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*To*: tesla@xxxxxxxxxx*Subject*: Re[4]: Terry filter*From*: "Tesla list" <tesla@xxxxxxxxxx>*Date*: Mon, 07 Mar 2005 18:58:28 -0700*Delivered-to*: testla@pupman.com*Delivered-to*: tesla@pupman.com*Old-return-path*: <teslalist@twfpowerelectronics.com>*Resent-date*: Mon, 7 Mar 2005 18:59:30 -0700 (MST)*Resent-from*: tesla@xxxxxxxxxx*Resent-message-id*: <mpJTiC.A.jrF.BcQLCB@poodle>*Resent-sender*: tesla-request@xxxxxxxxxx

Original poster: Sebastiaan Draaisma <sebas@xxxxxxxxxxxxxxxx>

Chiang Mai, Tuesday, March 8, 2005

In reply to: Terry filter Posted by: Posted on: Tuesday, March 8, 2005

Hello Gregory, Thank you for this information, good and easy explenation! :)

Best regards, Sebastiaan Draaisma

Tesla> Original poster: Gregory Hunter <tesla_39560@xxxxxxxxx>

Tesla> It is a simple formula: the voltage (E) across a Tesla> resistor (R) is equal to the product of the resistance Tesla> times the current(I) through the resistor (E = I x R).

Tesla> Suppose you applied the output of a 15kv/60ma NST Tesla> across a 1000 ohm resistor. 1000 ohms x .060 Amps = Tesla> 60v. Even though the NST can produce a potential of up Tesla> to 15kvac, the 1000 ohm resistor will never "feel" Tesla> more than 60vac. 15kvac is what the NST can produce Tesla> when open-circuit. Across a non-reactive load, the Tesla> voltage will decrease as the resistance decreases. The Tesla> most extreme example is if you simply short the two HV Tesla> leads together. At zero ohms, the voltage will drop to Tesla> zero and the current will self-limit to 60ma.

Tesla> This is very similar to how an NST works when it is Tesla> connected to a neon sign. When a neon sign is first Tesla> switched on, the neon fill gas is essentially an open Tesla> and the NST voltage quickly spikes to 15kvac. However, Tesla> as the high potential ionizes the neon, it gives off a Tesla> pretty glow, and its resistance quickly breaks down. Tesla> The voltage across the lamp falls to about 800v. This Tesla> is sufficient to maintain the 60ma conduction once it Tesla> has gotten started. From then on, the NST behaves more Tesla> like a ballast than a high voltage power supply. The Tesla> NST is really just a self-starting luminous tube Tesla> ballast.

Tesla> Does that help any?

Tesla> Greg

Tesla> --- Tesla list <tesla@xxxxxxxxxx> wrote:

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