offset problem

intense-tavda · 18th June 2009, 01:12 PM

Hi There!
I got me a class a 100W monoblock from jungson, with a minor problem. DC offset is running from 0 to 110mv and after that it stays from 90 between 110 mv. With a loud hum and no sound. Whats happening? Thanks Teake

peranders · 18th June 2009, 01:18 PM

I think that you haven't an offset problem. You are having more serious problems.

Have it worked proberly and then suddenly it started to hum, even with no input signal?

intense-tavda · 20th June 2009, 07:32 PM

Thanks P-A! Thats what happened? Teake

intense-tavda · 21st June 2009, 08:09 AM

And now?

tiefbassuebertr · 21st June 2009, 06:31 PM

Hi,
is it the model, that you can see about the URL
http://www.jungson.com/content/product_pages/ja100n.htm ?

If you can post the schematic, perhaps I can give you any advices.

You can order the schematic by
http://www.jungson.com/content/contact_us.htm

intense-tavda · 21st June 2009, 06:41 PM

Thank you! I'll sent them a mail. Teake

intense-tavda · 22nd June 2009, 08:24 AM

btw The amplifier is class A, and still getting hot, although it does not produce sound. Teake

18th June 2009, 01:12 PM	#1
intense-tavda diyAudio Member Join Date: Jun 2005 Location: drachten	offset problem Hi There! I got me a class a 100W monoblock from jungson, with a minor problem. DC offset is running from 0 to 110mv and after that it stays from 90 between 110 mv. With a loud hum and no sound. Whats happening? Thanks Teake

18th June 2009, 01:18 PM	#2
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	No offset problem I think that you haven't an offset problem. You are having more serious problems. Have it worked proberly and then suddenly it started to hum, even with no input signal? __________________ /Per-Anders (my first name) or P-A as my friends call me

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20th June 2009, 07:32 PM	#3
intense-tavda diyAudio Member Join Date: Jun 2005 Location: drachten	Thanks P-A! Thats what happened? Teake

21st June 2009, 08:09 AM	#4
intense-tavda diyAudio Member Join Date: Jun 2005 Location: drachten	And now?

21st June 2009, 06:31 PM	#5
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	Hi, is it the model, that you can see about the URL http://www.jungson.com/content/product_pages/ja100n.htm ? If you can post the schematic, perhaps I can give you any advices. You can order the schematic by http://www.jungson.com/content/contact_us.htm

21st June 2009, 06:41 PM	#6
intense-tavda diyAudio Member Join Date: Jun 2005 Location: drachten	Thank you! I'll sent them a mail. Teake

22nd June 2009, 08:24 AM	#7
intense-tavda diyAudio Member Join Date: Jun 2005 Location: drachten	btw The amplifier is class A, and still getting hot, although it does not produce sound. Teake

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