 01, 2014, 04:53:38 am »
At a very good guess, absolutely any crap will work.  2SC945, 2SC1815, PN2222...

2SC2240, specifically the GR grade will be a closer fit, but yeah, I doubt it matters at all.

Tim

Pretty much my attitude Tim--if it's got 3 legs you are halfway there! ;D

A tip for the OP---------manufacturers like to use the same transistor as much as possible,so if something does look critical,take a look around to see if they use the same device in a non-critical spot.

Steal that one,& replace it with a  2N22?,BC10? or whatever!
 

Offline IconicPCB

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Re: transistor help please
« Reply #6 on: October 01, 2014, 05:28:26 am »
Try BC546 although 2sc2240 is also a good choice being a low noise audio device.
« Last Edit: October 01, 2014, 05:30:53 am by IconicPCB »
 

Offline denelec

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Re: transistor help please
« Reply #7 on: October 01, 2014, 10:25:22 pm »
Why use the Internet when you can dig in old dusty reference guides?  ^-^

According to my Radio-Shack Semiconductor Reference Guide 1988 Edition>:D
The equivalent of 2SC458 is Radio-Shack transistor 276-2009.
http://www.radioshack.com/product/index.jsp?productId=2062608
It's a MPS2222A equivalent.

 


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