[OZAPRS] HF antenna on car - sorted

[Glen English VK1XX]

RRR Matthew !

gain...well, you just dont have the physical aperture available.

The best you might manage over salt water (vehicle on floats in the ) is 
3dB. (as there is no readiation below the nearly perfectly conducting 
surface)




On 5/12/2017 10:58 AM, Matthew Cook wrote:
> Thanks for sharing that URL....
>
> He is very wise and had my attention from;
>
> "There are */no/* viable methodologies to achieve positive gain with 
> an HF mobile antenna"
>
> So true.  I actually tested one of the first prototypes of that 
> Stealth Telecom loop that George made, funny he came to the same 
> conclusion.
>
> 73
>
> Matthew
> VK5ZM
>
> On 5 December 2017 at 09:59, Glen English VK1XX 
> <glenlist at pacificmedia.com.au <mailto:glenlist at pacificmedia.com.au>> 
> wrote:
>
>     yea, essentially, RF wise, without  strap = without ground
>
>     which is nearly exactly like without the negative lead of a light
>     bulb connected = no light...
>
>     Dont expect miracles with a base loaded 1.4m whip.
>
>     Expect efficiency to be around 10%
>
>     rather than keep writing, Andrew, there is this compendium online,
>     worth a read :
>
>     http://www.k0bg.com/myths.html
>
>     it's pretty right. Alan is a good engineer with a practical
>     understanding.
>
>
>
>     On 5/12/2017 10:14 AM, Andrew Rich wrote:
>
>         Without strap - 5.06:1 at 10.147 MHz
>
>         With strap - 1.16 : 1 at 10.147 MHz
>
>         Now we are cooking with gas
>
>         Andrew
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