SV6550C and Vg2 max.

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I was curious about some Ultralinear designs where a SV6550C tube, despite the 400 Volt max voltage rating of G2 is used.
How critical in fact is the use of 6550C type tube, in for instance a Dynaco MK3, where the voltage on G2 is far more than 400 Volts DC?
Might this be a case where one can exceed the rating on a specification sheet and not cause any noticeable harm to the 6550 tubes? Or is this a disaster waiting to happen?
Should I stick to KT-88 and KT-90 instead for Ultralinear designs and other configurations with more than 400 Volts on G2?

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Topic - SV6550C and Vg2 max. - shermanr@prw.net 07:09:05 08/08/06 (5)

Re: SV6550C and Vg2 max. - Jim McShane 08:49:10 08/08/06 (4)

Re: SV6550C and Vg2 max. - shermanr@prw.net 13:02:16 08/08/06 (3)

Re: SV6550C and Vg2 max. - Jim McShane 15:29:15 08/08/06 (2)

Re: SV6550C and Vg2 max. - shermanr@prw.net 12:33:29 08/10/06 (1)

Re: SV6550C and Vg2 max. - shermanr@prw.net 06:58:46 08/11/06 (0)

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