Competitive station · signal intelligence · living archive
OA4EFZ.From Peru to the world.
Learn. Operate. Connect.
A competitive and experimental station built to serve the radio community.
Recommended band--
Next satelliteCalculating pass
Solar flux--
Kp index--
Data
Connecting
DMR ID
7160084
OA4EFZ DIGITAL
OA4EFZPARTNERS / SPONSORS
PARTNERSHIP AREARADIO TECHNOLOGYPARTNERSHIP AREAFIELD OPERATIONSPARTNERSHIP AREASATELLITE & SPACEPARTNERSHIP AREAOUTDOOR EQUIPMENTPARTNERSHIP AREAIMAGE & AUDIOPARTNERSHIP AREARADIO TECHNOLOGYPARTNERSHIP AREAFIELD OPERATIONSPARTNERSHIP AREASATELLITE & SPACEPARTNERSHIP AREAOUTDOOR EQUIPMENTPARTNERSHIP AREAIMAGE & AUDIO
OA4EFZ JOURNAL
News from the shack.
Operations, tests, satellites, tools, photography, QSL and progress across the OA4EFZ ecosystem.
No news has been published yet.
OA4EFZ MEDIA CONTROLMASTER CONTROL / LIVE RELAY
RadioMap Intelligence
The global spectrum in motion
A color operational map with live signal and orbital layers.
EARTH FROM SPACEGeoColor / South America2026-11-02 13:24:10 UTC
CLIMATE & SIGNAL WATCH
Open climate center →A moving Earth, with data you can use.
OA4EFZ KNOWLEDGE
What would you like to learn today?
Look up a concept or start a guided path to understand radio step by step.
Recommended path
Electricidad básica para radioafición
4 concepts · 20 min
Start learning →
More than 1,268 connected concepts across 19 knowledge areas.
Performance Lab
Train. Measure. Operate. Compete.
A tool ecosystem designed to improve operator capability, speed and precision.
LIVE01 / PERFORMANCERadioDeck
Operational intelligence to choose a band, understand conditions and prepare the station.
- Live bands
- Propagation
- Real-time panel
LIVE02 / PERFORMANCECW Lab
Train Morse rhythm, accuracy and reception through progressive sessions and metrics.
- Guided practice
- Adaptive speed
- Measurable progress
LIVE03 / PERFORMANCESatellite Pass Coach
Prepare AOS, LOS, Doppler, frequencies and every stage of a satellite pass.
- Local prediction
- Uplink and downlink
- Operating checklist
LIVE04 / PERFORMANCESSTV Studio
Create, transmit and decode radio images through simple, repeatable workflows.
- Visual encoding
- SSTV reception
- Image templates
LIVE05 / PERFORMANCESignal Lab
Analyze filters, spectrum, noise and your station’s RF behavior.
- Measurement
- Comparison
- RF diagnostics
LIVE06 / PERFORMANCEQSL Creator
Generate numbered, signed and recoverable digital cards with a verifiable URL.
- Editable designs
- Digital signature
- Email delivery
INSTAGRAM LIVE FEED@oa4efz
QSL / LIVING ARCHIVE
QSL: contacts and memory.
Explore the historical collection, verify an OA4EFZ QSL, request a card or discover limited photographic editions.
OA4EFZ SIGNAL
Get notified when we go on air.
Subscribe for station openings, transmissions and relevant operating updates. No noise: only useful notices.