6SN7 odd behavour?

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I am running a philips 6SN7 in each of my Audio Note mono block SET amps. The left tube is lighting up in 2 places at the bottom of the tubes, and in 2 at the top where the wires come over the top of the plate. On the right tube, it only lights up in 1 place at the top.
Maybe the tube was manufactured with shorter heater wire on one side? Any ideas.
They both sound fine, no noticable difference. Shall I dump the tube?

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Topic - 6SN7 odd behavour? - astrostar59 13:44:27 02/23/07 (1)

Re: 6SN7 odd behavour? - Len_ 13:51:42 02/23/07 (0)

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