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

[Bill Ashlock]

Jon,

I'll give you a predicted capacitor size but need to know what frequency do you want to try, first.

Bill

> Date: Wed, 22 Dec 2010 15:22:11 -0500
> From: jhjesse at verizon.net
> To: lowfer at mailman.qth.net
> Subject: Re: [Lowfer] Delta Loop (Was Active whip antennas and tree antennas)
> 
> 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
> >
> 
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