These can’t be connected a reciever. They are inductively coupled. There
are construction articles for these online. I’ve copied Gary, the creator
of these so maybe he can link to the construction articles.

Paul

On Sun, Jan 30, 2022 at 7:34 AM Zack <w9sz.zack@gmail.com> wrote:

> Hi Paul,
>
> I know they are not commercially available. I am interested in building
> one myself. All the Youtube videos I have watched (about 15 of them) don't
> show any significant construction details. I am wondering if they can be
> made to work in the 137, 183 and 475 kHz ham bands and the LF NDB bands.
> And the videos I've seen show an FSL antenna that is just one coil with
> coupling to an AM receiver accomplished by proximity. How would I connect
> one to an SDR receiver that covers this LF range?
>
> Zack W9SZ
>
> On Fri, Jan 28, 2022 at 11:37 AM Paul B. Walker, Jr. <
> walkerbroadcasting@gmail.com> wrote:
>
>>
>> Look for it on YouTube. It’s not commercially available.
>>
>>
>> On Fri, Jan 28, 2022 at 8:36 AM Zack Widup <w9sz.zack@gmail.com> wrote:
>>
>>> I have not heard of the FSL antenna up till now. Is there a site
>>> somewhere with construction details? What kind of ferrite rod? (What is the
>>> best type of material? 61? 77?). Will these work in the LF range? (down to
>>> 100 kHz)?
>>>
>>> Zack W9SZ
>>>
>>> On Thu, Jan 27, 2022 at 1:48 PM Paul B. Walker, Jr. <
>>> walkerbroadcasting@gmail.com> wrote:
>>>
>>>> I have 2 5" FSL antennas and they do just that.. one can do reception
>>>> and
>>>> one can null. The 5" FSL's out perform box loops 3-4 feet in size.
>>>>
>>>> I didnt want to totally null things out in this case, to show an
>>>> example of
>>>> what I heard as I heard it
>>>>
>>>> Paul
>>>>
>>>> On Thu, Jan 27, 2022 at 10:40 AM Rick Kunath via groups.io <k9ao=
>>>> yahoo.com@groups.io> wrote:
>>>>
>>>> > Paul,
>>>> >
>>>> > I wonder if a 4-foot box loop (box not spiral, i.e. the NRC design)
>>>> > would let you null that offending station? You should be able to do
>>>> that
>>>> > using a combination of rotation in azimuth and tilting in elevation,
>>>> > then back and forth to get the null deep enough to take them out. Back
>>>> > when I had strong locals I was able to do that using that loop. You
>>>> ahve
>>>> > to be careful to get the loop balance just right. That's not hard to
>>>> do
>>>> > if you follow the directions. And then you get a good really deep
>>>> null.
>>>> >
>>>> > It might be worth a try and you'd have another tool.
>>>> >
>>>> > Have you tried tilting and rotating the FSL at all? Assuming the
>>>> > internal loopstick on the portable doesn't get any of the offending
>>>> > station. Otherwise nulling is harder. I would think that would work
>>>> the
>>>> > same way an air-core loop does. I know the ferrite bar loops I built
>>>> > back in the day worked that way.
>>>> >
>>>> > Rick Kunath, K9AO
>>>> >
>>>> >
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>>>> >
>>>>
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>>>> _______________________________________________
>>>>
>>>> THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed
>>>> and/or modified under the conditions set down in the Design Science
>>>> License
>>>> published by Michael Stutz at
>>>> http://www.gnu.org/licenses/dsl.html
>>>>
>>>
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