NOS 6550 Longevity

Longevity NOS Tung-Sol Blackplates vs NOS GE 6550a in use?

williampowell01-29-2021 8:27pm

yogiboy Details Discussions Posts This discussion Message User 5,672 posts 01-30-2021 at 06:40pm Copy Comment URL Report Comment Edit Delete The same life span as any other power amp tube! Power tubes like EL34’s and KT88’s are good for about 2500 hours or more. But may go longer in an amplifier with a conservative design. Small signal tubes with numbers like 12AX7, 12AU7, and 6922, and rectifier tubes like 5AR4 may go 10,000 hours. So you get years and years of enjoyment.
millercarbon Details Discussions Posts This discussion 12,531 posts 01-30-2021 at 05:23pm Copy Comment URL Report Comment Edit Delete I can categorically state without a doubt they will last until they wear out.
williampowell OP Details Discussions Posts This discussion Message User 23 posts 01-30-2021 at 05:24am Copy Comment URL Report Comment Edit Delete Conrad Johnson Premier 11a
petg60 Details Discussions Posts This discussion Message User 1,486 posts 01-29-2021 at 11:59pm Copy Comment URL Report Comment Edit Delete Normally nos 6550 tubes would have a long lifespan, how much your amp pushes them is another point. G
tuberist Details Discussions Posts This discussion Message User 951 posts 01-29-2021 at 09:02pm Copy Comment URL Report Comment Edit Delete It’s impossible to answer that without knowing what amp you are using. I would suggest you consider contacting your amplifier manufacturer for their opinion