bands-and-modes
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bands-and-modes [2022/01/29 18:40] – Added sats on 2m / 70 cms. and CW on 2m m7smu | bands-and-modes [2022/01/30 16:54] (current) – m0lte | ||
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- | ====== Bands and Modes ====== | + | ==== Bands and Modes ==== |
This page is meant as a modern non-exhaustive high level reference of what kinds of propagation and activity you will typically find on the common amateur radio bands. It may be UK-centric. | This page is meant as a modern non-exhaustive high level reference of what kinds of propagation and activity you will typically find on the common amateur radio bands. It may be UK-centric. | ||
- | ^ Band ^ Daytime | + | === Your contributions welcome! === |
- | | 160m | Ground wave (120km) | + | |
- | | 80m | Ground wave / NVIS | DX | Lots of long-winded chat. Massively busy during contests. | Everything, lots of SSB and CW and data | | + | |
- | | 60m | Ground wave / NVIS | DX and local | Channelised, | + | |
- | | 40m | Often open worldwide | + | |
- | | 30m | Open worldwide | Generally closes after sunset | Very narrow HF band | Data/CW only, no voice allowed | | + | |
- | | 20m | Open worldwide | + | |
- | | 17m | | | " | + | |
- | | 15m | | | Big wide allocation, not much traffic | SSB, CW, FT8 | | + | |
- | | 12m | | | No contests. | SSB, CW, FT8 | | + | |
- | | 10m | Generally closed but opens when the MUF gets up this high, then comes to life! | Generally closed, but try grey-line to Japan (AM), South America (PM) | Massive wide band, great for local experimentation, | + | |
- | | 6m | Normally no atmospheric prop | Normally no atmospheric prop | "The magic band". Sporadic E propagation makes this band look like 20m for really short periods in the spring. | FT8, SSB, FM, repeaters! | | + | |
- | | 4m | Normally no atmospheric prop | Normally no atmospheric prop| Pockets of activity around the country. Similar to 2m. | Mostly FM, but more SSB now the IC7300 exists. | | + | |
- | | 2m | Normally no atmospheric prop | Normally no atmospheric prop | Pretty much as high as sporadic E propagation ever gets. Tropospheric enhancements can open 2m up as far as southern Europe sporadically. | FM simplex, FM repeaters, APRS (including ISS), FT8, SSB, pockets of AX.25 packet. There' | + | |
- | | 70cm | Normally no atmospheric prop | Normally no atmospheric prop | Shared with ISM / other users, some geographic restrictions on use, check your licence | FM repeaters, FM simplex, some amateur TV, lots of bleeps and bloops to decode. Satellites in this band too. | | + | |
- | | 23cm (1.2GHz) | Normally no atmospheric prop | Normally no atmospheric prop | Is present on IC-9700 | SSB, repeaters, beacons, ATV | | + | |
- | | 13cm (2.4GHz) | Normally no atmospheric prop | Normally no atmospheric prop| Used as the uplink band for QO-100 geostationary satellite ops. Unfortunately not open to Foundation licence holders | ATV, SSB | | + | |
- | Notes: | + | Please edit this page directly or make suggestions via # |
- | * All bands are open all the time within line of sight. This is different from " | + | |
- | * CW is Morse code | + | ^ Band ^ Daytime |
+ | | 160m \\ 1.81-2MHz | ||
+ | | 80m \\ 3.5-3.8MHz | ||
+ | | 60m \\ 5MHz | Ground wave / NVIS | DX and local | Channelised, | ||
+ | | 40m \\ 7.0-7.2MHz | ||
+ | | 30m \\ 10.1-10.15MHz | ||
+ | | 20m \\ 14.0-14.35MHz | ||
+ | | 17m \\ 18.068-18.168MHz | | | " | ||
+ | | 15m \\ 21.0-21.45MHz | ||
+ | | 12m \\ 24.89-24.99MHz | ||
+ | | 10m \\ 28.0-29.7MHz | ||
+ | | 6m \\ 50-52MHz | ||
+ | | 4m \\ 70-70.5MHz | ||
+ | | 2m \\ 144-146MHz | ||
+ | | 70cm \\ 430-440MHz | ||
+ | | 23cm \\ 1240-1325MHz | ||
+ | | 13cm \\ 2300-2450MHz | ||
+ | |||
+ | ==== Notes ==== | ||
+ | |||
+ | * All bands are "open" | ||
+ | * A band is " | ||
+ | * Generally speaking, the MUF is low overnight and high during the day. Bands will "go long" or "go short" as the critical angle - the angle at which RF reflects off ionosphere layers changes. | ||
+ | * When thinking about propagation, | ||
+ | * CW is Continuous Wave. Morse code is the usual method of using CW. | ||
* Simplex is radio-to-radio | * Simplex is radio-to-radio | ||
* NVIS is " | * NVIS is " | ||
Line 31: | Line 39: | ||
* Both of those sets of bands are largely accessible using homebrew equipment only | * Both of those sets of bands are largely accessible using homebrew equipment only | ||
* It can be somewhat of a surprise to newcomers that chatting around the UK can be surprisingly difficult. If this is your goal, try 160m, 80m, 40m NVIS and/or ground/ | * It can be somewhat of a surprise to newcomers that chatting around the UK can be surprisingly difficult. If this is your goal, try 160m, 80m, 40m NVIS and/or ground/ | ||
+ | * Rule of thumb: No FM on HF, CW at the bottom of each band, then data modes, then SSB/ | ||
- | ====== Some interesting spot frequencies | + | ==== Some interesting spot frequencies ==== |
- | ^ Band ^ Frequency ^ What/ | + | ^ Band ^ Frequency |
- | | 20m | 14.230 | + | | 2m | 144.800 |
- | | 20m | 14.074 | + | | 2m | 145.800/825 | ISS downlink |
- | | 30m | 10.000 | + | | 20m | 14.230 |
- | | 80m | + | | 20m | 14.074 |
- | | 40m | + | | 30m | 10.000 |
- | | ... | ... | + | | 40m |
+ | | 80m | ||
+ | | 160m | 1.933 | 1933 net | ||
+ | | ... | ... |
bands-and-modes.txt · Last modified: 2022/01/30 16:54 by m0lte