I agree with Bill F.
I deoxidized my tube pins and sockets every few months with Caig Deoxit and then clean the residue with alcohol 99% and finish off with Kontak. I have used QSG on tube pins in the past with no audible difference. The problem with power tubes is with the heat they generate the QSG cooks on the pins and you can't get it off later on if you have to.....very difficult. It also, "loosen" the power tubes in their socket preventing a tight fit when the stuff is on.
The only place i use it is on interconnects and speaker/power cables and my tonearm cable and cartridge pins. Not using it at all on any tubes.
I deoxidized my tube pins and sockets every few months with Caig Deoxit and then clean the residue with alcohol 99% and finish off with Kontak. I have used QSG on tube pins in the past with no audible difference. The problem with power tubes is with the heat they generate the QSG cooks on the pins and you can't get it off later on if you have to.....very difficult. It also, "loosen" the power tubes in their socket preventing a tight fit when the stuff is on.
The only place i use it is on interconnects and speaker/power cables and my tonearm cable and cartridge pins. Not using it at all on any tubes.