6 metres

From Amateur-radio-wiki
Jump to: navigation, search

Other VHF/UHF/Microwave wiki pages : 13 centimetres, 9 centimetres, 6 centimetres,3 centimetres 1.25 centimetres and Bands above 24GHz.

Band: 6m
Bands
160m 80m 60m 40m 30m 20m 17m 15m 12m
10m 6m 4m 2m 1.25m 70cm 33cm 23cm 3cm
Band Privileges
US Extra 50-54
US Advanced 50-54
US General 50-54
US Technician 50-54
UK (all) 50-52

6 metres is often known as the "Magic Band", because its propagation is so uncertain and can change very quickly. The band extends from 50 MHz to 54 MHz, apart from in some countries, such as the UK.

Equipment

Single-band 6 metre gear used to be common, but has largely fallen out of use. However, many modern HF rigs have added 6 metres to the bands supported. Rigs in current product that support all-mode 6 metre operation include the Alinco DX-70TH, Icom IC-706 Mk IIG, Yaesu FT-857ND, and Kenwood TS-480SAT. Some HTs support 6 metre FM in addition to other bands, such as the Yaesu VX-7R and Icom IC-T90A.

Modulation

The lower end of the band is dedicated to weak-signal work using CW and SSB. The upper 2 MHz of the band is generally used for FM. Some areas have 6 metre FM repeaters.

Propagation

Most communication paths on 6 metres are line-of-sight. In many ways, the band behaves like other VHF bands. However, sporadic E propagation is not unusual, and F2 propagation occurs during daylight hours at the peak of the solar cycle. 6 metres is the highest frequency amateur band that can support F2 propagation.

DXing is popular on 6 metres. However, unlike DXing on the HF bands, which typically involves communication from one continent to another, most 6 metre DX is done from state to state (within the United States) or country to nearby country (such as one European nation to another). DXCC has been earned on 6 metres, but is very challenging.

Interference Issues

This part of the amateur spectrum is more prone to radio frequency interference than other parts of the amateur spectrum. Natural noise is high on the band, and mobile use in automobiles often requires careful attention to suppressing stray RF emanations from the vehicle's electrical system. A properly-configured 6 metre mobile station can be very effective.

Interference from 6 metre stations to broadcast receivers may also be problematic in countries where the band is adjacent in frequency to television signals (such as VHF channel 2, 54-60 MHz in North America NTSC-M). A poorly-designed broadcast receiver may be susceptible to overload due to the presence of a nearby and powerful adjacent-channel signal.

Australian Bandplan

Access :

50 - 52 MHz Advanced licensees only

52 - 54 MHz Advanced & Standard licensees


Vk4yeh vk 6m bandplan.jpg


Bands
HF and MF 160 metres * 80 metres* 60 metres * 40 metres * 30 metres * 20 metres * 17 metres * 15 metres * 12 metres * 10 metres
VHF 6 metres * 4 metres * 2 metres * 1.25 metres
UHF 70 centimetres * 33 centimetres * 23 centimetres * 13 centimetres
Microwave 9 centimetres * 6 centimetres * 3 centimetres * 1.25 centimetres * Bands above 24GHz
See also US bandplan