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RE: LF: mw activity

To: [email protected]
Subject: RE: LF: mw activity
From: "C. Groeger" <[email protected]>
Date: Sat, 28 Dec 2013 16:51:43 +0100
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Sorry Clemens,
I don't understand how you matched the dipole via 1,5 nF.
Can you explain that to me?

Christian Groeger

Clemens Paul <[email protected]> schrieb:

> >Will you use the dipole for xmitting?
>For sure,look at the matched feeding point impedance.
>Matching is done with one single 1,5nF cap.
>>-----Original Message-----
>>From: [email protected] 
>>[mailto:[email protected]] On Behalf Of C. Groeger
>>Sent: Saturday, December 28, 2013 11:19 AM
>>To: [email protected]
>>Subject: Re: LF: mw activity
>>Thanks for nice report!
>>I'm very curious about your signal!
>>Will you use the dipole for xmitting?
>>Will be a big signal with that Ant!
>>73, df5qg
>>Christian Groeger
>>Clemens Paul <[email protected]> schrieb:
>>> DK7FC and DF5QG in CW both with 599 here until 00.05.
>>>(DK7FC sometimes with 59~)  :-)
>>>QSB max. 6dB.
>>>>-----Original Message-----
>>>>From: [email protected] 
>>>>[mailto:[email protected]] On Behalf Of wolf_dl4yhf
>>>>Sent: Friday, December 27, 2013 12:17 PM
>>>>To: [email protected]
>>>>Subject: Re: LF: Sending Opera with SpecLab
>>>>Greetings all,
>>>>(and apologies to Markus for juming in so quickly..)
>>>>The principle described by Markus is only for transmission. 
>>>>To take place of the DS option, i.e. for RECEPTION, spectrum 
>>>>lab would have to modified to some extend, last not least it 
>>>>would need an 'automated' method to build the correlation 
>>>>patterns for the DS mode itself. 
>>>>Since Markus has already provided his opera generator (thanks 
>>>>for that!), it could be modified into a command-line driven 
>>>>tool (exe or dll) which SL could invoke to create the 239-bit 
>>>>message pattern for the correlators. I cannot promise too much 
>>>>yet (being busy from too many other projects) but maybe  when 
>>>>the new 'super-linear', moderate-power, switching mode 
>>>>amplifier is finished I'll have a look at it again.
>>>>All the best,
>>>>  Wolf  DL4YHF .
>>>>Am 27.12.2013 02:00, schrieb Bob Raide:
>>>>    Markus;
>>>>     Can this take the place of DS option used with OPERA? 
>>>>    From: [email protected]
>>>>    To: [email protected]; 
>>>>[email protected]
>>>>    Date: Fri, 27 Dec 2013 01:45:14 +0100
>>>>    Subject: LF: Sending Opera with SpecLab
>>>>    Today I finally found a simple solution to send Opera 
>>>>sequences from SpecLab's digimode terminal. The nice thing 
>>>>about this is that you can use all of SpecLab's powerful 
>>>>functions, like samplerate correction, adjustable pulse 
>>>>shaping, or high audio frequencies. This seems very useful, 
>>>>especially in the context of possible future VLF Opera transmissions.
>>>>    First you will need to create a text file consisting of 
>>>>the 239 bit 1101... sequence for your callsign. This can be 
>>>>generated from the PIC menu in the original Opera software. Or 
>>>>you can use my little code generator tool at 
>>>> - simply 
>>>>copy opgen.exe from the zip and type
>>>>     opgen mycallsign >opera.txt
>>>>    into a command window.
>>>>    In SpecLab, open the digimode terminal and configure it 
>>>>for ASK with no encoding, as shown in the attached "_settings" 
>>>>screenshot. The symbol rate has to be set to the inverse 
>>>>dotlength for the desired Opera speed:
>>>>    mode   dotlength    rate
>>>>              (seconds) (sym/s)
>>>>    Op-8    1.024s     0.9766 
>>>>    Op-32   8.192s    0.12207
>>>>    Op-4H  65.536s   0.01526
>>>>    Shaping time can be selected from hard (0%) to soft 
>>>>(50%) keying. Then enter your desired audio frequency and use 
>>>>"Load TX text" from the file menue to load your opera.txt 
>>>>file. The sequence will appear in the TX window, and the 
>>>>transmission can started by hitting the RX / TX button.
>>>>    Best 73,
>>>>    Markus (DF6NM)
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