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<TITLE>RE: Spring Line Hum</TITLE>
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<P><FONT SIZE=2>All this talk of hum can't possibly be that difficult. (Coming from a guy with no experience :) ). I have an old Yamaha G212 guitar amp with a 1 foot long reverb tank. It's mounted right on the head. Both the head and the tank are made of that yellowish metal. When the volume is turned up to 10 and the reverb is turned up to 10, you hear practically no hum. And you can't hear any difference rotating the reverb control full on to full off.</FONT></P>
<P><FONT SIZE=2>So the hum problem certainly must be preventable. I haven't got any schematics for the amp so I don't know what circuitry drives it. But I'll bet the secret is in just-the-right shielding - a low tech solution that Yamaha has shown to work well. So isn't sheilding the tank the solution? Seems non-elegant over-engineer an under-engineered problem.</FONT></P>
<P><FONT SIZE=2>John Speth</FONT>
<BR><FONT SIZE=2>Molectron Detector, Inc.</FONT>
<BR><FONT SIZE=2><A HREF="http://www.molectron.com" TARGET="_blank">http://www.molectron.com</A></FONT>
<BR><FONT SIZE=2><A HREF="mailto:johns@molectron.com">mailto:johns@molectron.com</A> </FONT>
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