Radio Delta AM technology: modulation meter and monitoring equipment in the broadcast chain
Community-driven engineering

Technology

We build, test, and improve what you hear on shortwave — guided by real listener feedback, careful listening, and a deep love for classic radio craft.

Built for real shortwave

Shortwave is never “perfect” — it fades, it drifts, it surprises. That’s exactly why we work in a simple loop: we transmit → listeners report → we measure → we improve.

Follow the journey: from workshop bench to on-air signal.

Our goal is twofold: show our own setup honestly, and make it useful for others. Many checks and on-air tests are documented on video — with practical steps and results you can reproduce.

Our broadcast chain

Some topics already have dedicated post collections. More will follow as we publish.

Studio & control

Where the show is built: microphones, routing, mixing and playout.

  • Consistent gain structure for clean “radio” sound
  • Live control + automation for long music runs
  • Talk segments + listener shout-outs integrated smoothly

Audio processing

Clarity without harshness — especially when conditions get rough.

  • Processing tuned for intelligibility and presence
  • Bandwidth / dynamics choices that work for AM
  • Feedback loop via reception reports
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Transmitter & RF

Stable carrier, clean modulation, and practical monitoring.

  • Focus on reliability during weekend transmissions
  • Clean audio-to-RF handoff
  • Continuous checks: on-air monitoring + community reports
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Antennas & site

Antennas turn the studio into distance.

  • Practical antenna choices for our bands and location
  • Ground/radial work matters (and we treat it that way)
  • Propagation decides: we adapt and keep experimenting
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Monitoring & measurements

We combine technical checks with what really matters: what you hear.

  • Off-air monitoring (local) + remote listener feedback
  • SINPO reports help track changes over time
  • Trends via pins + report history

What’s next

Planned upgrades and deeper posts — driven by community interest.

  • Dedicated articles per topic (with photos + results)
  • Receiver spotlight series (portable → SDR → classic rigs)
  • More “why it sounds like that” explanations

Build along: videos & experiments

Real checks and real on-air results — so others can learn, rebuild, and test along.

Transmitter / RF build & checks

Practical steps, measurements and what to watch for (audio-to-RF, modulation, monitoring).

On-air testing & monitoring

Real on-air runs, practical checks, and what we learn from listener feedback.

Want to help improve the tech? Send a reception report (SINPO + receiver + antenna). Your report becomes a hero pin and helps us measure real propagation.