Chubbs
Well-known member
Today I went through my JMP as it seems to be lacking something and discovered some odd preamp voltages. The amp is 99% stock with despite some drift in resistor values. I measured all voltages with a wall voltage of 115v. Compared to the Metro Amp manual, some voltages seem unusually high and some unusually low, any input is appreciated.
V1
Pin#1= 146v
Pin#2= 0v
Pin#3= 2.67v
Pin#4= 2.85v
Pin#5= 2.85v
Pin#6= 127v
Pin#7= 0v
Pin#8= 1.8v
Pin#9= 2.8v
V2
Pin#1= 82v
Pin#2= 0v
Pin#3= 0-1v
Pin#4= 2.8v
Pin#5= 2.8v
Pin#6= 150v
Pin#7= 148v
Pin#8= 150v
Pin#9= 2.8v
V3 (Some readings were bouncing between two values)
Pin#1= 123v
Pin#2= 113/10v
Pin#3= 201/42v
Pin#4= 2.9v
Pin#5= 2.9v
Pin#6= 119v
Pin#7= 119/10v
Pin#8= 201/42v
Pin#9= 2.8v
V1
Pin#1= 146v
Pin#2= 0v
Pin#3= 2.67v
Pin#4= 2.85v
Pin#5= 2.85v
Pin#6= 127v
Pin#7= 0v
Pin#8= 1.8v
Pin#9= 2.8v
V2
Pin#1= 82v
Pin#2= 0v
Pin#3= 0-1v
Pin#4= 2.8v
Pin#5= 2.8v
Pin#6= 150v
Pin#7= 148v
Pin#8= 150v
Pin#9= 2.8v
V3 (Some readings were bouncing between two values)
Pin#1= 123v
Pin#2= 113/10v
Pin#3= 201/42v
Pin#4= 2.9v
Pin#5= 2.9v
Pin#6= 119v
Pin#7= 119/10v
Pin#8= 201/42v
Pin#9= 2.8v