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Question about valves running hours

I'm new to the tubes world and when I bought my amplifier the seller told me not to run it for more than 8 hours, letting it for rest a couple hours before the next listening session. I wasn't told why, but now I got curious and I want to know more about it. 
What's the reason for this limitation? What can we damage and why?
128x128migueca
jb2455's avatar
jb2455
16 posts
 
What amps are you referring too? I have not heard this recommendation before with any tube amp. Maybe he was referring to a break in period?

jb
rodman99999
6,125 posts
 
On/off cycles are much harder on any electronics, than hours.   Outside of heat, a tube's biggest enemy.   
czarivey
5,946 posts
 
For tube electronics, I completely agree. Tubes must rest. On/off cycle of tubes is relatively easy and lasts 5...10min. 
The advice of seller is RIGHT ON and should be followed.
Tubes run hot and dry out capacitors. 
Turn off tube electronics if you don't plan to listen to it for more than couple of hours
Turn off tube electronics before you go to bed and before living dwelling!!
This will assure longer life of your equipment.
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