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I bought five of these tubes back in the early to mid 1990s. I distinctly remembering one of them arcing the first time I put it into service back then. Two may have arced, since I only have three left. I packed them away, and after numerous moves, they stayed packed away. Meanwhile I've used Russian 5AR4 in the same amp, and never had an issue.
I got them out last night, and after taking a good look at them, they don't look like any 5AR4 I've ever seen before. I did an extensive search here, as well as an Internet images search, and couldn't find anything with the same internals, or even the brown base. There's no markings on the glass, no date codes or other markings on the base, other than what's shown.
I might not be as concerned, but given the memory of the self-destruction the last time I tried one, I'm curious if these are counterfeits.
Thanks.
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Topic - Sylvania/Philips 5AR4 - 1973shovel 12:14:45 08/26/21 (19)
- Looks Like a Bendix 6106 (5Y3-ish) - opalize 13:27:00 08/26/21 (15)
- Isn't there another indirectly heated 5y3? nt - Tre' 09:22:57 08/29/21 (6)
- I use Mullard GZ-32s in my WrightSound Mono 8s - Chris Garrett 11:12:03 09/02/21 (0)
- RE: Isn't there another indirectly heated 5y3? nt - Eli Duttman 06:22:50 08/30/21 (0)
- They made a GZ32....... - Alpha Al 18:06:06 08/29/21 (0)
- And to further muddy the waters - 1973shovel 09:58:48 08/29/21 (0)
- found it, 6087 nt - Tre' 09:30:20 08/29/21 (1)
- or the 5v4. That's the one I'm running. nt - Tre' 09:33:41 08/29/21 (0)
- Now that I know what they are... - 1973shovel 16:48:17 08/26/21 (1)
- Glad to help! - opalize 17:02:56 08/26/21 (0)
- I believe you've nailed it - 1973shovel 16:21:45 08/26/21 (5)
- This is Their Revenge - Triode_Kingdom 22:00:56 08/27/21 (4)
- I never heard about that incident - 1973shovel 05:50:29 08/29/21 (2)
- I was late to that party. :( - Triode_Kingdom 10:25:09 08/29/21 (1)
- That party didn't last very long... - Steve O 16:22:09 08/29/21 (0)
- RE: This is Their Revenge - sony6060 08:00:19 08/28/21 (0)
- RE: Sylvania/Philips 5AR4 - pictureguy 13:09:43 08/26/21 (2)
- Those do work, thanks - 1973shovel 16:19:14 08/26/21 (1)
- RE: Those do work, thanks - pictureguy 16:48:17 08/26/21 (0)