If that tube is used as a voltage reference or as a voltage regulator and the voltage was low, that could potentially cause a loss in gain. I'm just guessing at this point. The dark band/ring around the center of the plate of the tube usually indicates the tube is worn out or damaged.
Counterpoint 5.1- Beyond My Comprehension
I just experienced good news a moment ago- my Counterpoint 5.1 preamp is again operating properly. I had experienced greatly diminished volume in my system. This happened suddenly- when I powered everything up an placed an LP on the table, it was barley audible. All other selections were lower also.
To make a long story of tube swapping, amp swapping and speaker swapping short, I replaced the CA4 in the power supply and all is well. It appeared to have a smoky band around the center of the tube.
Does anyone know why this caused a reduction in volume instead of a total loss of volume?
Thanks in advance!
To make a long story of tube swapping, amp swapping and speaker swapping short, I replaced the CA4 in the power supply and all is well. It appeared to have a smoky band around the center of the tube.
Does anyone know why this caused a reduction in volume instead of a total loss of volume?
Thanks in advance!