Hello I’m new to this forum. I purchased a second hand DSL40CR and I love the tone and everything about it. However I get a weird wind like sound and an sometimes I’ll get popping noises.The master volume and volume are all the way down. It sounds like blowing in a microphone kind of. I tested the tubes and no noises came out of the speaker and the sound didn’t increase. However one of the pre amp tubes doesn’t sound like the rest. Maybe that’s the reason? Has anyone experienced this sound before? I’ve heard people say it’s something to do a resonator, caps, fuse, pre amp tube. I don’t want to spend a ton of money trying to fix it so if it isn’t a preamp tube and something bigger I’d rather take it back and get a new one. Thank you in advance. Although I am hoping it’s just a preamp tube.