I agree with Brf. I've never seen anything I would call "red glow" from any of the 845s I've used in my SET monoblocks. Dave
Is the red glow normal for 845 tubes?
Hope to get some help about the red glow from a Bel canto SETi 40 845 tubes. Is this red glow normal? Do this tubes (Sino graphite plate) suppose to glow red after about 25-30 min. After turning off the amp the glow last a couple of minutes. I am just worried that the tubes may get damaged or the amp itself. Is this glow the result of the tube dissipating heat? I know this tubes suppose to dissipate about 70W and I worried that the amp "tries" to dissipate more heat that they can handle. Thanks in advance for your help.