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Chip Amps Amplifiers based on integrated circuits

Yet Another Set of Noob GC Questions
Yet Another Set of Noob GC Questions
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Old 23rd February 2007, 11:10 AM   #1
Thomo is offline Thomo  United Kingdom
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Default Yet Another Set of Noob GC Questions

Hi everyone. I am attempting my first GC and am having trouble with the grounding. I have followed the LM3886 datasheet layout and as I am quite poor at the moment I have decided to build on Matrix board. I realise that this isn't the optimum but I just want to get the thing working before I tweak.

I have:
Dual secondary tx,
2 Rectifiers,
2 lm3886,
2 6800uF 100v
2 560uF 50v Pana FC

My problem is that I don't know where to connect the earths.

Where do I connect pin 7 (gnd)?

Also where do I connect the - lead of the speaker? I read that this should be connected to power ground but if I do I read -38v across the speaker

Anyone, help please?

Lee.
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Old 23rd February 2007, 11:41 AM   #2
Nuuk is offline Nuuk  United Kingdom
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Lee, take a look here . I tshould answer most of your questions!
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Old 23rd February 2007, 12:10 PM   #3
Thomo is offline Thomo  United Kingdom
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Excellent!

Thank you very much Nuuk.

Lee.
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