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Zelfbouwantenne voor ontvangst op 1090 Mhz met DVB-T stick
12-27-2013, 09:36 PM, (Dit bericht is het laatst bewerkt op 01-06-2014, 11:05 PM om {2} door on4cbn.)
#8
RE: Zelfbouwantenne voor ontvangst op 1090 Mhz met DVB-T stick
Beste Rudy,
Het werkt natuurlijk ook zonder pre-amp.
Dus : antenne rechtstreeks naar de DVB-t stick.

Maar veel betere resultaten heb je met een sat-preamp net onder de antenne. Deze preamp heeft natuurlijk een spanning nodig die via de coax kabel komt (12 volt is voldoende), deze spanning wordt op de coax gebracht door de power-injector. Je hebt dus BEIDEN nodig.
De power-injector heeft 3 aansluitingen met F-connectoren : op de IN sluit je 12 volt DC aan (komende van een AC-DC adaptor).
Op de HF+DC sluit je de lange coax aan die naar je pre-amp + antenne gaat. Op de HF aansluiting staat geen spanning meer, enkel het 1090 Mhz signaal komt hier uit en dit gaat naar je DVB-t stick.


Schematisch ziet het er zo uit :

[Afbeelding: schema_1090.png]

Buiten ziet mijn antenne er zo uit :

[Afbeelding: fr24_ant2.jpg]

De power-inserter (ook 'power-injector' of 'injecteur' of 'bias-tee' genoemd) is zo aangesloten :

[Afbeelding: fr24_DC_inserter.jpg]

Het uiteindelijke resultaat zie je hier :
http://on4cbn.no-ip.org:8205/VirtualRadar/GoogleMap.htm

Nieuwe versie Virtual Radar Server (gebruik Google Chrome)
http://on4cbn.no-ip.org:8205/VirtualRadar/desktop.html

P.S. :
Wel opletten : de 12 volt gaat door de sat-preamp en staat dus ook op je antenne. Op zich kan dat geen kwaad als je antenne uitvoering geen DC kortsluiting geeft (bovenstaande antenne is dus OK !).
Alternatief : de sat-preamp open prutsen en aan de antenne-ingang een spoeltje verwijderen zodat de 12 volt niet meer doorgegeven wordt. In onze Tigem club heeft Marcel - ON5QT hier de meeste ervaring mee.


Veel zelfbouw-1090 Mhz-antenne-info kan je ook vinden op dit forum :
http://forum.flightradar24.com/threads/3...nna/page26


Rudy, ik hoop dat deze info je verder helpt.

73's
Guy


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RE: Zelfbouwantenne voor ontvangst op 1090 Mhz met DVB-T stick - door on4cbn - 12-27-2013, 09:36 PM

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