I am looking for any help or guidance. Any help is much appreciated. I am tying to learn about electronics and tube amps in general. In the process of reading up. I Ordered tools and probably started exploring too early but felt I knew the safety precautions so I proceeded. Situation. I have a Quicksilver HPA Tube Set amp. Utilizes 12AX7 input tubes (1 per channel) and 6BQ5 output tubes (1 per channel). I liked the amp so I decided to upgrade starting with the coupling caps. I replaced the .12uf 400 VDC (quicksilver branded) with Jupiter Caps .15uf 600v caps. The results were good and the amp didn't act up. thought I was ok by keeping uf value close as possible but getting more volts. I then chose to remove the alps pot. I tried to install a super nice TDK volume pot but it was too big. I ended up gong with a smaller (in size) 100 ohm TDK pot. I soldered it in place. Started to play music and it was sounding quite nice. I ended up turning off the amp and heard a zap and saw the residual light come under the case. Upon closer inspection I have fried two resistors on one of the 6BQ5 output tubes. They appear to 5 band 570ohm 1% in value. First one is attached to PIN 3 and 4 so by my research (3 pin Cathode and grid 3) and (4 pin filament). The other resistor appears to be on pin 3 and pin 5 which is also a filament. I reached out to QS audio to see if he would sell me the resistors. I also checked some of the normal supply websites and it seems these resistors are not stocked. What did I do? I kinda feel that I may have pushed the resistors into contact causing them to fry while working on amp. Or did I wire the TDK volume pot up wrong (does not seem so but not ruling it out) Or did I change values so much that I caused this?