Time to turn to my trusted TDPRI troubleshooters. My DIY 5E3 has gone rather quiet, and after checking voltages it seems to have developed a very low voltage on pin 7 of V2. According to Robrob it should be about 17V, and mine is 3V. The full V2 pin chart is (Rob's figures in brackets)... #1 (164) 179V #3 (1.2) 1.3V #6 (200) 189V #7 (17) 3V #8 (45) 45V All other B+ and pin voltages are close to Rob's. I've checked everything I can think of and tried two different working tubes in there, always with the same result. Any help greatly appreciated, and I'll buy you a pint of warm beer!