Tube Bogen J330 PA amp

Preacher · 20th June 2006, 02:03 PM

I have a tube bogen j 330 with 2 Jensen alnico 12's.

I got this great clean amp and it powered up and worked great for hours, but then the main capacitor had a meltdown. I took it to an elec . shop but the guy there was a nitwit. Long story short; I don't know what value capacitors this takes. The original was a single can with 2 or 3 different cap values inside.

Any suggestions?

karma · 20th June 2006, 02:33 PM

post a pic of the cap

values should be stamped on the side

Tom Bavis · 20th June 2006, 02:35 PM

Service info (schematic, parts list) is in Sams Photofact folder 291-5 - I don't think I have it. Check your library.

Preacher · 21st June 2006, 01:54 PM

The service center where I took it lost the original cap. I'm sure my library doesn't have any photofact books. There is a city an hour or so which may have it.

Thanks for the responses. If anyone else has an idea let me know.

Enzo · 22nd June 2006, 12:31 AM

Forget the can. Mount axial lead caps somewhere convenient. The 22uf @ 500v caps are readily available adn inexpensive. So I would use a couple of them. If you then decide there needs to be more filtration, you can change to a larger cap. The 22/500 is as good a starting point as any. If yours has a voltage doubler, then maybe a couple 40uf instead.

Preacher · 25th June 2006, 07:49 AM

Thanks again for the advice. What about one of these?

http://www.partsexpress.com/pe/showd...number=020-602

What would be the effects of using the wrong value?

20th June 2006, 02:03 PM	#1
Preacher diyAudio Member Join Date: Jun 2006	Tube Bogen J330 PA amp I have a tube bogen j 330 with 2 Jensen alnico 12's. I got this great clean amp and it powered up and worked great for hours, but then the main capacitor had a meltdown. I took it to an elec . shop but the guy there was a nitwit. Long story short; I don't know what value capacitors this takes. The original was a single can with 2 or 3 different cap values inside. Any suggestions?

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20th June 2006, 02:33 PM	#2
karma diyAudio Member Join Date: Feb 2003 Location: hamilton,ontario	post a pic of the cap values should be stamped on the side

20th June 2006, 02:35 PM	#3
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	Service info (schematic, parts list) is in Sams Photofact folder 291-5 - I don't think I have it. Check your library.

21st June 2006, 01:54 PM	#4
Preacher diyAudio Member Join Date: Jun 2006	The service center where I took it lost the original cap. I'm sure my library doesn't have any photofact books. There is a city an hour or so which may have it. Thanks for the responses. If anyone else has an idea let me know.

22nd June 2006, 12:31 AM	#5
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	Forget the can. Mount axial lead caps somewhere convenient. The 22uf @ 500v caps are readily available adn inexpensive. So I would use a couple of them. If you then decide there needs to be more filtration, you can change to a larger cap. The 22/500 is as good a starting point as any. If yours has a voltage doubler, then maybe a couple 40uf instead.

25th June 2006, 07:49 AM	#6
Preacher diyAudio Member Join Date: Jun 2006	Thanks again for the advice. What about one of these? http://www.partsexpress.com/pe/showd...number=020-602 What would be the effects of using the wrong value?

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