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Re: it will be fine, modeled with 83

Ed -

500vdc/50ma should be easy - my B+ is 825vdc, at 120-200ma depending on bias.

I don't think the current is nearly as much as an issue with the voltage. Probably 1/2 of the 866jr's I've tried arc over at 400-600vdc. The older tubes tend to be worse - globes tend to be worthless.

To get to 825v I had to pre-warm the 866jr's for 2-4 minutes depending on ambient temperature, and slow start them with a damper diode "a-la Slagle".

I wonder if they might be "gassy" although I have no idea how to test that in a Hg vapor rectifer.

- Gary



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  • Re: it will be fine, modeled with 83 - Gary Kaufman 12/10/0408:48:21 12/10/04 (2)


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