Hi Guys, I need some trouble shooting advice.
I had a power tube short out, and a fuse blew on my MKV. I bought 4 new 6l6s, a new fuse(4A SB), installed all, hit the bias switch to 6l6. Fired it up and it sounded great for about 45 mins, then I heard a low hum, then the fuse blew again and...