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Old 17th June 2007, 05:09 PM   #11
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Join Date: Apr 2004
Location: Plainsboro, NJ
Quote:
Originally posted by Brian Beck
Jacco's linked photo shows dual markings: 6H8C and 6SN7. The data sheet for the 6H8C suggests a near equivalent to the 6SN7. Max plate voltage and dissipation ratings are lower, surprisingly. Whether the 6H8C shares the fabled linearity of the 6SN7, I can't say.

6H8C data sheet

The ratings may, in fact, be a non-issue. Look at the 6SN7GT data sheet. Notice that the dissipation limit is 2.5 W./section, when both sections are operating.

A 1930s vintage 6SN7 is not as tough as a 1950s vintage 6SN7GTB. For audio purposes, the difference is not important.
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