Scanning 2m and 70cm

[Rufus19692001]

As above,.. Should I be listening on narrow or wide fm for the best results? I'm in the UK. Many thanks.

 

[morfis]

Narrow would be correct but 'best results'...probably something other than radio amateurs unless you have a very high boredom threshold

Wide FM is pretty much only used for the carp between 88 and 108 MHz

 

[nd5y]

It depends on what kind of receiver you have and its filter bandwiths.

Some scanners and other receivers will have three FM bandwidths:
NFM = 2.5 kHz deviation / 11-12.5 kHz bandwidth
FM = 5 kHz deviation / 16-25 kHz bandwidth
WFM = 75 kHz deviation / 180-200 kHz bandwith (only for FM broadcast band)

For amateur radio and land mobile radio:
Narrow = 2.5 kHz deviation / 11.2 kHz bandwidth
Wide = 5 kHz deviation / 16 kHz bandwidth

In the UK as far as I know all amateur radio FM on the 2m band (144-146 MHz) is narrow.
I don't know if 70 cm (430-440 MHz) is narrow or wide.

 

[Rufus19692001]

Cheers fellas, that helps. What threw me was coming across a crystal clear transmission on 2m fm wide briefly. Keeping all my saved channels on narrow now.