[Lowfer] Lowfer JH Loop Experiment

[John Andrews]

John,

This recalls an experiment that I did in early 2002. I made up a 12-foot 
on a side diamond-shaped loop, using four #8 THHN wires, with PVC cross 
fittings (holes drilled thru the PVC) to keep the wires separated. If 
you were to bunch the wires together, the skin effect would apply to the 
bundle, and not to the individual wires. Hung the thing from a tree 
branch, and stretched it out to nearby trees. The impedance as measured 
on the old GR bridge was 0.2 +j18.2 Ohms. Antenna current was 2.1A.

The results were not impressive: Dex (in NC) did copy some fragments in 
DFCW60, and had some complete copy in WOLF. That was the farthest it got 
-- sigs around New England were OK, though many dB below Bill Ashlock's 
200' perimeter copper pipe loop antenna.

I called it the "LL" (legal loop), as it appeared to meet all aspects of 
Part 15. Took it down after a month or so, and put up a larger loop (the 
Less Legal Loop) which I used here until Bill and I put up the big loop 
for my experimental license a few years later.

I've always wanted to duplicate the experiment with big copper -- maybe 
2" or 3", but never managed to make the investment. A 50' piece of 
flamed-out 3" Heliax would be great - who cares what condition the 
center conductor and dielectric are in...

John, W1TAG

On 11/29/2021 9:58 PM, John Hamer wrote:
> Mike,
> 
> I actually have some pretty good size litz wire. It looks to be around 3 or
> 4mm diameter.  Ill see if there is a label on spool with more information.
> I'm not sure if the spool came with the wire.  I got it from my last job
> years ago when they were trashing it.
> 
> I still have everything breadboarded, so I'm not sure if that is causing
> any issues,  but I will solder it all together in the next few days
> 
> John
> 
> 
> On Mon, Nov 29, 2021, 9:52 PM N8OOU <n8oou at meekfarm.us> wrote:
> 
>> John,
>>
>> Good to have another loop experimenter. I am curious about what you are
>> using for the loop conductor. My experiments have shown the larger the
>> conductor, the better.
>>
>> Good Luck
>>
>> 73   de   N8OOU - Mike Meek
>>
>> On 11/29/21 5:17 PM, John Hamer wrote:
>>> I have a 12'x12' square loop setup. I am transmitting my usual mode of
>>> qrss60 and a graphic on 181.818KHz. I just got it going tonight and still
>>> have some work to do, but if you are looking for a challenge, give it a
>>> shot! It is aimed in the N/S direction.
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