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<P>You could also sub the tubes one at a time. I have seen tube/s cause the same problem. Here is one for everyone. I have a GR series receiver which has a hum. I have tried evey thing. The only thing that works is to ground the grid in the audio amplifier. The hum is being picked up by the grid. There is no AC on the output of the power supplies.</P>
<P>Al KE6CPS <BR><BR></P></DIV></div><br clear=all><hr>Get your FREE download of MSN Explorer at <a href='http://go.msn.com/bql/hmtag_etl_EN.asp'>http://explorer.msn.com</a>.<br></html>
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