[Lowfer] WM and SIW this AM~PM

Mon Dec 11 17:38:43 EST 2017

Mike; WOW -- great captures and middle of the afternoon to boot.  Thank 
you very much for taking the time to listen and share your results.

It appears that your receive configuration is working nicely. The low 
background noise in the captures makes the signals really jump out. I 
have my fingers crossed that WM can continue to create good signals to 
measure.

73   de   N8OOU - Mike Meek

On 12/11/2017 03:44 PM, Michael Sapp wrote:
> Mike (OOU): We were thinking alike as I made the additional captures of 
> WM but got side-tracked as I went up to 188.83 to copy EAR for a bit and 
> was actually hearing the EAR QRSS audibly although it was a very weak 
> 500 Hz tone. Was trying to discern the QRSS tone versus the other  low 
> beat note and higher 1~2 kHz range note in the receiver bandpass.
> 
> Anyway here are the two afternoon post change WM captures....slightly 
> higher in frequency as you noted.
> 
> https://www.dropbox.com/s/5f7skn5tp3vj1jo/capt00018.jpg?dl=0
> 
> https://www.dropbox.com/s/qpykcazd143sh29/capt00019.jpg?dl=0
> 
> 
> I'm leaning towards having some receive performance improvement here 
> with the filter-amplifier-filter-mixer configuration.  Especially having 
> heard EAR audibly for the first time.
> EAR has a very stable ground wave signal here, so it makes for a good 
> "standard candle" signal reference...
> 
> WM doing nicely at twice the distance is impressive as well.
> 
> 73, Mike wa3tts
> 
> ----- Original Message ----- From: "N8OOU" <n8oou at meekfarm.us>
> To: <lowfer at mailman.qth.net>
> Sent: Monday, December 11, 2017 4:03 PM
> Subject: Re: [Lowfer] WM and SIW this AM~PM
> 
> 
>> Mike - tts;
>>
>> Are you still able to copy the modified WM id after the 19:00 utc 
>> restart? Raising the frequency did slightly drop the PA Input power 
>> from .99W to .96W.  After going back and checking the antenna tuning 
>> it seemed to be in resonance.
>>
>> Thanks for the reports.
>>
>> 73   de   N8OOU - Mike Meek
>>
>> On 12/11/2017 01:30 PM, Michael Sapp wrote:
>>> Mike: I'm guessing you turned off WM momentarily about 1850 utc as I 
>>> saw it stop about then. Captures from mid morning in QRSS60 normal 
>>> mode below. Made on my NW EWE antenna which is pointed almost 
>>> directly at SIW. I would think the side of the cardio pattern would 
>>> put WM down about 1.5 to 2 dB. SIW stopped at 1809, I assume that was 
>>> the switch to 185.185.
>>>
>>> https://www.dropbox.com/s/dc7csmvwzf8dkj5/capt00014.jpg?dl=0
>>>
>>> https://www.dropbox.com/s/shymmgqahttsts6/capt00015.jpg?dl=0
>>>
>>> https://www.dropbox.com/s/chclkxlzde9rt7i/capt00016.jpg?dl=0
>>>
>>> https://www.dropbox.com/s/n3rt5bkl6sfjjzw/capt00017.jpg?dl=0
>>>
>>> I looked at the GEOS geomag plot and we did have a geomagnetic "jerk" 
>>> from the normal sinusoidal pattern the past 12 hours. I also made a 
>>> rx system change
>>> placing my 9th order Butterworth 300kHz LPF between my 2N5109 W1VD 
>>> design preamp output and the RAY6 Mini Circuits Level 23 Mixer, and a 
>>> 5th order Butterworth LPF with a shunt notch at mid-AM band at the 
>>> preamp input. The 9th order Butterworth LPF has really excellent 
>>> return loss performance, so it may help the match and IMD performance 
>>> of the mixer versus the preamp going directly to the mixer.
>>>
>>> I did a similar thing on 137 kHz overnight and logged 34 WA9CGZ 
>>> decodes on 2200m wspr2, whereas previously I could only log a 
>>> half-dozen or so CGZ decodes overnight. Could be propagation effects 
>>> as well, so it will take a few weeks of observing to sort out if any 
>>> real improvement is being made---or just cooler weather lowering the 
>>> atmospheric noise as the dominant cause of the improved reception...
>>>
>>> Tnx again for the beaconing efforts
>>>
>>> 73, Mike wa3tts
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> ----- Original Message ----- From: "N8OOU" <n8oou at meekfarm.us>
>>> To: "lowferlist" <lowfer at mailman.qth.net>
>>> Sent: Monday, December 11, 2017 2:03 PM
>>> Subject: [Lowfer] WM Lowfer test
>>>
>>>
>>>> All;
>>>>
>>>> I made a small change in the WM Lowfer this afternoon. In support of 
>>>> a special test request I have changes the ID Format to a FSKCW QRSS 
>>>> - 60 mode, as well as increased the transmission frequency by 1 Hz.  
>>>> This is a temporary change to measure the ground wave coverage of 
>>>> the beacon.
>>>>
>>>> I will change the beacon back to it's normal mode and freq after 
>>>> dusk here.
>>>>
>>>> Reports Welcome
>>>>
>>>> -- 
>>>> 73 de N8OOU - Mike Meek
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