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  • David G0MRF

    Hat eine Antwort im Thema 23cm transverter for 1267-1269 verfasst.
    Beitrag
    Hi Thomas.
    For power budget reasons, it's important to either shut off the transmitter on ESEO when there is no one on the uplink, or change from transponder to telemetry, which uses less power. As L band is full of radar signals, we could not use…
  • HB9SKA

    Hat eine Antwort im Thema 23cm transverter for 1267-1269 verfasst.
    Beitrag
    Hi David
    Another question. Why needs the ESEO repeater an 67 Hz subtone (CTCSS) on the uplink ? There are no taxi drivers nor other QRM sources on 23cm. I have an old IC-1271E I would like to use again.


    73 de Thomas
  • Remco

    Hat das Thema Es'hail-2 transverter PA3FYM-approach gestartet.
    Thema
    The attached photo also was posted on Twitter, but I thought it would be a nice one as first posting in this part of this forum!

    The transverter depicted below is designed as a real 'BUC' (block up converter) to be positioned near a (multiband) feed.

    It…
  • David G0MRF

    Hat eine Antwort im Thema 23cm transverter for 1267-1269 verfasst.
    Beitrag
    Hi Ross
    It sounds like you have an interest in telemetry, but you also say working the satellites on 23cm. The picture to the left is ESEO (European Student Earth Orbiter). It will have an uplink on 1263.5MHz, so when you select the IF frequency on…
  • DK2ZF

    Hat eine Antwort im Thema OSCAR - Status KW 41 verfasst.
    Beitrag
    Erstmals die AMSAT Status Page besucht. Höchst interessant.
    Leider ist doch die Aktivität gegenüber den 90ern unvergleichlich gering.
    Hoffentlich wird es beim neuen geostationären Satelliten besser. Man braucht zumindest fast alles an Ausrüstung neu.
  • HB9SKA

    Hat das Thema OSCAR - Status KW 41 gestartet.
    Thema
    OSCAR - Status KW 41 im PDF-Format


    Rückkopplung / Feedback

    Tnx 4 msg :(

    Infos und Empfangsberichte sind immer gerne willkommen, auch in diesem Forum!
    Information and reception reports are always welcome, also in this forum!

    73 von Thomas - hb9ska@uska.ch

  • DH2VA

    Beitrag
    Hi David,
    good remark, thank you! I fell into the Fox trap (!) just recently.. I understand that Connor Winfield advertise their analogue TXCO circuitry. I have failed to find a cheaper alternative (well, I guess you get what you pay for)..

    73s Achim
  • David G0MRF

    Beitrag
    Hi all.
    FYI. I measured the warm up drift of a standard Octagon LNB and in 30 minutes it drifted 34kHz. - OK, after 20 mins it was probably 'usable'.
    After removing the 27MHz crystal and replacing it with a Conner Winfield TCXO the drift was down to…
  • DH2VA

    Beitrag
    Small addendum: my proposed design only works for a 'normal' downconverter with LO of 9750 MHz. Peter's mentioned unit from DB6NT sounds more like a LO frequency of 9360 MHz which requires an SDR.
  • DB2OS

    Beitrag
    Please note that the "all-in-one" solution MKU LNC 10 OSCAR P4-A from DB6NT had a fundamental design change.
    According to the manufacturer, a version with IF at 432 MHz was originally planned, but due to component availability, especially the…

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