I recently noticed on my 2003 Dual Rectifier solo head that all the tubes were gloing on the amp when in standby, but when i switched standby off only 3 of the power tubes had that blue glow from the voltage hitting them. I thought the 1st tube was dead because of this. so i went and bought a quartet of tubes and retubed today. But the same thing is happening. Only 3 of the tubes are glowing blue from full voltage. Should i be worried about this, or am i freaking out about nothing? the tube jack in question is the 1st power tube on the near the output transformer. is there something wrong with the amp, a simple fix, or will if be costly. what do you guys think. btw the thing sounded great! im just worried that im not getting 100% of the power. and the ohmage will be messed up.