I have a set of Tung Sol tubes in my HT 1R combo. They are about a couple of months old and recently when infirstboower the amp up! there is a bit of static/noise going on for about two minutes. Is this a sign meaning Thatbthe amp needs new tubes? Once the amp warms up, the noise disappears. I have heard this same noise from other amps that I've owned over the years.
Classicplayer