buzzing and pop sound when fender power amp is turned on

zaboomafoo · 27th August 2004, 05:12 PM

Hello,

I have this Fender 80W power amp (solid state) which I use for electric drums and guitar practice. The amp had some problems - it would start to distort randomly. I re-soldered some of the transistors and it seems to help. However now when I turn on the amp (from "cold start") it makes loud buzzing noise which ends with a loud pop sound after 2-3 seconds. After that everything seems to be ok, amp works fine. I tried disconnecting the preamp and it still happens. I also replaced the filter capacitors in power supply and no change. If the amp is on for 10-15min and I turn it off and on - this doesn't happen or it is not that loud. I am woried that this could damage the speakers.

Any ideas are welcome.

27th August 2004, 05:12 PM	#1
zaboomafoo diyAudio Member Join Date: Aug 2004 Location: Canada	buzzing and pop sound when fender power amp is turned on Hello, I have this Fender 80W power amp (solid state) which I use for electric drums and guitar practice. The amp had some problems - it would start to distort randomly. I re-soldered some of the transistors and it seems to help. However now when I turn on the amp (from "cold start") it makes loud buzzing noise which ends with a loud pop sound after 2-3 seconds. After that everything seems to be ok, amp works fine. I tried disconnecting the preamp and it still happens. I also replaced the filter capacitors in power supply and no change. If the amp is on for 10-15min and I turn it off and on - this doesn't happen or it is not that loud. I am woried that this could damage the speakers. Any ideas are welcome.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
'POP' sound when unit is turned off	coki	Car Audio	5	10th September 2007 07:56 AM
Full range buzzing sound. Suggestions?	Sylver300B	Full Range	39	8th November 2006 06:53 AM
Help! Buzzing sound from dustcap	angsuman	Subwoofers	1	28th January 2006 04:36 AM
Buzzing sound	Måsen	Digital Source	0	13th March 2005 08:39 AM
buzzing sound from mini-a's	Dennis Hui	Pass Labs	4	27th December 2002 08:18 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)