[Lowfer] Re JD's SAQ & NAA

[Laurence KL1 X]

John congrats on all that work! I only ever had one reasonable reception of SAQ in Okie - and all the rest produced red eyes and a lot of yawning the next day.

Here my loop failed a couple of hours prior to start up to plugged up the probe and shoved a 1nF in parallel to knock off the local MWmod and into the sound card.

It was pretty noisy qrn wise as I was already picking up S American and Pacific more local storms but good enough. It was weaker than "normal" here but there has been a heck of a lot of variability 
on the path -

Here a plot of how it looked here - 


http://kl7uk.com/saq24thwide.png

Cheers Laurence KL 1 X Wasilla Palmer Alaska hunting a pumpkin pie...



> From: listread at lwca.org
> To: lowfer at mailman.qth.net
> Date: Mon, 24 Dec 2012 12:40:32 -0600
> Subject: Re: [Lowfer] SAQ & NAA
> 
> Thanks for confirmation of NAA having switched to plain carrier for a while 
> this morning, Doug.  I went out to the field for the first real-world test 
> of my VLF Time Shifter project last night, rather than trying to handle the 
> receiver, the LPF and upconverter, the battery pack for the upconverter, two 
> computers, and their audio cables out in the frost and the wind.
> 
> The first capture, up to 24 kHz only, was during the last 10 minutes of SAQ 
> tuneup, the scheduled message time, and 20 minutes or so afterward.  During 
> that one I monitored plenty of nice, juicy tweeks and related sferics in the 
> audio range, and upon playback in the house this morning, I can see and hear 
> the Big Four MSK signals, the three Russian ALPHAs, two likely spurs, and an 
> intermittent carrier on 18.7 that's well up out of the noise for a dah or a 
> couple of dits at a time.  (Hmm, you could make a catchy Christmas song out 
> of that.)  Even on repeated play, though, I still haven't heard SAQ.
> 
> The second session was in wideband mode.  I haven't studied that capture 
> fully yet, but was afraid I had messed something up when I switched sampling 
> rates, because there was a steady carrier where NAA should have been.
> 
> It was a good quiet night here, for the most part.  There's a chance I might 
> have gotten a little signal if I had driven the Time Shifter a little 
> harder, but the biggest shortcoming of the prototype in its current form is 
> that the only level indication is on the recorder itself, and that's hard to 
> see in the dark.
> 
> John D 
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