I've had my 2-channel H combo for a few days now and I'm very happy with the amp. Unfortunately, my biggest worry about combo amps has been confirmed and today I noticed some tube rattling. I play it reasonably loud (Volume 2 o'clock and Master at about 10 o'clock). The rattle is quite audible on both channels, lead and clean. The typical ringing rattle that we all hate to hear.
Both power tubes look ok, although one of them has a slight blue glow on the outside. However, I've read in the past the blue glow is not an issue. Once I've identified the culprit (tapping method) and replace the tube(s), what can I do to avoid tube rattle in the future? I realise a combo amp is not ideal for tubes and more prone to cause that problem. The build quality of the cab seems top notch and there's a separation between the chassis and the speaker area. Plus the tubes are facing upwards. PRS did everything right to avoid the rattle and yet it happened with my amp.
Are there specific tube brands that are sturdier?