Hissing Sound in KT88 Amp

alfcat · 22nd October 2007, 07:12 AM

Hi, I am a newbie to this forum.

There is a Hissing sound coming from my KT88 amp once it has been used for > 3 hours. It won't occur each and every time but the chance of having this annoyance is > 70%.

The Caps were changed but the situation still persists. What could be the cause?

Please advise.

Many thanks

DigitalJunkie · 22nd October 2007, 08:15 AM

Oscillation?

ray_moth · 22nd October 2007, 08:41 AM

Without more information about the design of your amp, any suggestion is just a guess.

felixx · 22nd October 2007, 09:05 AM

Your tube sockets is brand new?

22nd October 2007, 07:12 AM	#1
alfcat diyAudio Member Join Date: Oct 2007	Hissing Sound in KT88 Amp Hi, I am a newbie to this forum. There is a Hissing sound coming from my KT88 amp once it has been used for > 3 hours. It won't occur each and every time but the chance of having this annoyance is > 70%. The Caps were changed but the situation still persists. What could be the cause? Please advise. Many thanks

22nd October 2007, 09:05 AM	#4
felixx diyAudio Member Join Date: Feb 2005 Location: in center	Your tube sockets is brand new? __________________ "I'm glad I can build my own mistakes."

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22nd October 2007, 08:15 AM	#2
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	Oscillation?

22nd October 2007, 08:41 AM	#3
ray_moth diyAudio Moderator Emeritus Join Date: Jan 2004 Location: Jakarta	Without more information about the design of your amp, any suggestion is just a guess.

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