Icom IC-718

This document is unlikely to be of any interest to anyone but me. It's the map of frequencies of my radios at home. This map is for a radio with one hundred memories. The first digit describes the mode, and the second number describes the band. I am in IARU Region 1, so this list is restricted to those frequencies used either Region 1 or all Regions.

⟨mode⟩ + ⟨band⟩

The idea here is that the first digit of the memory number is for the mode and the second digit is for the band. This means that you can decide what mode you want to play with and scan the bands easily to see which are open and ready to communicate on. For example, if you wanted to try out JS8, you'd just scan the memories between 20 and 29 until you heard the characteristic sound of that mode.

Firstly, though, here are the HF bands in the UK with some brief notes.

Other guides to and descriptions of the HF bands:

Which band for which antenna?

I have moved the antenna information to another page.

Digital modes

1️⃣✳️→ FT8

FT8 is a communication protocol optimised for making contacts ('QSOs') with other stations even when the signal is very weak. You can use it to contact other stations even in challenging propagation conditions, high noise, low power or poor antenna setups. Only the bare essentials for making a contact are included - callsigns and signal strength reports are exchanged, and it's goodbye. This is not a chat mode. However, it's fun to see how far aware the responses are coming from and to check on a reporter map site to see who has heard you. The software required is either WSJT-X or its fork JTDX.

[10]→ 1.840MHz USB; [11]→ 3.573MHz USB; [12]→ 5.357MHz USB; [13]→ 7.074MHz USB; [14]→ 10.136MHz USB; [15]→ 14.074MHz USB; [16]→ 18.100MHz USB; [17]→ 21.074MHz USB; [18]→ 24.915MHz USB; [19]→ 28.074MHz USB.

Related links:

2️⃣✳️→ JS8

JS8 is a mode that's all about doing keyboard-to-keyboard messaging under weak signal conditions. FT8 is a robust digital mode, and JS8 builds on top of it by adding a keyboard messaging interface so that amateur radio operators can chat via keyboard even under challenging conditions. The software, JS8CALL, is a fork of WSJT-X but adapted for message passing. The protocol and software provide a message inbox, a heartbeat to keep track of when users are online, and routing of messages via intermediate stations.

👀 A detailed guide to operating with JS8 on this station is available.

[20]→ 1.842MHz USB; [21]→ 3.578MHz USB; [22] blank; [23]→ 7.078MHz USB; [24]→ 10.130MHz USB; [25]→ 14.078MHz USB; [26]→ 18.104MHz USB; [27]→ 21.078MHz USB; [28]→ 24.922MHz USB; [29]→ 28.078MHz USB.

3️⃣✳️→ PSK31

Before FT8 and JS8, a lot more people were using modes based on phase shift keying. They allow keyboard-to-keyboard communication, teletype-style. They were made popular with the fldigi suite. Of all these modes, PSK31 is the most popular, but PSK63 is used in contests. Modes with higher numbers are usually used for sending files. There are two flavours of modulation, binary and quadrature, but binary — BPSK31 — is much more popular.

[30]→ 1.838150MHz USB; [31]→ 3.580150MHz USB; [32] blank; [33]→ 7.040MHz (and up) USB; [34]→ 10.142150MHz USB; [35]→ 14.070150MHz USB; [36]→ 18.100150MHz USB; [37]→ 21.080150MHz USB; [38]→ 24.920150MHz USB; [39]→ 28.120150MHz USB.

Related links:

4️⃣✳️→ WSPR

WSPR is for people interested in understanding propagation paths for low-power signals. The message is even more spartan than for FT8. It transmits the station's callsign, its grid locator, and the transmitter power. Stations around the world report the reception of the signal to the internet. This reporter network is called WSPRnet and it shows operators how far their signals went on a map (and a backup map). WSPR operates in a narrow 2.5kHz bandwidth with signals with a signal-to-noise ratio as low as -28dB. That is, the noise can be 630 times more powerful than the signal, and the message will still get through. It's good for incredibly weak signals.

