Didn't we determine earlier that if you turned the guitar down the hum went away? Refer to posts #32 and #33 That meaning the guitar was picking up the hum. if you can turn the guitar volume control to zero and the noise stops, the noise is not from the amp. And that would rule out the pedals as well. You can look all you want in the amp or your pedals and you won;t find a problem that is in your guitar.
Why does it wait until second set? becasue that is about the time the heavy air conditioning starts to work, the walk-in coolers start to work because the doors are opening a lot, the compressors on various stuff are working, and who knows how balanced the mains power is at the gig. You think your amp is any less warm when you run it at home where it doesn't hum. Also could be that by second set they have dialed the house lights down and the dimmers are radiating hum. believe me that is nothning new.
Why does it happen in the OD channel more than the clean? The OD channel has more gain, so it amplifies noise more, just as it amplifies your guitar more. That is why OD chanels hiss more than clean channels.
Popping - do you have the reverse diode across the relay coil or not?
And when it comes to hanging resistors, you have to do them all as required for results. You can;t try them one at a time
Why does it wait until second set? becasue that is about the time the heavy air conditioning starts to work, the walk-in coolers start to work because the doors are opening a lot, the compressors on various stuff are working, and who knows how balanced the mains power is at the gig. You think your amp is any less warm when you run it at home where it doesn't hum. Also could be that by second set they have dialed the house lights down and the dimmers are radiating hum. believe me that is nothning new.
Why does it happen in the OD channel more than the clean? The OD channel has more gain, so it amplifies noise more, just as it amplifies your guitar more. That is why OD chanels hiss more than clean channels.
Popping - do you have the reverse diode across the relay coil or not?
And when it comes to hanging resistors, you have to do them all as required for results. You can;t try them one at a time
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