[Lowfer] VLF signals

[Eric Smith]

Very good .. thanks, Jay!  This is SO cool.  I'd sure like to get back
on the air again.

Thanks for your kind reply!

Eric kd5uwl

> On Jan 4, 2016, at 10:21 PM, "jrusgrove at comcast.net" <jrusgrove at comcast.net> wrote:
>
> Eric
>
> Conventional small loop antennas maintain their characteristic figure 8 pattern down through the VLF frequency range. Terminated loops, like the large K9AY used here, maintain their cardioid pattern down through VLF. I typically see F/B ratios of 15 to 20 dB at VLF. It's a bit more difficult to develop directional patterns at VLF with vertical antennas because of the required real estate.
>
> Jay W1VD  WD2XNS  WE2XGR/2
>
>
> ----- Original Message ----- From: "Eric Smith" <esmithmail at gmail.com>
> To: "Discussion of the Lowfer (US, European,& UK) and MedFer bands" <lowfer at mailman.qth.net>
> Sent: Monday, January 04, 2016 8:47 PM
> Subject: Re: [Lowfer] VLF signals
>
>
>> Hi, Garry,
>>
>> Rank noob here regarding VLF .. so please take it easy on me .. but is
>> there such a thing as a directive antenna at 12 kHz?  I would think it
>> analogous the (non-) directional nature of a bass drum at low audio
>> frequencies ...??
>>
>> Eric kd5uwl
>>
>>
>>> On Jan 3, 2016, at 8:00 AM, Garry <k3siw at sbcglobal.net> wrote:
>>>
>>> Good signals here from the 3 main alpha transmitters this morning. See those plus "RSDN F4" on Laurence's KL7L grabber. Don't see the signal presumably on 12.090773 kHz here. Perhaps it's off now or has a directive antenna aimed elsewhere. Also saw a burst on 21.1 kHz. In the evening that would be from one of the RLS transmitters but here in the morning signals come in from the Pacific so think it's RJS instead, located in Vladivostok. Can't see the signal on the KL7L grabber because its present tuning range doesn't go that high.
>>>
>>> --
>>> Garry, K3SIW, EN52ta, Elgin, IL
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