tube's tempdrift

[SemperFi]

I've tried this at audioasylum, but no response.

Is there a temperature drift constant(or something close)for tubes? Like BJTs have tempdrift of 2mV/K.

Thanks.

 

[Thatch_Ear]

Most tubes will not show a correct bias when first turned on. A 45 minute run time seems to be a good average of warm up before measurements are valid. I have no idea if this is what you wanted, but there it is.