Schedule released for E2STAYHOME satellite operation

Es'hail-2 Qatar-OSCAR-100Thailand’s regulator, the National Broadcasting and Telecommunications Commission (NBTC), has issued the special callsign, E2STAYHOME, to the Radio Amateur Society of Thailand under the Royal Patronage of His Majesty the King (RAST) for use during the outbreak of the COVID-19 virus.

This is because it is very important for people to boost their immune systems to fight off germs that can enter their bodies and to reduce the chance of getting infected by the COVID-19 virus. Now, it is very important to stay home and to keep a distance of at least one metre from others, if this is possible, which is one way to help prevent the spread of the disease on a global basis.

This is a rare opportunity for ham radio operators who are interested in satellite communications to legally communicate with Thai amateur radio stations by means of the Es’hail-2 or QO-100 geostationary satellite which licensed by the Thai regulator, the NBTC, in response to requests from RAST, and using the special callsign E2STAYHOME on the evenings of each working day in Thailand and on every weekend.

The operating schedule is as follows:
Monday to Friday, 1100 – 1500 UTC
Saturday and Sunday, 0800 – 1500 UTC
all days after 1600 UTC and up to 2200 UTC Thailand has an emergency curfew in place. Please STAY HOME!!

During these times, Thai hams will be operating using this callsign on all bands and in all modes, including all satellite modes under the supervision of the Radio Amateur Society of Thailand (RAST) in an effort to help prevent the spread of COVID-19 and they will be QRV from today until July 15, 2020. QSOs with E2STAYHOME can be confirmed via Tim W. Tadsri, HS6MYW and QSL cards will be sent to all via the bureau.

73 de HS1JAN
Tanan Rangseeprom

AMSAT Bulletin Board


5 watt 2.4 GHz Amplifier Kit for QO-100 is Back in Stock

5 watt 2400 MHz Amplifier Kit

5 watt 2400 MHz Amplifier Kit

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. Update May 23: Unfortunately it is now Sold-Out.

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.

Kit details at

Assembled PCB

QO-100 information

Filtered 2400 MHz Driver Amplifier Kits Now Available

2400 MHz Filtered Driver Amplifier Kits

2400 MHz Filtered Driver Amplifier Kits

This kit has been designed by David Bowman G0MRF and contains all the parts required to drive a PA on 2.4 GHz for QO-100. The completed board will have a gain of about 25 – 26 dB and for best linearity, should be kept to 200 mW output.

2400 MHz Filtered Driver Amplifier Kit

2400 MHz Filtered Driver Amplifier Kit

This kit can be assembled in a couple of hours by constructors with a medium level of experience. In addition to the kit you will need a 2.5mm drill for the mounting holes in the heatsink. You will also need a pair of SMD tweezers, a soldering iron with a fine tip and some small diameter solder e.g. 0.4 or 0.5mm. Finally, a headband magnifier or similar will help considerably with the SMD parts.

David suggests running the board from 12 or 12.6 volts. At 13.8 volts the supply current and power dissipation increase without any significant improvement in performance

The kit is available from the AMSAT-UK shop

The Assembly Guide PDF is available at

Spring Issue of OSCAR News Available

Oscar News issue 229 March 2020 Front CoverE-members of AMSAT-UK can now download the March 2020 edition of OSCAR News, issue 229, here.

The paper edition edition is being sent to postal members and should arrive in the coming week.

In this issue:
• From the Secretary’s Keyboard
• QO-100 Wideband Transponder – 2020 Operating Guidelines and Bandplan
• AMSAT QO-100 NB Transponder Bandplan Update
• 5-watt 2.4 GHz amplifier kit for QO-100
• My experience with the AMSAT-UK 5W QO-100 Amplifier
• Review of the DJ0ABR 5W 2.4GHz Amplifier
• Under Development!
• AMSAT Files Comments Opposing Deletion of 3.4 GHz Band
• The eSatellite Award by eQSL
• Ad Astra!
• One Year of Operation for the Goonhilly WebSDRs for QO-100
• HuskySat-1
• How Phoenix went from a Paper Proposal to ASU’s First Student-Led CubeSat in Space
• The Qarman Cubesat
• The latest FUNcube Groundstation – in Antarctica
• From the Archives – An AMSAT-NA Symposium early this century

AMSAT-UK FUNcube Mission Patch

AMSAT-UK FUNcube Mission Patch

Membership of AMSAT-UK is open to anyone who has an interest in amateur radio satellites or space activities, including the International Space Station (ISS).

E-members of AMSAT-UK are able to download the quarterly publication OSCAR News as a convenient PDF that can be read on laptops, tablets or smartphones anytime, anyplace, anywhere. Join as an E-member at Electronic (PDF) E-membership

PDF sample copy of “Oscar News” here.

Join AMSAT-UK using PayPal, Debit or Credit card at

E-members can download their copies of OSCAR News here.

Radio ZS ham radio magazine free download

Radio ZS April 2020 Front CoverThe South African Amateur Radio League (SARL) is the latest national society to make their magazine freely available to all in the convenient PDF format.

The magazine features a QO-100 Dual Patch antenna article by David ZR6DLG and the ARISS Interoperable Radio System.

The SARL say:

The Council has decided that the April 2020 issue of Radio ZS is available for members and not yet members of the SARL. Click on the link on the front page of the League website to download a copy. Read on page 10 and 17 about My Project and how to win a membership to the SARL. On page 11 you can read about SARAH or Southern African Radio Active Ham.

You can download the PDF of the April edition of Radio ZS, published by the South African Radio League from

The SARL website headlines the key presentation on The Future and Growth of Amateur Radio given by RSGB Director Kamal Singh M0IOV, see

AMSAT-BR QO-100 FT8 QRPp Experiment

AMSAT-BR Logo and Dish AntennaAMSAT-Brazil is organizing a reverse beacon FT8 QRPp experiment/contest via the QO-100 geostationary amateur radio transponder.

The first 10 spotted stations with lower SNR will receive a Certificate of Accomplishment.The dead line will be May 1st 2020. To qualify, the SNR must be lower than -18 dB (as measured by the ft8 decoder). The receiver will be active on Saturdays and Sundays from 12:00 UTC to 24:00 UTC and will be tuned to 10.489540 GHz with a 3.5 kHz bandwidth. All stations calling CQ will be logged.

The objective for the project is to incentive low power experimentation through the QO-100 narrow band transponder. Stations participating in the experiment are welcome to send a brief description of their setup, including information about RF power output, hardware and software setups, antenna type and gain, photos, etc. to the email address
py2sdr at gmail dot com.

73, Edson PY2SDR

You can listen to the QO-100 transponder downlink online at

QO-100 information