Es’hail‑2 / QO‑100 – The Geostationary Playground for Radio Hams
The first geostationary amateur radio satellite – a permanent DX window in the sky.
Why radio hams are excited about QO‑100
Es’hail‑2, carrying the QO‑100 amateur payload, is a game‑changer. For the first time, radio amateurs have access to a permanent, geostationary transponder: no passes, no chasing footprints – just a stable, always‑on DX hotspot covering a huge part of the globe.
From casual SSB ragchews to cutting‑edge DATV experiments, QO‑100 turns a small dish and modest power into intercontinental QSOs on demand. If you’ve ever wished HF propagation could be “locked in” all day, every day – this is the closest thing we have.
At a glance
- Orbit: Geostationary at 26°E
- Footprint: Europe, Africa, Middle East, parts of Asia & South America
- Transponders: Narrowband (SSB/CW/data) & Wideband (DATV)
- Access: Small dish, LNB, 2.4 GHz uplink, 10 GHz downlink
- Use cases: DX, emergency comms, experimentation, education
The amateur payload – what’s on board?
Narrowband transponder (NB)
- Bandwidth: 500 kHz
- Uplink: 2400.0–2400.5 MHz (S‑band)
- Downlink: 10489.5–10490.0 MHz (10 GHz)
- Modes: SSB, CW, digital narrowband (e.g. FT8, PSK, etc.)
- Use: Everyday QSOs, DX, beacons, experiments
Wideband transponder (WB / DATV)
- Bandwidth: 8 MHz
- Uplink: 2401.5–2409.5 MHz
- Downlink: 10491–10499 MHz
- Modes: Digital Amateur TV (DATV)
- Use: Live video, demonstrations, technical showcases
Because QO‑100 is geostationary, there is no Doppler shift to worry about. Once your station is aligned and stable, operation feels more like a high‑quality repeater than a fleeting satellite pass.
What you need to get on QO-100
Receive side (downlink – 10 GHz)
- Dish: Typically 60–90 cm offset dish (larger improves margin)
- LNB: Standard Ku‑band satellite TV LNB, often modified or GPS‑locked for stability
- IF radio: SDR receiver or conventional rig tuned to the LNB IF (e.g. 739 MHz)
- Software: SDR software or your usual rig + panadapter
Transmit side (uplink – 2.4 GHz)
- Exciter: Transverter or SDR feeding 2.4 GHz
- Power amp: Around 5–10 W at the feed is usually enough
- Antenna: Patch feed, helix, or dual‑band feed at the dish focus
- Control: Full‑duplex operation strongly recommended to monitor your own signal
Many hams build their QO-100 station step‑by‑step: start with receive only, get comfortable with the downlink and beacon, then add the uplink hardware. It’s a fantastic project if you enjoy RF, microwaves, SDR, and practical engineering.
Operating style and good practice
- Stay within the band plan: Dedicated segments for beacons, CW, SSB, and digital modes.
- Use only the power you need: The transponder is linear – strong signals can cause issues for everyone.
- Monitor your own signal: Full‑duplex lets you hear what you sound like on the bird.
- Keep it clean: Good filtering, clean audio, and careful drive keep the transponder pleasant to use.
- Be welcoming: QO‑100 has a very international user base – it’s a great place to meet new stations.
Why QO‑100 is worth building a station for
Always-on DX
No more waiting for the bands to open. If you’re in the footprint, you can work stations across continents almost any time of day. It’s ideal for skeds, nets, and demonstrations.
Technical playground
QO‑100 encourages experimentation: SDRs, frequency‑locked LNBs, custom feeds, DATV encoders, remote stations, and more. It’s a rich platform for those who like to tinker and improve.
Education & outreach
Because the satellite is always there, it’s perfect for club demos, school events, and STEM projects. You can reliably show students and visitors live satellite QSOs and even live amateur TV.
Resilience & emergency comms
A geostationary amateur transponder offers interesting possibilities for emergency and backup communications within its footprint, especially when combined with portable or remote‑controlled stations.
First steps if you’re curious
- Listen first: Use an SDR and a small dish + LNB to receive the QO‑100 beacons and traffic.
- Study the band plan: Learn where SSB, CW, and digital modes live on the transponder.
- Plan your station: Decide on dish size, feed type, and whether you’ll use SDR or a classic rig.
- Build in stages: RX‑only → low‑power uplink → refined, full‑duplex station.
- Join the community: Look for QO‑100 user groups, forums, and activity maps to find local experience.
Ready to point a dish at your new favourite “band”?
Es’hail-2 / QO-100 turns a corner of the microwave spectrum into a shared, permanent meeting place for radio hams. If you enjoy building, experimenting, and real DX – this is absolutely something to get excited about.