Transformer <-> Fuse size question? - Page 3

schumpe · 20th July 2007, 07:33 PM

You can check out this link:

http://www.antiqueradio.org/dimbulb.htm

There is another website that describes it better, but I can't find it anymore.

You can also check out the second picture in this thread for the minimalist implementation.

How long did it take to complete your first GC?

The mains bulb tester is dynamite!
Just get a socket from your home hardware store for the price of a couple of fuses!
So easy to build, saves you so much trouble.....

mariusn · 23rd July 2007, 11:54 AM

Reusing my own thread with another question.

The amp is now more or less finish..

On the left channel (speaker terminals on the back) the DC offset is 70 on the right channel it's 4...

Anny suggestions how to fix It.,, (most probable cause and so on)

Can the amp be used with such large gap in offset?

AndrewT · 24th July 2007, 08:26 AM

Hi,
that 70mV is just about tolerable for a medium duty 8ohm speaker.
But it indicates something very different between the two channels.
Investigate and try to reduce below 20mV

Nordic · 24th July 2007, 09:30 AM

Sometimes with all else equal, the diffirence could be down to a chip itself... Play around with your earthing configuration too...

That 70mv should be quite audiable, so it may be worth looking at fixing...

24th July 2007, 08:26 AM	#23
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, that 70mV is just about tolerable for a medium duty 8ohm speaker. But it indicates something very different between the two channels. Investigate and try to reduce below 20mV __________________ regards Andrew T.

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20th July 2007, 07:33 PM	#21
schumpe diyAudio Member Join Date: Sep 2006	You can check out this link: http://www.antiqueradio.org/dimbulb.htm There is another website that describes it better, but I can't find it anymore. You can also check out the second picture in this thread for the minimalist implementation. How long did it take to complete your first GC? The mains bulb tester is dynamite! Just get a socket from your home hardware store for the price of a couple of fuses! So easy to build, saves you so much trouble.....

23rd July 2007, 11:54 AM	#22
mariusn diyAudio Member Join Date: Mar 2006 Location: Malmö	Reusing my own thread with another question. The amp is now more or less finish.. On the left channel (speaker terminals on the back) the DC offset is 70 on the right channel it's 4... Anny suggestions how to fix It.,, (most probable cause and so on) Can the amp be used with such large gap in offset?

24th July 2007, 09:30 AM	#24
Nordic diyAudio Member Join Date: Sep 2005	Sometimes with all else equal, the diffirence could be down to a chip itself... Play around with your earthing configuration too... That 70mv should be quite audiable, so it may be worth looking at fixing...

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