[NJARC] Mystery radio

[Harry Klancer]

Steve, Jim and Mike,

Umm. Interesting thread, and I'm really rusty on this, but it seems to me
that 720 VAC (rms) or, if you flip over alternate peaks, 360 VAC (rms)
is actually about 360 x 1.414 ~ 509 v (peak). If you lose 50 v to the
rectifier, you still have about 450 v (peak) or, still assuming full-wave
rectification, approx. 450 x 0.707 ~ 350 V which should be the effective dc
value. I am using the peak to rms relationship of a sinusoid here, with the
0.707 value. If you were doing half-wave rectification, it would be
450 x 0.5 ~ 225 v. Or I could be wrong, and the factor could be 0.636 which
is the peak to average value.

I'm not sure about this last part, but I'm confident in the first part about
the 450 V peak value. So, I don't think we're there yet on the transformer
question.

Or maybe it's just the result of 40 years of brain rust on this end.

                                                     Harry K




At 2/15/2006 10:31 AM, you wrote:
>Visit our web site - See http://www.njarc.org
>_______________________________________________
>Hi Jim & Mike:
>
>Thanks guys...
>
>Looks like the numbers are real close..interesting to see the tube sucking up
>50 volts too...Good math there Jim...I learned something.
>
>Mike - you sure put me onto a good reference web site....thanks.
>
>Now....how & where can I get these tubes tested???
>
>R,
>Steve
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