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Millet Max Grounding issue

post #1 of 2
5/16/11 at 8:51am
Thread Starter 

Hey All,

 

After searching the forums for quite some time to find an answer to my issue I came up blank so here it goes...

 

I successfully have constructed a millet max and it sounds awesome!  I have a strange issue though that I can't figure out...

 

When there are no cables plugged into the RCA jacks on the back I have quite a bit of hum, but then as soon as the cables are plugged in, the amp goes absolutely silent, not even a whisper if you crank the gain all the way up.  Granted this isn't really an issue because it doesn't happen unless there is no source connected, I am really interested in finding out what is causing this...

 

**My Max is enclosed in the regular hammond case with wood front and back panels.  I built the Can't Miss Max #2 http://www.diyforums.org/MAX/MAXboutique.php

 

Thanks in advance for the help!

 

-Adam

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post #2 of 2
5/16/11 at 3:41pm
Quote:
Originally Posted by agutt View Post

Hey All,

 

After searching the forums for quite some time to find an answer to my issue I came up blank so here it goes...

 

I successfully have constructed a millet max and it sounds awesome!  I have a strange issue though that I can't figure out...

 

When there are no cables plugged into the RCA jacks on the back I have quite a bit of hum, but then as soon as the cables are plugged in, the amp goes absolutely silent, not even a whisper if you crank the gain all the way up.  Granted this isn't really an issue because it doesn't happen unless there is no source connected, I am really interested in finding out what is causing this...

 

**My Max is enclosed in the regular hammond case with wood front and back panels.  I built the Can't Miss Max #2 http://www.diyforums.org/MAX/MAXboutique.php

 

Thanks in advance for the help!

 

-Adam


Many amps do this (almost every one I have does - including many that are not Millett Hybrids).  It's nothing to be concerned about.  As for the reasons, someone more knowledgeable than me will have to explain it. I suspect it's more because there's no feedback, rather than some grounding issue that's created without a source connection.

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