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Transistor Replacement [message #15520] Thu, 14 April 2011 08:52 Go to next message
jmaroto is currently offline  jmaroto
Messages: 14
Registered: February 2011
Junior Member
Hi,

My part supplier is short on NTE128, and probably is going to be re-stock in about a month or maybe more. Confused

The guy offer me a C1008Y-338 stating is an equivalent. From the begining I saw that the package was TO-92 against the original TO-39, either way he assured me that it was an equivalent.

I took a couple and headed back home to check the datasheet, there're certain differences but me being a self teached junior electritian can't tell if would be an impact.

Does anybody tried or know if will be ok to use the C1008Y-338, one of my worries is that the heatsink will not have effect on this kind of package.?

[Updated on: Thu, 14 April 2011 08:58]

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Re: Transistor Replacement [message #15521 is a reply to message #15520] Thu, 14 April 2011 11:40 Go to previous messageGo to next message
stevem is currently offline  stevem
Messages: 4728
Registered: June 2004
Location: NY
Senior Member
With out looking their spec sheet I can not say if they will work,or work good enought!
If they are not rated for atleast 4 watts and have the same DC currnet gain factors, then I would stay away from using them.

Even if they are good wattage wise a gain factor difference will unbalance the two drive signals to the TO3 output transistors and make for lower power output and early nasty sounding distortion.

I see where Mouser electronics has 200 of the NTE128s in stock so why not get them from them?
Re: Transistor Replacement [message #15522 is a reply to message #15520] Thu, 14 April 2011 12:21 Go to previous messageGo to next message
chicagobill
Messages: 2005
Registered: April 2003
Senior Member
What part are you trying to replace? If you look up the data sheet on the C1008Y-338, what are it's ratings? Will those ratings work in the circuit that you are trying to use it in?

As long as the replacement meets or exceeds the ratings that the circuit requires, you can probably use it. There are press-on heatsinks made for TO-92 cases.
Re: Transistor Replacement [message #15527 is a reply to message #15520] Sat, 16 April 2011 10:22 Go to previous message
stevem is currently offline  stevem
Messages: 4728
Registered: June 2004
Location: NY
Senior Member
I know that the TO-39 are rated for 5 watts and I know that they are not being pushed to that in the Kustom circuit, but I do not know that a TO-92 type even with a heat sink will even do 3 watts.
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