[Lowfer] Delta Loop (Was Active whip antennas and tree antennas)

[JJ]

Hi Bill,
No.  I never did try the ground stake.  I was going to but before I got 
the chance, I got the idea to turn the sloper into a loop.  I wish I had 
tried and I still can if I reverse the loop mods.
I don't have a ton of room here but enough for the loops.  The E-W is 
supported by a locust tree on the E-W property line.  The N-S loop is 
supported by a maple in the center of the yard.  Our lot is about 65' wide.
Nope, the loops are not tuned in any way.  Just fed straight with the 
9:1 balun.  I'm not even sure that the balun ratio is optimum but it was 
what I had on hand and it seems to work.  I have no idea how to figure 
what capacitance I need to tune the loops.  But I'd give it a go if I 
had a clue.
BTW:  No amps on the antennas and they are very quiet.

Jon

On 12/22/2010 2:50 PM, Bill Ashlock wrote:
> Hi Jon,
>
> Yes indeed, your sloper antenna is similar in principle to my tree antennas. Did you ever try a ground stake instead of the 75 ft of wire laying on the ground? Should have been some improvement at LF because the reactance to ground increases as the frequency-of-use decreases. Also I think you would have found a significant improvement in sensitivity if you had run the 75ft wire over the top of a tall tree and taken advantage of the conductivity of all of the limbs and branches to the received signal.
>
> Are you tuning those big loops in any way? Try that if you want to see some real sensitivity! Of course the tuning of a loop on a remote basis is never simple. Also on the negative side is the directional properties for a loop but your 'two loops' approach is a good one if one has the space.
>
> Bill
>