Life Expectancy of a NOS 5751 Vacuum Tube


Hello,

Just curious, can anybody shed a light on how long a typical NOS 5751 vacuum tube last assuming normal use (2-4 hours a day)? I found the same info for the 12AX7 (same family or comparable to a 5751 but with higher gain)but not for the 5751. Your input is greatly appreciated.

regards
amandarae
Thanks "Newbee" and " Chams uk". I too bought some 5751 lately (Sylvania Gold brand 3 Mica Black Plate Goldpins, RCA Black Plate 3 Mica, GE Black Plate 3 mica, Raytheon, Tungsol etc.)and prefer to use it , than the 12AX7's, in my application.
If anything, it may be a tiny bit more I'd think. The gain on the 5751 is a bit lower, yes ?

But I happen to love 'em, using NOS 5751's now instead of 12AX7's.....
Life expectancy sould be about the same as the 12AX7 in the same application.