I'm working on a Pioneer SA-6700 amp that's blowing fuses. I was given a tip by another AK expert member (thank you very much) that the protection circuit in this is very different than in many amps. He said to pull the thrystor to get things stabilized without it in circuit. I took the thrystor out of the circuit. The fuses stopped blowing whether plugged directly into AC or using the DBT. With the thrystor in circuit, the bulb on the DBT was BRIGHT so I shut the unit off immediately -- no magic smoke or flames. Anyway, here's my question: The thrystor in question, according to the data sheet, has three leads. The first two are called terminals and the third is the gate. When I check the two terminal legs using an ohm meter I get continuity - ZERO ohms resistance - in both directions all the time. Is this normal in a thrystor or does this indicate (along with the brightly glowing bulb in the DBT when this component is installed) that the thrystor is bad? Or does it indicate nothing certain? I know this is probably a novice question to some of you, but that's what I am, and that's why I'm here.