oldest tube(s) in your system

Please let us know what they are running in too. Thank you for your attention to this matter...ha!

2 x 1949 Sylvania ladder plate 6BL7GT (in monoblock amps, custom built 2 x 6BL7GT + 4 x KT77)

xenolith09-10-2025 1:28am

xenolith OP Details Discussions Posts This discussion Message User 193 posts 09-10-2025 at 04:24am Copy Comment URL Report Comment Edit Delete Zoiks; 82 years old! It’s not a competition, but wow, that’s old...and no doubt great.
xenolith OP Details Discussions Posts This discussion Message User 193 posts 09-10-2025 at 05:21pm Copy Comment URL Report Comment Edit Delete @audioman58 what kind of tubes are the RCA and Amperex and what are they in? Other oldies in our system are: 2 x 1952 Sylvania T-plate 6BL7 GTA and 2 x 1958 Western Electric D-getter JW 2C51.
xenolith OP Details Discussions Posts This discussion Message User 193 posts 09-10-2025 at 03:13am Copy Comment URL Report Comment Edit Delete @noromance Beautiful piece of gear! Thanks for sharing the photo. Love the eye tube too! Does it ’close’ (or is it open?) at 325v?
xenolith OP Details Discussions Posts This discussion Message User 193 posts 09-10-2025 at 07:07pm Copy Comment URL Report Comment Edit Delete Yea, I figure 45 or 2A3 or similar would be about the oldest tube type still heating listening spaces. Funny that as those are power tubes; would've thought signal tubes would be more likely to be oldest still in use. All of our power tubes are new production babies. And all of our signal tubes are older than me!