I just bought my first tube amp. It is a Traynor TCV40. I love the tone from it. I got it used and have two questions about it.

1. The reverb does not work and I know I could fix it. I'm just wondering if the problem is more likely to be a loose connection in the tank or in the amp. The two RCA cables are in attached fine.

2. The manual claims it is an auto-biasing amp and that I can just put any two 6L6s/5881s in there and not worry about it. Does anyone know if this claim is true? What if I wanted to put KT66s in there?