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Power amp Transistor replacement [message #23823]

Sat, 12 September 2015 10:17

Mrd34d
Messages: 9
Registered: September 2015

Junior Member

I've got all of the other parts for my Kustom Sidewinder ordered, but I'm having a hard time finding this power amp transistor.

Q5 - Kustom part no. 007-0012-00

So far I've have found that it's transistor 38737-40410 nte129 pnp driver

But anything I've come across looks nothing like it (it's the green one). Any ideas?

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Re: Power amp Transistor replacement [message #23826 is a reply to message #23823]

Sat, 12 September 2015 12:13

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

I don't know what you mean by the green one. The original transistor was an RCA 40410 which is a TO-39 metal case transistor that was welded to a heat sink.

Later versions of these amps used a RCA TO-220 with a plastic body that was riveted to a metal heat sink. I don't remember the KEI part number for that transistor, but sometimes the plastic molded cases were red or green.

Please describe the transistor and any numbers, etc. printed on it.

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Re: Power amp Transistor replacement [message #23828 is a reply to message #23826]

Sat, 12 September 2015 12:38

Mrd34d
Messages: 9
Registered: September 2015

Junior Member

I would love to post a picture (it would be easier) but apparently I need 10 posts for that..I have no idea I've done.

Anyway, it's green, rectangular, and has LECG292 - 274 - and the last line I can't tell if it's right side up or upside down.
It's either 2S08HSY or Y(upside down) SH8052

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Re: Power amp Transistor replacement [message #23829 is a reply to message #23823]

Sat, 12 September 2015 14:34

stevem
Messages: 4744
Registered: June 2004
Location: NY

Senior Member

Order up the NTE 129 along with a slip on star type heat sink and you will golden!

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Re: Power amp Transistor replacement [message #23831 is a reply to message #23823]

Sat, 12 September 2015 19:58

chicagobill
Messages: 2005
Registered: April 2003

Senior Member

Is the transistor flat on a u-shaped metal heat sink with three flat leads coming out of one edge? If it is then it is a TO-220 case and the basing will be different than the NTE129. If the transistor is a round metal cased unit with the lead coming out of the bottom then the NTE129 will fit the same pc pattern.

Wait a sec, could the lettering be ECG292? Do the leads fit the board directly or is the transistor mounted standing up with the legs twisted around to fit in?

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