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DIY For Audio
Power amp diagnostics / earthing advice: help needed
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<blockquote data-quote="LAV" data-source="post: 73518" data-attributes="member: 1123"><p>Thanks guys, I really appeciate your help and advice, and Gert, no problem, you raise some valid safety points. I will have to take you up on that kind offer. I am stumped.</p><p></p><p>I am just not 100% convinced the problem is in the power amp. The only thing that has changed in this whole setup is thr power amp. My RB-1070 is not earthed (by design) and the RB-1080 is. Also, the 1070 does not have that 10 Ohm resistor between audio gnd. and chassis gnd, (they are directly connected) while the 1080 has. </p><p></p><p>The 991 and 1090 schematics should probably be very close to identical to that of the 1080 when it comes to the input circuitry and earthing arrangements,</p></blockquote><p></p>
[QUOTE="LAV, post: 73518, member: 1123"] Thanks guys, I really appeciate your help and advice, and Gert, no problem, you raise some valid safety points. I will have to take you up on that kind offer. I am stumped. I am just not 100% convinced the problem is in the power amp. The only thing that has changed in this whole setup is thr power amp. My RB-1070 is not earthed (by design) and the RB-1080 is. Also, the 1070 does not have that 10 Ohm resistor between audio gnd. and chassis gnd, (they are directly connected) while the 1080 has. The 991 and 1090 schematics should probably be very close to identical to that of the 1080 when it comes to the input circuitry and earthing arrangements, [/QUOTE]
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DIY & Tutorials
DIY For Audio
Power amp diagnostics / earthing advice: help needed
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