I found a Fender Blues Jr. Emerald and was smitten with the way it broke up. It's a 15w with a celestion v30. This is my first experience with a low watt tube amp and I'm a little confused by a particular phenomenon that is occurring. There is this sort of flux sound that happens for short periods of time but only occasionally. Half the time it just sounds fantastic. Then for apparently no reason itll start doing this strange thing, almost trem-like but not affecting the volume. Its more of a variation in gain. I played it a few days ago to get a better feel for what's goin on and it was behaving differently than when I had played it last. I knew I wasn't crazy cause my girl was there and vouches for my description. This time when I played, it was making the noise consistently. It's a white noise and I didn't hear the tremolo thing I was hearin earlier. The noise isn't real loud and is actually a little quieter than the hum of my single-coils. Occasionally there are some squeaks and other strange inconsistencies. It's not even noticeable when I play the Gibson through it. I took it to work with me to use a different single-coil. I was wondering if there isn't something wrong with my Strat that isn't noticeable through the 50w Bassman I have. I had someone put Texas Specials in and I'm hoping it's not a problem there. At work, I tried it with my friends G&L. It sounded fantastic. I couldn't reproduce any of the noises that were happening in my room. My boss said it might be the type of lighting that I'm using in my room. So I brought it home and turned it on. Immediately it started doin the original flux thing I was talkin about. So I play it for a second to be sure then I turned the volume all the way down to walk over and turn off the light, and when I got back to my amp and turned it up again to play, the noise was gone. I flipped the light switch on again to see if it'd start up again and the noise didn't come back. I'm wondering if my inexperience with lower watt amps is the culprit. lol Is there a noise floor on amps that's higher with lower watts? Do low watt tube amps ever just make funny noises for a couple minutes while they warm up? Am I being paranoid? I'm reluctant to take it back and part with a good amp if this is just my ignorance. Advice, please.