Date: Wed, 5 Jun 2013 21:04:10 -0230 (NDT)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: 137.7770 kHz
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Hi Stefan, Markus and Jean Pierre F1AFJ (Grabber service),

Thanks for the report, Stefan.  I am happy you have something nice to
say about my sigs. Its good that they are reaching you when we are so
close to the solstice.

They were also quite strong around that time on Jean Pierre's grabber as
well.

As for Markus, he provided what I asked for  -- and now I must say his
very critical report is most gratefully received. :-)  The problem seems to
have disappeared after the 10 MHz input to the AD9851 was boosted with
a BJT amp.  The original interface simply offset the 1.5 V p/p
to 2.5V DC; the new one bosted it to 0-3V which is more in line with
the specs for the DDS.  Perhaps the chirps and phase glitches were
due to RF interfering with the weak 10 MHz input.

I will be happy to try OP32 on another frequency soon.

Thank-you very much for the good news and thanks all around.
The TX is now again QRV on QRSS30. (2330 UTC)

73
Joe


On Wed, 5 Jun 2013, Markus Vester wrote:

> Joe,
>
> ok, then here comes a particularly un-welcomed report ;-)
>
> The problem seems to be solved, and this morning your trace appeared perfectly focused in the narrow spectrogram. The frequency is 137777.0028, give or take a couple of 100 uHz. How did you fix it?
>
> Would you like to try Op-32 again one of these days, preferably between 137.5 and 137.6 kHz?
>
> Best 73,
> Markus (DF6NM)
>
>
> From: jcraig@mun.ca
> Sent: Wednesday, June 05, 2013 8:36 PM
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: LF: 137.7770 kHz
>
>
> Hi Gary,
>
> Thank-you for the report, caputure and for running your FB grabber.
> I look for sigs on your grabber quite frequently to check the TX.
>
> The TX will be on again tonight, (without chirps I hope).  Comments
> about the phase (especially unfavourable criticism) are solicited and
> shall be most welcomed.
>
> 450 watts, 3.2 amps to a 100m wire at 15m. QRSS30.
>
> 73
> Joe VO1NA
> ...

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