[40]→ 1.8366MHz USB; [41]→ 3.5686MHz USB; [42] blank; [43]→ 7.0386MHz USB; [44]→ 10.1387MHz USB; [45]→ 14.0956MHz USB; [46]→ 18.1046MHz USB; [47]→ 21.0946MHz USB; [48]→ 24.9246MHz USB; [49]→ 28.1246MHz USB.

Related links:

Analogue modes and CW

5️⃣✳️→ Slow-scan television

Slow-scan television (SSTV) or 'narrowband television' is about transmitting and receiving still pictures. There are many modes for this within SSTV, e.g. Robot, Martin and Scottie. You choose a picture you like, add some text like CQ SSTV 2E0RLZ to make it into a CQ, and send it out around the world. It's shitposting images, for the pre-internet world.

[50] blank; [51]→ 3.73MHz LSB; [52] blank; [53]→ 7.165MHz USB; [54] blank; [55]→ 14.230MHz USB; [56] blank; [57]→ 21.340MHz USB; [58] blank; [59]→ 28.680MHz USB.

Related links:

6️⃣✳️→ SSB voice centres of activity

Voice traffic (sometimes called 'telephony') takes place across these bands, but there's usually a centre of activity to start at and kind of tune around. We're not really interested in contesting traffic here, more the kind of signals where people could be having 'normal' conversations. However, some bands don't make this distinction, and other modes just have 'all modes' in most segments, so I've just done my best to choose a starting point for exploration.

Conventionally, LSB is used at frequencies below 10MHz and USB at frequencies above. The exception is the 5MHz band, for which the RSGB recommend use of the upper sideband. Therefore:

[60]→ 1.920MHz LSB; [61]→ 3.675MHz LSB; [62]→ 5.3325MHz USB; [63]→ 7.155MHz LSB; [64]→ blank; [65]→ 14.325MHz USB; [66]→ 18.144MHz USB; [67]→ 21.3005MHz USB; [68]→ 24.965MHz USB; [69]→ 28.660MHz USB.

7️⃣✳️→ QRP (low power) Morse

These frequencies are typically used for transmitting Morse at low power. Morse is great at this. You can use a solar panel to make a tiny 5W station which can happily communicate with other continents. It is the original low power mode. There are of course other frequences for Morse chatter, but these are the ones dedicated to low power.

[70]→ 1.836MHz CW; [71]→ 3.560MHz CW; [72] blank; [73]→ 7.030MHz CW; [74]→ 10.106MHz CW; [75]→ 14.060MHz CW; [76]→ 18.086MHz CW; [77]→ 21.060MHz CW; [78]→ 24.906MHz CW; [79]→ 28.060MHz CW.

8️⃣✳️→ FISTS Morse

The FISTS CW Club 'supports the use, preservation and education of Morse code'. I don't know Morse code myself, but these frequencies are the ones they use. Software like fldigi can decode Morse transmissions, so occasionally I listen in on these frequencies in the CW mode and try to decode them.

[80]→ 1.818MHz CW; [81]→ 3.558MHz CW; [82] blank; [83]→ 7.028MHz CW; [84]→ 10.118MHz CW; [85]→ 14.058MHz CW; [86]→ 18.085MHz CW; [87]→ 21.058MHz CW; [88]→ 24.908MHz CW; [89]→ 28.058MHz CW.

9️⃣✳️→ AX/25 Packet

Some of these bands have frequencies worldwide but which are discouraged in the UK by RSGB band plan.

[90] blank (not used); [91] 3.595MHz LSB (3.590-3.600MHz); [92] blank; [93] blank (not used); [94] 14.094 LSB (not used on 30m, so we borrow a range from 20m); [95] 14.105 LSB (14.089-14.112MHz, but not 14.099-14.101 which is reserved for beacons). As well as being the midpoint of the second segment, this is the frequency of the well-known Network 105, mostly used for point-to-point communications; [96] blank; [97] 21.110MHz LSB (21.100-21.120MHz); [98] blank; [99] 28.135MHz LSB (28.120-28.150MHz).

Other frequencies


Sites you might want to use when radiofurtling