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!
mknowles16
If you want to get it up and running either email JWu or myself from the Alta Vista website. JWu is in CA and I am in NJ.
Bigkidz the 5.1 is pure tube rectifier and regulator contrary to whats written on AltaVista. The 3.1 is solid state.
I think even the voltage reference uses a gas tube.
I am looking for some tube suggestions for the RIAA/ Line stage? Any ideas I would greatly appreciate.
With all the counterfeit 6922s floating around your money is better spent on caps and resistors.