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1967 Kustom 200A4 update [message #24464]

Sat, 23 January 2016 22:26

Shaun_Musings
Messages: 323
Registered: April 2009
Location: Reading, MA

Senior Member

Okay, so what I've done is replaced all of the resistors and transistors on PC502 and PC602; I wanted to pretty much start from scratch. I made sure everything was in the correct position there, and then moved to PC702. Replaced all the transistors with heat sinks, replaced the other three transistors without heat sinks mounted on the boards, replaced most of the resistors, replaced the diode attached to the clamp. Now, toward the output side of 702, there are two 40410 transistors which have been replaced with NTE129s. The resistor next to the first one started smoking and I turned off the amp. I've checked where it is in the circuit, and it is attached to not just the transistor on the floor in the metal case, but to a green wire which is going to the top of one of the big filter caps.

I have new floor replacement transistors (The ones in the metal case), but I don't just want to throw them in and find out it was something else that is causing the problem.

I've ordered the remaining resistors on PC702 that need to be replaced, along with the 5 watt 1 ohm resistors (I had ordered them but for some reason they sent 22 ohm 5 watt resistors. Bizarre). I guess the question is: am I missing something? Once these pieces are installed, the only thing that would be left are the diodes which are attached to the board. Suggestions?

Born on the Baaaaayou (Ok, in Massachusetts)

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[Message index]

		1967 Kustom 200A4 update By: Shaun_Musings on Sat, 23 January 2016 22:26
		Re: 1967 Kustom 200A4 update By: chicagobill on Sun, 24 January 2016 03:13
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Sun, 24 January 2016 11:30
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Sun, 24 January 2016 20:50
		Re: 1967 Kustom 200A4 update By: chicagobill on Sun, 24 January 2016 19:39
		Re: 1967 Kustom 200A4 update By: chicagobill on Sun, 24 January 2016 21:41
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Sun, 24 January 2016 22:04
		Re: 1967 Kustom 200A4 update By: chicagobill on Mon, 25 January 2016 13:33
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Tue, 26 January 2016 11:02
		Re: 1967 Kustom 200A4 update By: stevem on Tue, 26 January 2016 05:51
		Re: 1967 Kustom 200A4 update By: chicagobill on Tue, 26 January 2016 11:54
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Tue, 26 January 2016 12:41
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Tue, 26 January 2016 20:07
		Re: 1967 Kustom 200A4 update By: chicagobill on Tue, 26 January 2016 14:01
		Re: 1967 Kustom 200A4 update By: chicagobill on Tue, 26 January 2016 20:18
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Tue, 26 January 2016 20:53
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Wed, 27 January 2016 10:33
		Re: 1967 Kustom 200A4 update By: chicagobill on Tue, 26 January 2016 22:59
		Re: 1967 Kustom 200A4 update By: stevem on Wed, 27 January 2016 11:15
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Wed, 27 January 2016 12:03
		Re: 1967 Kustom 200A4 update By: chicagobill on Wed, 27 January 2016 12:43
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Wed, 27 January 2016 12:48
		Re: 1967 Kustom 200A4 update By: Kustom_Bart on Wed, 27 January 2016 14:41
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Wed, 27 January 2016 15:45
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Wed, 27 January 2016 15:58
		Re: 1967 Kustom 200A4 update By: stevem on Thu, 28 January 2016 05:53
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Thu, 28 January 2016 09:30
		Re: 1967 Kustom 200A4 update By: chicagobill on Thu, 28 January 2016 12:48
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Thu, 28 January 2016 13:32
		Re: 1967 Kustom 200A4 update By: pleat on Thu, 28 January 2016 14:47
		Re: 1967 Kustom 200A4 update By: chicagobill on Thu, 28 January 2016 16:47
		Re: 1967 Kustom 200A4 update By: stevem on Thu, 28 January 2016 16:57
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Thu, 28 January 2016 17:31
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Thu, 28 January 2016 18:50
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Thu, 28 January 2016 18:51
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Thu, 28 January 2016 21:35
		Re: 1967 Kustom 200A4 update By: chicagobill on Thu, 28 January 2016 22:46
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Fri, 29 January 2016 13:01
		Re: 1967 Kustom 200A4 update By: chicagobill on Fri, 29 January 2016 13:13
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Fri, 29 January 2016 13:23
		Re: 1967 Kustom 200A4 update By: stevem on Fri, 29 January 2016 14:10
		Re: 1967 Kustom 200A4 update By: chicagobill on Fri, 29 January 2016 14:25
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Fri, 29 January 2016 19:35
		Re: 1967 Kustom 200A4 update By: chicagobill on Fri, 29 January 2016 20:51
		Re: 1967 Kustom 200A4 update By: Shaun_Musings on Fri, 29 January 2016 22:36
		Re: 1967 Kustom 200A4 update By: chicagobill on Sat, 30 January 2016 11:50
		Re: 1967 Kustom 200A4 update By: stevem on Sat, 30 January 2016 12:01

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