[600MRG] Vacuum variable capacitor, low-pass/band-pass filters

[Gedas]

Frank, I thought I would post this to the group rather then reply 
directly to you as it may help some others out.

This is very similar to the antenna I put up several weeks ago but have 
not tested yet. Mine is a little larger but essentially the same idea to 
get some vertical polarization. In any event, below is a screen capture 
of the estimated conditions at the feedpoint if driven with 100W. As you 
can see, being such a small antenna, the real (resistive) portion of the 
feedpoint impedance is extremely small and it is quite reactive (which 
we all expected). Hope this helps.

Gedas, W8BYA

Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.

On 6/22/2019 7:15 PM, Frank O'Donnell wrote:
> Hi Gedas,
>
> Thanks for the very kind offer.
>
> I'm looking at putting up a rectangular loop with these dimensions:
>
> 25 feet from side to side
>
> 30 from bottom to top
>
> bottom is five feet above the ground
>
> feed point is at the center of the bottom leg
>
> loop is constructed from 14awg wire
>
> It will be fed by a 100w class D amplifier
>
> Attached is a sketch that summarizes the dimensions.
>
> I'll be interested in the outcome from your model.
>
> Thanks and 73,
>
> Frank
>
>
>
>
> On 6/22/19 3:16 PM, Gedas wrote:
>>
>> Frank John is spot on.....it ALL depends on the length and 
>> configuration of your antenna and how much applied power you use. 
>> That will determine the current & voltages.
>>
>> if you e-mail me a accurate diagram with dimensions of your proposed 
>> antenna and how much power you plan to run I will be happy to model 
>> the system and get you a ballpark value to start out with.
>>
>> Gedas, W8BYA
>>
>> Gallery athttp://w8bya.com
>> Light travels faster than sound....
>> This is why some people appear bright until you hear them speak.
>>
>
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