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Burn-in time for a Shuguang 845B tube?

About how many hours does it take to burn-in a Shuguang 845B tube? Can I expect a big change in sound as time goes by? Right now I have logged about 30 hours on a pair of 845s and the sound is still rough in the edges but I like more thant the regulars 845 (not B o C). The tubes are installed on a Bel canto SETi40. Thanks in advance for your comments.
tiofelon

Showing 2 responses by chuckie

chuckie
74 posts
 
Hello Brf
I was wondering about your advice about the 845 tubes should not be left unattended...does this also apply to the 211 power tube? Normally, I don't leave my amps unattended by leaving my home but sometimes I am in another room. Does this apply about being in another room? Are these tubes generally more volatile? I have two in each mono amp. Thanks!!!!!
chuckie
74 posts
 
Brf
Thanks,for the info I am sure it will be helpful to someone besides myself. My amps are self biasing and I will be more diligent when listening.
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