First, try a different speaker.
Second, reach around back and plug both ends of a guitar cord into the loop in and out.
You should be peeling wallpaper with that amp.
The Blue Angel uses a pair of 6V6s, a quad of EL84s and a rectifier tube. You can use just the 6V6s, just the EL84s or both together. The rectfier tube is always on. However, it is a one channel amp with no master.
I use a Weber mini-mass to achieve delicious saturated overdrive at low volume...
larbiere, I spoke to Rich at the Mesa factory repair facility about the really loud hum and high noise floor in my Blue Angel. His explaination was that the earlier amps had a noisey effects loop problem that was corrected in a later version (no serial number cutoff was mentioned). He said there...
Dr. Tweedbucket is a great seller and does pack Bombproof!
In January I bought Blue Angel #005 from him and it was packed in a partial wood crate with the thickest cardboard sides I've ever seen.
The amp was/is perfect and exactly as described.