Fluctuating bias

Tubes Asylum

Questions about tubes and gear that glows. FAQ

I recently adjusted my bias to just under the recommended max of 49.5 ma, (recommended range 45-50)to my ears it sounds better the closer I am to 50 ma, I can lock all four KT88's in at that level with no problem, however, the next day after significant warm up,( one-two hrs.) I see where the bias has dipped to around 47.5 ma, everything sounds fine but I'm curious, is this typical and the bias will rise with extended play or could it be a sign of ageing Tubes? Thanks

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Kimber Kable

Topic - Fluctuating bias - Louder Boy 04:54:32 03/20/06 (6)

Re: Fluctuating bias - Bill O'Connell 14:37:49 03/20/06 (0)

Re: Fluctuating bias - Jim McShane 05:14:00 03/20/06 (4)

Re: Fluctuating bias - Louder Boy 06:40:31 03/20/06 (3)

Check out KIKO's posts.... - bluelobster 13:01:56 03/20/06 (2)

Make that "Kico" :-) (nt) - Kico 13:26:06 03/20/06 (1)

Sorry...nt - bluelobster 19:33:23 03/20/06 (0)

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