5814 instead of 12au7 - loud noise - erik

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5814 instead of 12au7 - loud noise

Folks, got a brand new set of RCA Command 5814a tubes for my Luxman cl-38uc, which uses the 12au7 variant, 5 of them actually. Now, with the 5814 I get very loud hum from both channels.
Is it possible that the 5814 variant is not compatible with this particular circuit or the tubes are simply bad (unlikely) ?
Thanks

Edits: 02/05/24

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Topic - 5814 instead of 12au7 - loud noise - erik 08:05:26 02/05/24 (6)

RE: 5814 instead of 12au7 - loud noise - f1jim@yahoo.com 15:08:22 02/07/24 (1)

RE: 5814 instead of 12au7 - loud noise - erik 18:24:16 02/07/24 (0)

When you put the original tubes back in, is it quiet? - Chip647 08:51:03 02/06/24 (1)

RE: When you put the original tubes back in, is it quiet? - erik 10:29:34 02/06/24 (0)

RE: 5814 instead of 12au7 - loud noise - opalize 09:20:30 02/05/24 (1)

RE: 5814 instead of 12au7 - loud noise - erik 10:35:38 02/05/24 (0)

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