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Does anyone really familiar with RCA 5691 tube? I have bought a pair of RCA 5691 (listed as new) recently, adding to the 3 pieces I already have.
On the top of the new pair, there are dark emission or burned marks, which the seller has advised that it is the process of getter flashing that made these marks and not becos of heavy usage. Please advise if you are familiar with this tube. Thank you!!!
You can see my 3 pieces on the left and this new pair on the right.
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Topic - RCA 5691 Vacuum Tube - tlowe 10:33:35 07/22/21 (14)
- RE: RCA 5691 Vacuum Tube - baileyler 05:45:58 07/23/21 (1)
- RE: RCA 5691 Vacuum Tube - tlowe 06:45:09 07/23/21 (0)
- RE: RCA 5691 Vacuum Tube - Triode_Kingdom 16:39:52 07/22/21 (1)
- RE: RCA 5691 Vacuum Tube - tlowe 21:49:31 07/22/21 (0)
- RE: RCA 5691 Vacuum Tube - Tre' 11:01:12 07/22/21 (9)
- RE: RCA 5691 Vacuum Tube - garymuffley 16:40:44 07/22/21 (7)
- RE: RCA 5691 Vacuum Tube - tube wrangler 09:02:51 07/24/21 (6)
- RE: RCA 5691 Vacuum Tube - Tre' 07:40:58 07/27/21 (3)
- RE: RCA 5691 Vacuum Tube - tube wrangler 22:12:58 08/12/21 (0)
- RE: RCA 5691 Vacuum Tube - tlowe 10:06:27 07/27/21 (1)
- RE: RCA 5691 Vacuum Tube - Tre' 12:53:24 07/27/21 (0)
- RE: RCA 5691 Vacuum Tube - tlowe 22:43:05 07/24/21 (1)
- RE: RCA 5691 Vacuum Tube - Tre' 07:34:50 07/27/21 (0)
- RE: RCA 5691 Vacuum Tube - tlowe 11:13:34 07/22/21 (0)