>Hi,
>
>My specs say that the 4pr1000 tube needs 7.5v for the heaters, I've got a
>transformer from Dhal, but on testing the voltage with the tube in the deck
>I see I'm getting about 8.3v
>
>Is this too high?
>
? ... not for those who have a free supply of 4PR1000As. For those who
don't, 7.2v is mo' betta.
-- The math: Since relative emissive life of a thoriated tungsten
cathode is (E1/E2)^23.4, 8.3v/7.2v^23.4 = 27.8 x more emissive life at
the lower V.
have phun, Andy
- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
www.vcnet.com/measures.
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