To avoid covering the entire thing, I sent my original Walkabout Scout in for the warranty update (the tweeter self-oscillation issue), and the repair was shoddy. I since have been given an entirely new Scout that was manufactured with the updates. I've noticed one thing different though. Where the old Scout would take a few seconds to warm up, then allow sound through as the preamp tubes were still getting going, the new one takes several MINUTES for anything to happen at all. Total time for the old one to warm up was 15 seconds or so. Total time for the new one has been over 3 minutes before any sound came out of it. Everything sounds fine and is connected correctly. I was wondering what might cause this, or if it's typical of the new updated Walkabout heads? Once it's warmed up, it sounds fantastic as usual with no lack of volume or difference in tone. It just takes a long time to get started. Thanks for any help.