[Lowfer] 8 KHz bandwidth for 6 lowFER stations 11-24-20

[jrusgrove at comcast.net]

One problem when running a wider receiver bandwidth will be incorrect reported s/n ratios of digital 
signals.... which are normally calculated in an ssb bandwidth. Not that there are many digital 
signals in the lowfer band ... and most folks probably  aren't worried about a few dB discrepancy. 
Just sayin' ;-) .

Jay W1VD


----- Original Message ----- 
From: "Douglas Williams" <williamsdoug1966 at gmail.com>
To: "Andy - KU4XR" <ku4xr at yahoo.com>; "Discussion of the Lowfer (US, European,& UK) and MedFer 
bands" <lowfer at mailman.qth.net>
Sent: Wednesday, November 25, 2020 9:19 AM
Subject: Re: [Lowfer] 8 KHz bandwidth for 6 lowFER stations 11-24-20


> That's pretty cool, Andy. Guess that shows that the software doesn't
> necessarily require narrow CW filters in order to work properly.
>
> On Tue, Nov 24, 2020 at 11:32 PM Andy - KU4XR via Lowfer <
> lowfer at mailman.qth.net> wrote:
>
>> Hi all:
>>
>> Just for kicks, ( and pleasant surprises ), I set the IF bandwidth on my
>> TS450S to 12 KHz; curious to
>> see if it really would receive that wide, AND, could I see 6 lowFER
>> stations in a 7.2 Khz Bandwidth.
>> The SpecLab Filter Control Window showed visible audio response to 10.5
>> KHz.
>> I was pleasantly rewarded with results. The target beacons were; JH, WM,
>> SIW, TAG, KE, and EAR.
>> *** If there are other eastern lowFER's on the air, I'm not aware of them.
>> ***
>> The Viewer Softwares required higher Audio Sampling rates to see the
>> Higher Audio Frequencies.
>> Monday night ( 23rd ) the static was 5 dB over S-9 but I still saw bits
>> and pieces of JH, WM, and EAR.
>> Tuesday night ( 24th ) the static was very low, and propagation was OK,
>> but not great. Results were much better.
>> *** KE is Off Air for TX rebuild, and Propagation just wasn't good enough
>> to pull out TAG. ***
>> The radio dial is at 181.610 KHz - USB
>> JH - 181.818 KHz is at 200 Hz using Argo
>> WM and SIW - 185.300 KHz is at 3690 Hz using SpecLab
>> SIW - 185.185 KHz is at 3575 Hz using WSPR-X ( WSPR15 ) BFO at 3455 Hz
>> TAG - 185800 KHz is at 4190 Hz using WOLF10
>> KE - 187.304 KHz is at 5690 Hz using Spectran
>> EAR - 188.830 KHz is at 7220 Hz using Spectran
>>
>> Screen shots of JH, including a " hic-up " along the way:
>> https://www.dropbox.com/s/qcvtxyueehvot5s/JH_11-24-20.bmp?dl=0
>>
>> Screen shot of SIW in WSPR15 ( can't do OP32 due to no option to change
>> BFO Offset to higher frequencies )
>> https://www.dropbox.com/s/2tj3wyysxtsj75j/SIW_WSPRX_11-24-20.bmp?dl=0
>>
>> Screen shots of WM in the Wateringhole:
>> https://www.dropbox.com/s/tqij6dayahhcak8/WM_11-24-20.bmp?dl=0
>>
>> Scren shots of EAR on the high end of the spectrum:
>> https://www.dropbox.com/s/9v6m36au0rkcq08/EAR_11-24-20.bmp?dl=0
>>
>> Have fun. stay safe, and best DX to all; 73:
>> Andy, KU4XR Friendsville, TN. EM75xr
>>
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