FAA Plans to Change to Radios with 8.33 MHz spacing?

On 4/24/2013 12:53 PM, Mike the Strike wrote:
Unfortunately those "unused" 8.3kHz channels don't actually exist -
they are already occupied by the existing 25kHz channels. Also any
radio you use to transmit here in the USA has to be type approved and
current approval doesn't include the 8.3kHz units.

I don't understand the claim of "not approved" status: quite a few 8.3
kHz spacing units are available for sale in this country, including
Becker AR6201 and MGL V6 (the unit I use). Are these illegal to use on
the standard 25 kHz spacings?

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)

Radios for sale in the USA should have switchable 25kHz/8.3kHz spacing so that they can be used in areas where either standard is used - but they are only currently legal to use in the USA with 25kHz spacing.

Mike

On Wednesday, April 24, 2013 3:53:34 PM UTC-4, Mike the Strike wrote:
Unfortunately those "unused" 8.3kHz channels don't actually exist - they are already occupied by the existing 25kHz channels. Also any radio you use to transmit here in the USA has to be type approved and current approval doesn't include the 8.3kHz units.



Sorry!

poop!

On Apr 24, 12:53*pm, Mike the Strike wrote:
Unfortunately those "unused" 8.3kHz channels don't actually exist - they are already occupied by the existing 25kHz channels.

I would be surprised if a "25kHz" radio actually used more than 4kHz
on each side of the carrier, interfering with the "unsused" channels.

BUT, I would be much less surprised if a "25 kHz" radio, especially an
older one, was adversely affected by a transmission made 8.33 kHz
away.

Bart

On Apr 24, 4:31*pm, Tony V wrote:
The advantage of AM is that when two people talk at once you hear them
both. With FM, you get the strongest signal or, when both signals are
nearly equal in strength, you hear neither.

Plus, for weak signals, AM offers better signal to noise ratio. In
less technical terms, if pilot A has to really struggle to hear and
understand pilot B using AM, then pilot A would not hear anything if
they were using FM.

Bart