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Re: Displacement Current Revisited
On 03/15/99 11:51:43 you wrote:
[Terry, would you post my post to the list? I think it's important that
folks realize that different instruments are required to measure different
things. Thanks RWW]
>
>snip...
>>
>>Terry,
>>
>>At the 1998 TCBOR Teslathon Mark Rzeszotarski
>>demonstrated one of your planar antenna(s). Folks were most pleased
>>with his demonstration of the planar antenna(s).
>>
>>It's correct one is sensitive to the ES field. The other is sensitive
>>to the EM field and is 90 degrees phase shifted. Dispalcement current
>>plays no part here.
>
>Ok, I wasen't following the thread well so I was not sure... Glad to here
>people are finding the plane antennas usefull in their work!
>
>>
>>It's imperative that correct instruments are used to detect any of these
>>different Tesla coil signals. The instrument must be designed to detect
>>one and only one type of electrical "field" and reject the other.
>>
>>A differencing instrument electrometer with high CMRR (110-120 dB) will
>>reject essentially all EM signals applied to both inputs. It will easily
>>measure ES differential signals.
>>
>>A simple wide band RF antenna and amplifier will detect EM fields,
>>but not an ES field.
>
>The antennas ar far better than a simple peice of wire for sure.
>
>>
>>I put both types of pickups and amplifiers in a single cabinet so both
>>types of fields around a TC may be monitored at the same time. I mount
>>the two small PC boards on the back of the mounting screws of both meters.
>>They are very compact and the handheld instrument is quite portable.
>>
>>R. Wall
>
>Cheers,
>
> Terry
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