10M Radio (What is it ?)

[Robin1]

I am really sorry for all the questions but what is 10M radio and do they have the freqeuncy of 166MHZ

[troutboy]

Hi Robin1,
10m radio is the amateur portion of the bands for licenced amateurs to use.
When bands are called "metres" it's referring to the wavelength at which that band functions or "resonates". Antenna's works in relation to a bands wavelength, that's why different antenna's are needed for different bands.

166mhz is a VHF frequency usually used by ambulances and has no relation to 10m.

Hope this helps Robin1 mate.

[Robin1]

cheers

[troutboy]

10m by the way is located roughly around 28-30mhz, just next to the CB band (11m) which is roughly located around 26-28mhz.

[ryan_paul]

Troutboy has given an excellent description but here are some of the technical details.

The 10 metre Band covers 28.000 MHz to 29.700 MHz in the UK. This is at the top of the high frequency band.
All modes are allowed in this band (CW, SSB (usually USB), NFM, AM and the digital modes like slow scan TV and RTTY etc.
During periods of sunspot propagation is excellent and can be thousands of kilometres.
I think that the first transatlantic SSTV transmittion was made on 10 metre band.

166 MHz is also used for Private mobile radio or PMR such as Taxis, and other companies. In addition as Trooutboy says it can be used for ambulance, local councils and some shop watch systems.

cheers

[kc]

Just to confuse issues a little.
The meter band is a rough guide not an exact calculation. So the Amateur 10 meter band 28- 30 MHz is referred to as 10 meters. But CB is also on 10 meters as an exact mathematical calculation, not 11 meters as it's refered to. And 40 meter Amateur band = 42 meters.

If you want to calculate a meter band then it's a simple 300 divided by MHz for an exact figure.
so 300 divided by 6.6 MHz (Echo Charlie freq.) = 45.4545meters.
or 300 divided by 145,525 Mhz (2 meter FM channel S21) = 2.0615 meters.