Hi here’s some random babbling . I use a meter with a digital readout . Most of the tube amps I’ve biased require that you short the input , I use a rca with a jumper soldered down the center to ground , and then just soldered to the positive shoulder . In the last year I’ve had a Winged “ C “ 6550 flash over cracking the glass, with no damage to the amp . Then a few months later , a New Gold Lion KT-66 arched and blew out the capacitors and a 5 watt resistor in the power circuit . They exploded with enough force that it broke the wiring terminal that was holding them . After two hours with tweezers and a Q-Tip removing paper, foil and oil, I packed the amp and sent it back to Dennis Had . He fixed it for free , after my warranty had expired and didn’t want to charge me . He stated that the me the tube was the cuprite , as I marked the power tubes and sent them along . He also stated if my amp wasn’t repairable , he’d build me a new one . But he no longer has Cary and works from his home shop . He’s a class act and we always talk about God . I’m sorry you’re experience was less rewarding . But having grown up with Dynaco gear , I’ve ruined my share of stuff . And have experienced many variables I didn’t expect . But I’ve always learned from others by asking . Happy listening, Mike .
