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Help. Hissing sound from amp on left channel.Rotel RA 1070
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<blockquote data-quote="handsome" data-source="post: 1117207" data-attributes="member: 772"><p>If the hum changed when you touched the chassis its probably an earthing issue in<em> that channel</em>. If service manual says bias should be set for 5mV they usually mean as measured across the output transistors‘ emitter resistors (each output transistor has its own emitter resistor) not speaker terminals.</p></blockquote><p></p>
[QUOTE="handsome, post: 1117207, member: 772"] If the hum changed when you touched the chassis its probably an earthing issue in[I] that channel[/I]. If service manual says bias should be set for 5mV they usually mean as measured across the output transistors‘ emitter resistors (each output transistor has its own emitter resistor) not speaker terminals. [/QUOTE]
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Audio and Video Talk
General Discussion
Help. Hissing sound from amp on left channel.Rotel RA 1070
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