Perreaux problems

Agroeureka · 26th September 2009, 08:01 AM

Hi
I had my perreaux 8000c re caped, small signal transistors replaced re biased and cleaned with 2 fets replaced around one month ago.I just got around to hooking it up last night and found that it seems to have uncontroled gain??
I am using it to power a set of homemade ported subs 200hz to 50 hz when i tryed the amp listening to Seal the subs were over extending and sounding uncontrolled and loose. Apon hearing this i changed the amp out for my other perreaux to find the speakers and inputs ok.
My question to anyone is could some one please explain the cause of this or point me in the direction to find the faults both chennels.
Will post schematic if required.

Any one helping i would like to thank in advance

Andrew

analog_sa · 26th September 2009, 09:38 AM

Acute Seal allergy? Or else you don't like the new caps. Different brand?

Agroeureka · 26th September 2009, 10:23 AM

Hi
Thought of Acute Seal allergy! And then tried some White snake.
Caps where of brands suggested from this site .
I did not see them go in but i will be checking in the morning.
I had an expert put them in and set up the bias the other perreaux i have is a 9000b and i did the service on it no problems. So i am lost ????????????????????????????

Andrew

Zen Mod · 26th September 2009, 11:09 AM

both channels , I resume ?

schematic will help , at least to find what's common for both channels .

Agroeureka · 26th September 2009, 11:39 AM

Hope this helps

Andrew

Agroeureka · 26th September 2009, 11:14 PM

Hi
File is to large will work out how to resize and post

Andrew

Agroeureka · 3rd October 2009, 05:11 AM

Hi

Have added schematic happens in both channels.
Have now checked over replacment caps all look ok do not know the brand.

Can not find anything at fault or wrong.

This is driving me nuts!!!!!!!!!!!!

Driving my subs with an old ETI 50w amp not my costly Perreaux.

Andrew

26th September 2009, 08:01 AM	#1
Agroeureka diyAudio Member Join Date: May 2009	Perreaux problems Hi I had my perreaux 8000c re caped, small signal transistors replaced re biased and cleaned with 2 fets replaced around one month ago.I just got around to hooking it up last night and found that it seems to have uncontroled gain?? I am using it to power a set of homemade ported subs 200hz to 50 hz when i tryed the amp listening to Seal the subs were over extending and sounding uncontrolled and loose. Apon hearing this i changed the amp out for my other perreaux to find the speakers and inputs ok. My question to anyone is could some one please explain the cause of this or point me in the direction to find the faults both chennels. Will post schematic if required. Any one helping i would like to thank in advance Andrew

26th September 2009, 11:09 AM	#4
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	both channels , I resume ? schematic will help , at least to find what's common for both channels . __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

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26th September 2009, 09:38 AM	#2
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	Acute Seal allergy? Or else you don't like the new caps. Different brand?

26th September 2009, 10:23 AM	#3
Agroeureka diyAudio Member Join Date: May 2009	Hi Thought of Acute Seal allergy! And then tried some White snake. Caps where of brands suggested from this site . I did not see them go in but i will be checking in the morning. I had an expert put them in and set up the bias the other perreaux i have is a 9000b and i did the service on it no problems. So i am lost ???????????????????????????? Andrew

26th September 2009, 11:39 AM	#5
Agroeureka diyAudio Member Join Date: May 2009	Hope this helps Andrew

26th September 2009, 11:14 PM	#6
Agroeureka diyAudio Member Join Date: May 2009	Hi File is to large will work out how to resize and post Andrew

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