Best 3A5 / DCC90 / CV808 tubes?

I'm looking to pick up 4 of this tube type, but can't find much info on them, such as recommended ones to buy or even where to buy them at all.

Any help appreciated!

mmcgill82904-05-2024 8:08am

lewm Details Discussions Posts This discussion Message User 13,476 posts 04-06-2024 at 12:53pm Copy Comment URL Report Comment Edit Delete You can also buy them from reputable vendors. eBay is a crapshoot when it comes to tubes. I’d stay away entirely.
lewm Details Discussions Posts This discussion Message User 13,476 posts 04-06-2024 at 12:59am Copy Comment URL Report Comment Edit Delete It's meant for a high frequency oscillator use, at frequencies up to 40MHz, according to the data sheet. Jason, I don't know what made you think it had to be a pentode, with the designation 3A5. Not that it couldn't be, but why did you think it had to be? mmcgill829, What do you own in the way of audiophile gear that uses this type of tube? Apart from its very high frequency bandwidth, the other specs are not remarkably deviant from standard audio triodes. And the spec sheet does not indicate how it would operate in the audio band.
lewm Details Discussions Posts This discussion Message User 13,476 posts 04-05-2024 at 02:49pm Copy Comment URL Report Comment Edit Delete I don’t recognize any of those alphanumeric codes. What is it? Is it a 2A3 with an oddball filament?