Re: Terry's New Plane Wave Antenna

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>

> Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

> 4. For the calibration to be valid, the field distribution needs to
> be the same as for the conditions that are to be measured.

if so, then the next logical question is "on what does the field
distribution depend"?

>   Seems
> like calibrating at NST voltages with 60 Hz would work just fine if
> streamers and corona did not happen to distort the e-field from what
> exist at 60 Hz. Not sure about this so please comment.

i`m not sure too, but it appears to me that much stronger fields
(working coil) should have noticeably different configuration than
weaker ones (nst), coz they must interact with surroundings far more.
maybe i`m mistaken, but it is my main concern for today.
and it`s even worse coz i can`t simulate it - bela and e-tesla can only do
axisymmetric cases :-(

btw - "if streamers and corona did not happen to distort the e-field"
but i wanted to use the antenna exactly for observing the breakdown
transients - not only to measure top voltage just prior this.

> Question:

> What does the low frequency cutoff (10-15Hz) affect??

it affects flat top, but probably i exaggerated this too much - at
least for the transients associated with individual discharges - they
are just too fast for this %-)

> I tend to worry about transmission lines that have little to no
> termination at both ends cause reflections can linger a long time and
> affect subsequent measurements (even if rise time is greater than the
> "bounce" time).

i`m not sure again, but if you are not using "50 ft long coax cable"
as D.C. did, there probably must be no any "waves" even at 100MHz, and
any ringing would be suppressed in "small 1/8W carbon resistor" as
Terry said?

p.s.
guys - we can theorize endlessly, but don`t you think that _only_ real
way to find an answer at least for the question about validity of nst
calibration (the question number 4) is to ask and wait until Marco
compared results for low/high fields with his resisrive divider?
%-)

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Let the bass kick! =:-D