EMCOMM Go Bag

KISS Modems for EMCOMM

A KISS modem (Keep It Simple, Stupid) is a streamlined interface for packet radio communication. In emergencies, it’s one of the most effective tools for ham radio emergency communications, especially with APRS (Automatic Packet Reporting System). With a KISS modem or APRS/KISS-enabled radio, you can exchange position data, telemetry, and short text messages on HF, 2 m, and 70 cm — even if internet and cellular networks are down.

If you’re building a ham radio go‑bag for disaster preparedness, a KISS modem or TNC‑equipped radio is essential. This guide explains band‑by‑band use, top EMCOMM apps, real‑world scenarios, and how to equip your station.

Why KISS Modems Matter for EMCOMM

  • Winlink emergency email: relay traffic on HF or VHF/UHF when the internet is unavailable.
  • APRS tracking: real‑time location and short messages for field teams.
  • Tactical packet messaging: fast local links on 70 cm.
  • Digipeating & BBS: keep regional nets operating when infrastructure fails.

Context: Floods, storms, and power cuts across Europe can disrupt mobile networks. A KISS TNC adds resilience to your radio toolkit.

Band‑by‑Band Usability

HF (80 m, 40 m, 20 m)

  • 300 baud Robust Packet Radio (RPR) for long‑distance reliability through QSB and noise.
  • Ideal for Winlink email over HF and long‑range HF APRS.
  • Integrates via USB‑C, Bluetooth, CAT for clean portable setups.
  • Pro tip: On iOS, if an app won’t switch KISS modes, send !@K INIT with PuTTY.

2 m (144–146 MHz)

  • On 144.800 MHz, run 1200 baud APRS and packet for mobile tracking and messaging.
  • Bluetooth TNC pairs with APRSdroid (Android) or APRS.fi / RadioMail (iOS).
  • APRS handhelds with GPS + KISS TNC excel in portable EMCOMM.

70 cm (430–440 MHz)

  • 9600 baud packet for high‑speed local EMCOMM traffic and file transfer.
  • Great for regional coordination and UHF message nets.
  • Works with VarAC, JS8Call, and other digital chat modes.

Top EMCOMM Applications

  • APRS Tracking & Messaging – Teams, vehicles, and assets in real time.
  • Winlink Emergency Email – Send/receive without internet over HF/VHF/UHF.
  • VarAC & JS8Call – Low‑bandwidth coordination and group chat.
  • Packet BBS & Digipeating – Maintain local nets when infrastructure fails.

Real‑World Scenarios

  • Flood Response: 40 m HF Winlink carries relief traffic when networks fail.
  • Search & Rescue: 2 m APRS updates team positions and messages.
  • Storm Blackouts: 70 cm packet nodes support local EMCOMM.
  • POTA/SOTA & Off‑Grid: Lightweight KISS handhelds keep you connected.

Why Hams Trust KISS Modems

KISS modems aren’t just functional — they embody ham radio resilience. Seeing your 2 m APRS beacon appear on aprs.fi or relaying a 40 m Winlink message across Europe proves that amateur radio works when nothing else does.

  • Confidence: reliable comms when phones fail.
  • Resilience: readiness in your shack and go‑bag.
  • Community service: support EMCOMM and disaster relief.

Equip Your Emergency Go‑Bag

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