RadioBanter - View Single Post - Cross-band repeat & NBFM HTs

September 29th 04, 01:29 AM

On Sun, 26 Sep 2004 04:16:42 -0000, (Dave Platt)
wrote:

In article ,
Richard G Amirault wrote:

What is "narrow-band FM"??? Some could say that *all* FM ham radios use
"narrow-band" ... compared to a FM broadcast station.

True 'nuff. 5 kHz peak deviation seems to be standard here in the U.S.

I understand that in many European countries, amateurs have settled on
2.5 kHz peak deviation. This allows a larger number of repeaters to
be packed into a given amount of spectrum and geographic space...
and as the European 2-meter band is only half as wide as the U.S.
band, it seems like a good tradeoff.

Although not amateur currently about all of the US land mobile is
going to 2.5 KHz deviation also then onto 1.25 KHz by then the " audio
" will be digital most likely.

You can no longer import a Part 90 radio that has 25 Khz channel
spacing, they all must be 12.5 and could be electronically switchable
back to 25 KHz spacing a couple of years ago.