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Re: LF: 137.7770 kHz

To: [email protected]
Subject: Re: LF: 137.7770 kHz
From: Stefan Schäfer <[email protected]>
Date: Wed, 05 Jun 2013 23:34:34 +0200
In-reply-to: <22F50727DAB943178CABF2FE9A731025@GaryAsus>
References: <[email protected]> <[email protected]> <9F4D930ED1F64F7C974C9F3570FE5DEA@White> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <22F50727DAB943178CABF2FE9A731025@GaryAsus>
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Hello Joe,

Gary's excellent capture of your signal prompted me to check my over-night grabber saves & found your signal showing up for a long period of time from 00:50utc to about 03.00utc.

The best capture is that one: https://dl.dropboxusercontent.com/u/19882028/LF/TA60_05.JUN_02.48UTC.jpg

73, Stefan/DK7FC

PS: sri Gary, I've stolen your text ;-)

Am 05.06.2013 19:51, schrieb Gary - G4WGT:
Hi Joe,

Michel's excellent capture of your signal prompted me to check my over-night grabber saves & found your signal showing up for a long period of time from 00:50utc to about 03.30utc on my QRS03 grabber, see attached at 01:40utc. A letter "V" seen at the top of image.

73,

Gary - G4WGT.


----- Original Message ----- From: <[email protected]>
To: <[email protected]>
Sent: Wednesday, June 05, 2013 1:02 PM
Subject: Re: LF: 137.7770 kHz


Thank-you, Michel.

Good conditions and no mention of a chip, nor could I see one
on your spectrum.  Yesterday I changed the TX and hopefully
fixed the chirp and maybe the phase glitches?

There are still bumps (~0.1 Hz) in the spectrum 10 MHz DOCXO output
every few minutes.  They last longer when the osc is less thermally
insulated from the shack, but this is unchanged by putting
a big cap across Vcc (which is unchanging). Could this be the source of the phase instability in the 137 kHz sigs? How about a large AC ripple on the supply to the PA?

73 & tnx
Joe




On Wed, 5 Jun 2013, Michel Brunel wrote:



Good conditions tonight,

73,  Michel - f5wk

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