Rick Lee
Well-known member
I retubed my SLO with Sovtek wafer bottoms back in Nov. I probably ran it a good seven hours while biasing, checking drift and adjusting until it stayed where I wanted it. Haven't played it much since then, maybe 1-2 hours at most. Last week I turned it on, but with standby off and noticed the blue jewel was flickering. I had forgotten to plug the cab into the head, but it was still on standby. Today I had the OD volume up to 5 and, after about five min. the 1A fuse went. All tubes still glow evenly. I replaced the fuse and fired it back up. Blue jewel still flickered, but even with volume at 5, I played about 10 min (earplugs in) and fuse didn't blow. Do I have a bad power tube?