One tube of a quad failing

Tubes Asylum

Questions about tubes and gear that glows. FAQ

I have an Eico Hf-81 which has a matched quad of EH EL-84 output tubes. One tube is faltering, testing about 15% weaker. Do I need to replace all 4 tubes? Or could I swap in one new tube

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Kimber Kable

Topic - One tube of a quad failing - 2chblast 16:36:25 08/08/20 (3)

RE: One tube of a quad failing - tubemaze 03:58:36 08/09/20 (1)

RE: One tube of a quad failing - 2chblast 07:29:26 08/09/20 (0)

RE: One tube of a quad failing - airtime 18:15:38 08/08/20 (0)

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