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Re: VLF: SAQ Test

from [Markus Vester] [Permanent Link][Original]
To: [email protected]
Subject: Re: VLF: SAQ Test
From: Markus Vester <[email protected]>
Date: Sat, 29 Sep 2018 03:34:30 -0400
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In-reply-to: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Good point.

During tuneup, the speed of the alternator is manually adjusted using motor resistors and a frequency counter, but it is never perfectly constant. I have temporarily shifted the zoom on my grabber from NML to SAQ's frequency (see attached screenshot, with colours swapped from blue to green for better visibility). Between several sudden frequency excursions we can see a general upward trend, perfectly matching that in Edgar's spectrogram.

Jan Steinbach from SAQ has sent an email confirming the Sep 28 test transmission.

Best regards,
Markus (DF6NM)

.

-----Ursprüngliche Mitteilung-----
Von: hvanesce <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Sa, 29. Sept 2018 5:06
Betreff: RE: VLF: SAQ Test

It looks like the SAQ received signal frequency ramps upward ~ 25 Hz (over the 16:25 – 16:45 UT period) at Edgar’s QTH.

On Peter’s spectrogram I can’t see a frequency change but the resolution of the spectrogram appears to be 100 Hz.

Was the transmitter frequency probably ramping during the test?

 

73,

 

Jim AA5BW  

 

 

From: owner-[email protected] [mailto:[email protected]] On Behalf Of [email protected]
Sent: Friday, September 28, 2018 6:42 PM
To: [email protected]; [email protected]; [email protected]
Subject: AW: VLF: SAQ Test

 

Yes Edgar thats it, a dash at the right time and frequency.

73, Markus 


------ Originalnachricht------

Von: Edgar

Datum: Sa., 29. Sep. 2018 00:35

An: [email protected];[email protected];

Betreff:Re: VLF: SAQ Test

May be?



Regards, Edgar
Moonah, Tasmania.

 

Attachment: saqtest_df6nm_180928.jpg
Description: JPEG image

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