Dead Link: Lufthansa Amateur Radio Club Frankfurt

Dead Link: Lufthansa Amateur Radio Club Frankfurt
im Lufthansa Sportverein Frankfurt e.V. (LSV) Sparte Amateurfunk.

Die Mitglieder der Sparte sind Funkamateuren aus verschiedenen Bereichen des Lufthansa Konzerns und OM des DARC OV F44 Rhein-Main.


ist unsere Clubstation in der Nähe des Flughafens Frankfurt Rhein-Main. Die Ausrüstung erlaubt Funkbetrieb auf Kurzwelle sowie auf VHF/UHF in SSB, CW und digitalen Modes.


In practice, the majority of university satellites are in Low Earth Orbit and use those sections of the VHF, UHF and S bands which are allocated to the amateur satellite service. GENSO is intended to serve the requirements of such satellites, although the network actually operates irrespective of frequencies and modulation schemes. It is the capabilities of the ground stations that join GENSO, which defines the capabilities of the network.

The most common frequencies are:

144 – 146 MHz VHF band up- and downlink (i.e. 2 m)

435 – 438MHz UHF band up- and downlink (i.e. 70 cm)

2.4 GHz S-band downlink

1.2 MHz L-band uplink

Typically, university satellites might use baseband AX.25 protocol on 1200 AFSK with FM or SSB modulation or 9600 FSK.

Note: the doppler shift calculations in the software (required for tracking) do take into account the presence of up- and down-converters, which may be used to change the nominal frequency range of the transceiver.

WSPRnet | Weak Signal Propagation Reporter Network

WSPRnet | Weak Signal Propagation Reporter Network
Weak Signal Propagation Reporter Network

The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT’s MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions. The software is open source, and the data collected are available to the public through this site.

Dead Link: All About Pactor and Pactor Modems – by Tim Hasson, W3IJP

Dead Link: All About Pactor and Pactor Modems – by Tim Hasson, W3IJP
Pactor, the protocol, traces it’s roots to the late 1980’s and efforts by a couple of German amateur radio operators to improve digital radio communications. Using the word “amateur” in connection with these guys is quite a piece of understatement. The present-day team includes a combination-degreed Physicist/Chemist who specializes in communications signal theory; an electronics engineer and programmer; and a military electronics designer whose particular specialty is something called “EMC”, or Electro-Magnetic-Compatibility. If that’s not enough, their business manager is a physician who used to specialize in nuclear medicine. Talk about your bunch of rocket scientists!

When these talented radio experimenters introduced the first version of Pactor (Pactor-I from here on, to avoid confusion later) to the rest of the world around 1990, it caused quite a sensation.

HF Propagation and Solar-Terrestrial Data Website

HF Propagation and Solar-Terrestrial Data Website
Solar banners are available in 13 different configurations, two w/VHF Conditions, four w/current solar images that are selectable, two World Sunlight (one flat map, one globe), and one with the last 30 days of solar flux and sunspot numbers ploted on a line graph.Data for VHF Conditions is from DXrobot – Gouda and Make More Miles on VHF (used with permission).

Simply cut and Paste the following html into your web page at the location you want the current Solar-Terrestrial Data to appear (make sure it is in ENGLISH before copying). A word of caution, if you resize the banners, they will look terrible.

Four banners are available in four background colors and corresponding text colors, and also support transparent backgrounds. The six with VHF and solar images, two current world sunlit, and solar flux/sunspot graph items do not support background or transparent. Four image banners have selectable sun images. All banners have selectable 304A source data.