Solar flux — A number that tracks solar activity.
Higher numbers mean the upper bands are more likely to be open. Below about 90 the high bands struggle; above 130 they come alive.
Look this up in Pocket Elmer, along with 100 more
Related words
- Gray line — The band of twilight moving around the earth.
- Frequency — How fast a radio wave oscillates.
- SSB — Single Sideband. HF voice.
- SSTV — Slow-Scan Television.
- RTTY — Radio Teletype.
- Propagation — How your signal travels.
- Sporadic E — Sudden short-lived openings.
- FM — Frequency Modulation. VHF and UHF voice.