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SV6550C and Vg2 max.

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)


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