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tube spec.



Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <mystuffs-at-orwell-dot-net>

hi all,
i have a large pentode that i can't find any info on and am hoping that
somebody (anybody!) can help me.
it is a: P.R.C. that has the shape of a 3-500z with a ceramic forced air
cooling base, the only numbers on it are: 947863, under that: made in
france and: 9952
this tube looks very durable and i would like to try a vttc with it,
also can anyone give me an idea of the air flow that might be used for
this type.
thank you in advance for any much needed info.
marc m.