Re: Terry's New Plane Wave Antenna

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Grishka <ghome@xxxxxxxxx>

Hello Terry,

>The antenna's ground plane is grounded through the cable to
>the scope chassis

I understand this, but - if the scope is grounded directly?

And - you wrote:

"If smaller input impedances are available, the frequency response 
can be extended further"

Pretend a situation - we take, say, an 1M input scope, put the 
T-connector to its input, 50-ohm
terminator and antena to the free side. We`ll lost some sensibility, 
but I wonder - how much times
would the bandwidth increase? 1000000/50=20000 times?





> Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>

> Hi,

> The files you mention are up to date.  The antenna will work with any
> scope.  The antenna's ground plane is grounded through the cable to
> the scope chassis.

> Cheers,

>          Terry


> At 06:31 AM 12/20/2005, you wrote:
>>Hello Terry,
>>
>>I got interested in your "Large Wide-Bandwidth Plane-Wave Antenna",
>>described here:
>>
>>http://hot-streamer.com/temp/PlaneWave.pdf
>>
>>and here:
>>
>>http://hot-streamer.com/TeslaCoils/MyPapers/planant/waveant3.html
>>
>>I`m going to take some measurements of my VTTC with this unit (I
>>haven`t build it yet).
>>Everything seems to be in order, but - you use Tektronix TDS210, as
>>i see from the photos
>>this o-scope is very small (battery-powered perhaps?) Mine o-scope
>>was made in USSR, it
>>has a massive _metall_ chassis (signal ground - one signal wire is
>>tied to the chassis),
>>and it`s energised by the mains.
>>
>>So, does all your system has the "floating" potential, or it`s
>>connected to the ground
>>anywhere? See - the whole capacitance of my scope chassis is not
>>very small - can it
>>influence the measurements anyway? And, maybe there`re some new
>>revisions of this
>>antenna after this one:
>>
>>"The new one is larger, quieter, better bandwidth, tougher, easier 
to make..."
>>
>>http://hot-streamer.com/temp/PlaneWave.pdf
>>
>>?
>>
>>
>>
>>--
>>Best regards,
>>  Grishka                          mailto:ghome@xxxxxxxxx




--
Best regards,
 Grishka                          mailto:ghome@xxxxxxxxx