When to replace pre-amp tube?

Hi, I'm a tube dummy and want to know when would I need to replace the tubes on my MF Nu-vista M3 integrated amp. Thanks.

thuhaile08-25-2011 7:27pm

thuhaile OP Details Discussions Posts This discussion Message User 105 posts 08-26-2011 at 12:15am Copy Comment URL Report Comment Edit Delete Thanks. I believe it's the RCA nuvistor 6cw4 tube.
sebrof Details Discussions Posts This discussion Message User 834 posts 08-26-2011 at 01:06am Copy Comment URL Report Comment Edit Delete When you get curious as to how another brand or type will sound in your gear.
thorman Details Discussions Posts This discussion Message User 1,262 posts 08-26-2011 at 01:21am Copy Comment URL Report Comment Edit Delete If you think its been used for a long time and your not having any problems,thats the time to replace the tube..Much easier ( and less costly ) to just spend the money now and be worry free for a couple more years.......
swampwalker Details Discussions Posts This discussion Message User 5,138 posts 08-26-2011 at 02:40am Copy Comment URL Report Comment Edit Delete IIRC, the nuvistor tubes are very long lasting. Yep, here it is, S'phile review of Nuvistor amp says "Typical tube life expectancy is about 100,000 hours, and the failure rate, with almost 1500 Nu-Vista products now in the field, is "about 0.1%." So don't worry. " lets see, 100k hrs = 24/7 for 11.5 yrs.
slikric3000 Details Discussions Posts This discussion Message User 638 posts 08-26-2011 at 02:43am Copy Comment URL Report Comment Edit Delete About once a week.