[Lowfer] Wm beacon testing tonight

[N8OOU]

Jay, Thanks for the operating info gathered from your previous tests. I 
will take it into consideration in my future builds. I don't consider 
your input a wet blanket, as I have no mileposts to judge forward or 
backward progress.

Implementing a large transmitting loop here is well within reason, but 
other less controversial designs can easily be accommodated too.  I want 
the station to operate as close as possible to the level of it's 
previous operator, but it must do so within my comfort level.  That's a 
major component in the beacon testing I am doing now.


73   de   N8OOU - Mike Meek

On 11/18/2014 09:56 AM, jrusgrove at comcast.net wrote:
> Mike
>
> Dug out my antenna notes on lowfer VD from many years ago. The antenna
> was 200' perimeter. The loop conductor was milspec RG-11 (excellent
> braid) using the outer braid as the loop conductor. Since the antenna
> could be raised and lowered with relative ease I also made measurements
> on 200' perimeter loops made from #12 and #8 copper wire to see how they
> performed. Analysis was based on measured antenna current which gives an
> accurate indication of antenna Rtotal. The Rtotals can then be compared
> to predict the dB difference between the antenna conductors. I also made
> some calculations based on other antenna conductors. RG-11 is the
> reference conductor at 0 dB.
>
> 1/4" Litz......................+1.3 dB
> 7/8" Heliax.................+ 0.9 dB
> 1/2" Copper tubing.....+0.4 dB
> RG-11............................0 dB
> #8 Copper.................-2.4 dB
> #12 Copper...............-3.8 dB
>
> You're #16 loop conductor is going to be even further down the list ...
> that plus the fact your antenna area is less than that of a 200'
> perimeter are going to make this a challenge. Keep in mind that on an
> Argo display a 1 dB difference in received signal level can mean the
> difference between barely visible and solid white line reception. Not
> trying to throw a wet blanket on your efforts ... just giving you an
> idea what to expect and what's possible.
>
> Jay W1VD  WD2XNS  WE2XGR/2
>
>
>
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