Measurements using field probe
From: Bert Hickman [SMTP:bert.hickman-at-aquila-dot-com]
Sent: Tuesday, June 30, 1998 7:12 AM
To: Tesla List
Subject: Re: Measurements using field probe
Tesla List wrote:
> From: D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
> Sent: Monday, June 29, 1998 8:08 AM
> To: Tesla List
> Subject: Re: Measurements using field probe
> to: Bert
> It would not be reasonable to assume the 144 Ohm resistance for the 420 BPS
> of operation. This value would only be true for the first few firings of
> the cap as the "hot" resistance of the bulb is considerably less than its
> initial "cold" measured DC resistance. After a few seconds this value
> would be lower.
Actually, it would be closer to 13 ohms for the first few firings when
the filament was cold... it rises to 144 ohms only at full operating
temperature. A 10:1 resistance change is a bit non-linear for sure. I
wonder if a carbon-filament lamp would have less of a resistnace swing?
Would be a shame to blow up an antique bulbs tho...
-- Bert --