Favorable for mixed HF operating
Global snapshot · Updated recently · Path and direction still matter.
Playing Cards launching at SEAPAC 2026!
Ham Radio Tools, Band Plans, and Quick Reference Guides — In Your Pocket
Practical ham radio tools and references: band plans, antenna calculators, coax loss charts, grid square lookup, callsign prefixes, propagation projections, plus playing cards.
US Band Plan Reference Pages Check band privileges Play Solitaire
Current HF Conditions
Mock snapshot for build-time rendering
LUF
3.9 MHz
MUF
23.8 MHz
Global window: 3.9 – 23.8 MHz
SFI
146
Solar support
Solar flux — high is good
Kp
2.3
Mostly calm
Geomagnetic — low is good
A index
8
Background stability
Daily background — low is good
80m
Fair
40m
Good
20m
Excellent
15m
Good
10m
Fair
6m
Unlikely
Best bands now
20m, 15m, 40m
DX bands
20m, 15m
Regional bands
40m, 80m
These are estimates. Actual usability still depends on path, distance, direction, time of day, geomagnetic stability, and local noise.
Start Here
Check conditions, choose a band and frequency, then plan the path.
1. Check conditions
See what bands are worth trying
Open Full Propagation View first, then use MUF and LUF to narrow the safer checks.
2. Choose band and frequency
Move from idea to operating slot
Use Digital Mode Frequency Finder, the US Band Plan, and Band Privileges Lookup to pick a legal place to transmit.
3. Plan the path
Measure distance and aim the station
Finish with Grid Distance Calculator and Beam Heading Calculator before you call, turn the beam, or deploy the antenna.
Common Operating Tasks
Choose a band, then move straight into finding a frequency, building an antenna, or path planning.
Operating Slot
Find a Frequency
Frequencies for your mode and operating class. Digital Mode Frequency Finder, US Band Plan, Band Privileges
Cut Length
Build an Antenna
Turn wavelength into cut length. Wavelength Calculator, Antenna Designer, Coax Loss Calculator
Path Check
Plan a Contact
Check the path before you call. Grid Distance Calculator, Beam Heading Calculator, Full Propagation View
A Unified System of Ham Radio Tools
Tools for propagation, maps, antennas, and operating.
Antennas
Antenna sizing and cut-length work
- Wavelength Calculator for instant full-wave, half-wave, and quarter-wave lengths.
- Antenna Designer for dipole, EFHW, vertical, and Yagi starting points.
- Coax Loss Calculator to check feedline loss before installation.
- Wire Deployments for practical field setup patterns.
Operating
Frequency, privileges, and station checks
- Digital Mode Frequency Finder to get on an activity center fast.
- US Band Plan for band segments and operating classes.
- Band Privileges Lookup to confirm what your license can use.
- Battery Runtime Calculator for portable power planning before an operating session.
Mapping & propagation
Distance, heading, and path planning
- Grid Distance Calculator to measure path length between stations.
- Beam Heading Calculator to get initial and reciprocal azimuth.
- Grid Square Lookup to turn a place into a Maidenhead locator.
- Full Propagation View to decide which bands are worth checking first.
Essential Ham Radio Reference Pages
Reference pages for practical frequency guides, glossary help, callsign context, or propagation.
Callsign Prefixes
Lookup prefixes by country, region, and operating context.
Glossary
Decode operating shorthand, Q codes, and common radio terms.
Digital Frequency Reference
Band reference list for common digital-mode activity centers.
Solar Conditions
Solar flux, Kp, A index, solar wind, Bz, and flare context explained.
Portable operating reference
Keep the repeat checks in your pocket
Use HamDeck to make the decision on screen, then carry the frequencies, privileges, and quick reminders you reuse most with Ham Deck playing cards.
Shopping for a useful present? See HamDeck gift ideas for the buyer-focused version.
Field use
Quick operating reminders
Keep the details you check most when you are away from the browser.
Reference
Band and frequency checks
Carry common calling, digital, and operating reference without reopening a tool.
Companion
Offline backup to the tools
Use the cards as the portable companion to the same operating workflow you use here.
From browser to radio bag
Make the decision here, then keep the repeat reference with you.