I have a question for you tube (valve) experts out there:
In the pics I have a new Chinese stock tube (first top tube) and an Amperex tube (bottom tube). I'm not even sure what oxidation on tubes looks like, but can you tell me if the Amperex tube on the bottom would benefit from using a product such as DeoxIt?
The reason I ask is I heard a little bit of crackling last night while listening on my tube amp and I was curious if the Amperex tubes should be cleaned? I don't think it was the headphones. I just want opinions before I go spend 17 bucks on a little bottle of DeOxit when I may not really even need it. I haven't heard the crackling since last night.