AMSAT Deutschland e.V. Forum

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…

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

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…

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…

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.
…

OSCAR - Status KW 41 im PDF-Format


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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

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

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…

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.

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…