RSSL Ham Radio Tools

Location & Navigation

1. GridMapper – Maidenhead Grid Locator
2. Distance & Bearing Tool

Time and Power

1. UTC ↔ SLST Time Converter
2. UTC Clock (Zulu)
3. Power Unit Converter (W ↔ dBm ↔ dBW)

Station Planning

1. Feedline + Connector Loss Calculator
2. SWR → Reflected Power

Emergency & Field

1. Battery Runtime + Duty Cycle
2. Coverage / Relay Spacing (VHF/UHF)
3. Emergency Go-Bag Checklist (Printable)

Antenna Builders

1. Vertical Radials Planner
2. EFHW Starter Lengths
3. Matching Stub Length Calculator

Contest & Logging

1. Contest Serial Number Generator
2. Quick QSO Log Line Builder