I had a question regarding the Hum Balance pot and general ground noise.
When I turn my V4 On from Standby, I get some noise/humming. This slightly quiets when the volume control on the amp is turned up slightly from being full Off.
I tried the hum balance control but got lots of noise throughout the sweep of the control until each end of the HB control: fully counter clockwise and the lots of noise stops, and the noise level is back to its initial humming. Turn the HB control fully CW and the same thing, but in-between on the control is noise.
I added a three prong cord, and removed the death cap. The polarity switch is still hooked up, and that doesn't seem to have any effect on the noise/hum I'm experiencing.
The hum level seems to be both at home and my studio, though perhaps more at the latter, or perhaps it is perceived as more because I'm running the amp through a 4x12 vs a small speaker at home for testing purposes.
EDIT**** I noticed today that there was a fair amount of hum, like I was talking about, but it was only on Input 1, and only when the Sensitivity rocker was at its lowest - to the left, if viewing the control panel. When the sensitivity is in the middle position, it also produces the hum, but not when all the way up/to the right.
Input 2 and Volume 2 do not have this issue - the Sens. rocker can be in any position and I don't get that hum.
Any thoughts?
When I turn my V4 On from Standby, I get some noise/humming. This slightly quiets when the volume control on the amp is turned up slightly from being full Off.
I tried the hum balance control but got lots of noise throughout the sweep of the control until each end of the HB control: fully counter clockwise and the lots of noise stops, and the noise level is back to its initial humming. Turn the HB control fully CW and the same thing, but in-between on the control is noise.
I added a three prong cord, and removed the death cap. The polarity switch is still hooked up, and that doesn't seem to have any effect on the noise/hum I'm experiencing.
The hum level seems to be both at home and my studio, though perhaps more at the latter, or perhaps it is perceived as more because I'm running the amp through a 4x12 vs a small speaker at home for testing purposes.
EDIT**** I noticed today that there was a fair amount of hum, like I was talking about, but it was only on Input 1, and only when the Sensitivity rocker was at its lowest - to the left, if viewing the control panel. When the sensitivity is in the middle position, it also produces the hum, but not when all the way up/to the right.
Input 2 and Volume 2 do not have this issue - the Sens. rocker can be in any position and I don't get that hum.
Any thoughts?