VintageKustom.com: Repairing Kustom Amps

Home » VintageKustom.com » Repairing Kustom Amps » K200b-6 (Help its been a long time)

Show: Today's Messages :: Polls :: Message Navigator

K200b-6 [message #21343]

Thu, 04 September 2014 14:01

Daytopper
Messages: 7
Registered: September 2014
Location: Wake Forest

Junior Member

Hi, I'm a newbie to this Forum and look forward to being a part of what seems to be a pretty good one!
I received a K200 bass amp for repair and since its been a very long time since i've worked on Solid State amps, I'm somewhat stuck on this repair. The original complaint is noise and popping which I have not yet observed. During my initial testing I've noticed that the negative side of the output is clipping way before the plus side. I've done all the preliminary troubleshooting and all voltages both the high rails and the =- 8volts are on the money. I've tried to swap the 2 pairs of output transistors and clipped the diodes in the protection circuits and checked multiple resistor values to no avail. Am I looking at driver transistor replacement? Any ideas would be greatly appreciated.
Thanks
Kenny

Report message to a moderator

[Message index]

		K200b-6 By: Daytopper on Thu, 04 September 2014 14:01
		Re: K200b-6 By: chicagobill on Thu, 04 September 2014 14:35
		Re: K200b-6 By: Daytopper on Thu, 04 September 2014 14:58
		Re: K200b-6 By: stevem on Thu, 04 September 2014 16:58
		Re: K200b-6 By: Daytopper on Thu, 04 September 2014 20:49
		Re: K200b-6 By: stevem on Thu, 04 September 2014 21:18
		Re: K200b-6 By: Daytopper on Thu, 04 September 2014 21:43
		Re: K200b-6 By: chicagobill on Sat, 06 September 2014 02:06
		Re: K200b-6 By: stevem on Sat, 06 September 2014 10:51
		Re: K200b-6 By: Daytopper on Sat, 06 September 2014 11:19
		Re: K200b-6 By: chicagobill on Sat, 06 September 2014 12:02
		Re: K200b-6 By: Daytopper on Sat, 06 September 2014 12:11
		Re: K200b-6 By: chicagobill on Sat, 06 September 2014 12:30
		Re: K200b-6 By: stevem on Sat, 06 September 2014 13:20
		Re: K200b-6 By: Daytopper on Sat, 06 September 2014 14:07
		Re: K200b-6 By: stevem on Sun, 07 September 2014 06:55

Previous Topic:	250 tremelo, vibrato noise
Next Topic:	200A-4

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Jun 06 11:29:09 EDT 2024