The AMSAT-UK shop has fresh stocks of the popular 5 watt 2.4 GHz amplifier kit for use with the QO-100 geostationary satellite.
The amplifier was designed by Kurt Moraw DJ0ABR and the kit was implemented by Arved Viehweger M0KDS.
The kit includes a single sided PCB on which is already mounted the PA transistor, there is a suitable heat sink on which to mount the PCB with the provided screws. All electronic components are included as are 2 SMA sockets. Assembly of the kits will require some surface mount components to be soldered to the PCB.
Note: It does not include a case for the unit and a separate 24 volt power supply will be required.
The launch of the Es’Hail-2 satellite into a geostationary orbit is currently planned for the 3rd quarter of 2017. The coverage area of the Narrowband (NB) and Wideband (WB) transponders should extend from Brazil to Thailand.
The two “Phase 4” amateur radio non-inverting transponders will operate in the 2400 MHz and 10450 MHz bands. A 250 kHz bandwidth linear transponder is intended for conventional analogue operations and an 8 MHz bandwidth transponder for experimental digital modulation schemes and DVB amateur television.
Narrowband Linear transponder
2400.050 - 2400.300 MHz Uplink Right Hand Circular Polarization
10489.550 - 10489.800 MHz Downlink Vertical Polarization
Wideband digital transponder
2401.500 - 2409.500 MHz Uplink Right Hand Circular Polarization
10491.000 - 10499.000 MHz Downlink Horizontal Polarization
A LEILA-2 system, similar to LEILA flown on AMSAT OSCAR-40 (P3-D) will be used for Traffic Control and Telemetry Beacons. The mayor difference is, that this is a ground-based system which will be installed at the Es’hailSat Satellite Control Center (SCC) near Doha in Qatar.
LEILA-2 will analyze the downlink power levels in the passband of the NB-transponder and automatically generate a Siren to remark users to decrease their uplink power.
LEILA-2 is a joint development of AMSAT-DL’s Achim Vollhardt DH2VA and AMSAT-UK’s Howard Long G6LVB.
LEILA is an German acronym for “LEIstungs Limit Anzeige”, which means: Power Limit Indicator.
The following video gives a first insight to the Es’hail-2 LEILA-2 hardware concept
Qatar Amateur Radio Society Geostationary Transponders Leaflet Page 1
HamRadioNow episode 211 features two presentations given at the TAPR/AMSAT banquet on Friday, May 15 at the 2015 Dayton Hamvention. The first is about the Amateur Radio transponder on the geostationary satellite Es’hail 2 by Thani Ali al-Malki followed by Adventures of a Hacker Turned Ham by Michael Ossmann AD0NR. .
The night begins with a short presentation on what will be the first Amateur Radio transponder on a geostationary satellite, a project of the Qatar Amateur Radio Society, with help from AMSAT DL (Germany). The satellite, Es’HailSAT-2, is owned by the Qatar Satellite Company, and senior engineer Thani Ali al-Malki will give the details. Western Hemisphere hams will be disappointed that the satellite footprint won’t cover anything in North America or Australia, and just a bit of South America. The satellite is primarily a communications system for Qatar and the Middle East, but the ham transponder will also cover Europe, Africa and western Asia (but also missing the China coast and Japan).
Michael Ossmann, AD0NR, founder of Great Scott Gadgets grew up as a computer nerd embracing the hacker ethos. Eventually Michael became very interested in the security of wireless systems such as remote keyless entry, garage door openers, Wi-Fi, and Bluetooth. He designed Ubertooth One, a Bluetooth sniffer that was successfully funded on Kickstarter.
Not one to rest, Michael later designed and successfully funded HackRF One, an open source SDR platform that attracted the attention of the amateur radio community. Michael talks about his unique perspective on the community as an outsider looking in, why he resisted getting an amateur radio license for years, and why he finally decided to join. Michael shares his thoughts on what it means to be a hacker, what it means to be a ham, and what amateur radio may look like in the decades to come.
TAPR President Steve Bible N7HPR‘s introduction establishes the youth theme with an interesting survey of the crowd.
Watch HRN 211: Adventures of a Hacker Turned Ham (Michael Ossmann AD0NR) on HamRadioNow
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