Off-Grid Academy UK
Volume 9 (Month 09 — September) • RF Intelligence • 30 A4 Pages

Software Defined Radio (SDR) & HF Monitoring: Situational Awareness in an Information Vacuum

Complete UK emergency frequency table and RTL-SDR waterfall guide when TV, web news, and mobile apps vanish.

Primary A4 Action Checklist

  1. Keep a laminated copy of UK National Broadcast, Marine VHF, Airband, and PMR446 frequencies in your radio case
  2. Configure RTL-SDR Blog V4 with HF Direct Sampling / Upconverter enabled for 500 kHz – 30 MHz reception
  3. Construct a simple 10-metre random-wire HF antenna with a 9:1 unun for regional UK/European broadcast reception
  4. Log official emergency bulletins every 6 hours into a physical notebook to combat street-level rumour

Full Field Manual Text & Commissioning Notes

# OFF-GRID ACADEMY FIELD MANUAL 09 ## Software Defined Radio (SDR) & HF Monitoring: Situational Awareness in an Information Vacuum ### 1. Essential UK Blackout Frequency Directory When the internet and cellular networks drop, tune your **Quansheng UV-K5 (`EOD-RF-003`)** or **SpectrumWatch SDR Kit (`EOD-RF-004`)** to these critical UK allocations: | Band / Service | Frequency | Mode | Operational Purpose | | :--- | :--- | :--- | :--- | | **BBC Radio 4 Long Wave** | `198 kHz` | AM | National UK Emergency Broadcast backbone (Droitwich / Westerglen / Burghead transmitters) | | **BBC Radio 4 FM** | `92.4 – 94.6 MHz` | WFM | Primary national civil defence & NESO grid recovery bulletins | | **UK PMR446 Ch 1–16** | `446.00625 – 446.19375 MHz` | NFM | Licence-free short-range neighbourhood & site walkie-talkie traffic (Ch 8 / CTCSS 8 = UK Outdoor/Hill Emergency convention) | | **Marine VHF Channel 16** | `156.800 MHz` | NFM | International Maritime Distress & HM Coastguard coordination (coastal & estuary UK) | | **Civilian Airband Distress** | `121.500 MHz` | AM | Aviation emergency guard (monitors police/air-ambulance/SAR helicopters overhead) | | **Amateur 2m Calling** | `145.500 MHz` | NFM | UK VHF Amateur FM calling channel & RAYNET local emergency nets | | **Amateur 80m / 40m NVIS** | `3.600–3.775 MHz` / `7.060–7.160 MHz` | LSB | Inter-city UK regional HF skywave nets (bridges 50–400 miles) |

Other Printable A4 Field Checklists

Frequently Asked Questions

What does Volume 9 (Software Defined Radio (SDR) & HF Monitoring: Situational Awareness in an Information Vacuum) cover?

Complete UK emergency frequency table and RTL-SDR waterfall guide when TV, web news, and mobile apps vanish. It provides a 30-page A4 printable checklist for Both covering Keep a laminated copy of UK National Broadcast, Marine VHF, Airband, and PMR446 frequencies in your radio case; Configure RTL-SDR Blog V4 with HF Direct Sampling / Upconverter enabled for 500 kHz – 30 MHz reception; Construct a simple 10-metre random-wire HF antenna with a 9:1 unun for regional UK/European broadcast reception.

How can I download or print the A4 PDF for Software Defined Radio (SDR) & HF Monitoring: Situational Awareness in an Information Vacuum?

Download the direct PDF from /field-manuals/sdr-hf-monitoring-situational-awareness-manual.pdf or print this page directly to standard A4 paper with zero email gates.