Manual
Ran captures of the EU TA window last night but did not see your signal.
Cosidering DCF39 was very
weak into the W3EEE grabber I'm not surprised at the results.
Will keep a screen open for you when you are active.
Jay W1VD
----- Original Message -----
From: "Manuel Santos" <[email protected]>
To: <[email protected]>
Sent: Wednesday, December 20, 2006 7:15 AM
Subject: LF: EA4BVZ
> Hallo friend Stephan:
>
> To be so near of the DCF is a very strong handicap. I have received a very
> good report of Paris and my signs was received also in the Grabber of DF6NM.
>
> For the next year I will put more power and your another banspass filter.
>
> Happy Christmas and Good 2007
> EA4BVZ
> -----Mensaje original-----
> De: [email protected]
> [mailto:[email protected]]En nombre de Stephan Hans
> Enviado el: mi�rcoles, 20 de diciembre de 2006 13:27
> Para: [email protected]
> Asunto: LF: Re: RE: Re: EA4BVZ MC
>
>
> Hello Manuel,
>
> sorry, nothing here at locator JO40KA last night. I grabbed the whole
> night the range from 136317 to 136325 Hz with DL4YHF's Spectrum Lab, but I
> got only noise. Not even traces from your signal :-(.
>
> Last week (10.12.06), I received PE1RRF at the same frequency with a
> nearly perfect signal. You may have read my answer here at the group.
>
> Anyway, I've to admit that my actual rx isn't very sensitive. I've an
> passive low pass (edge frequency approx. 140khz) with 20dB amp in the next
> stage. This signal is then going to be mixed through a symmetric
> transformator with an CD4016 and TCXO controlled 135khz down into the
> baseband. Similar to the design of Jean-Pierre's rx, but without bandpass
> filter. So I receive the mirror frequencies (like 133679 in your case) as
> good as the desired frequencies... which is not a big problem (there's not
> much here from 132 to 134kHz) but at least a waste of 3dB sensitivity.
>
> But the real problem with this approach is, that I'm located approx. 4
> wavelengths from Mainflingen / DCF49, so if I increase the amplification,
> the output of the mixer is going to be clipped due to the 128.830 kHz of
> DCF49 (which produces nasty distortions all over the band).
> I experimented with several bandpass filters to suppress the undesired DCF
> signals, but all my filter approaches produced additional noise that wastes
> the gain of selectivity. I even tried an nf-peak filter between the output
> stage (low pass with small amplification) and my PC's soundcard, but I only
> got more noise instead of sensitivity.
>
> So I'm now designing a new rx, around a very good 1.4MHz ssb-crystal
> filter (from a commercial marine rx), which will use two (TCXO controlled)
> DDS synthesizers. Then I'm going to get rid of DCF49 and even DCF39 (which
> still has a very strong signal here).
>
> vy 73 to you and the group de DL3FCH
>
> ----- Original Message -----
> From: Manuel Santos
> To: [email protected]
> Sent: Tuesday, December 19, 2006 10:16 AM
> Subject: LF: RE: Re: EA4BVZ MC
>
>
>
>
>
> At wich speed/mode are you going to transmit, QRSS3/10/30/60 ?
>
> At QRSS 60.
>
> Many Thans Stephan
>
> EA4BVZ
>
>
> I will have a look at 136321 Hz tonight.
>
> Greetings from DL3FCH, Stephan
>
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