[aprssig] Q: Voice Alert freqs...? Results...

[Ray Wells]

Australia has pretty much standardised on 145.175 now.

Australia has historically avoided using 100Hz because of its second 
harmonic relationship with our mains electricity supply.

123Hz is commonly used for voice repeaters.

Ray vk2tv

Steve Noskowicz wrote:
> Thanks folks.  I did some searching and got everything that was posted here.  It sounds like there can be some changes in the future.  It seems to me that all land connected and close countries should have the same tone.  I'm not sure why it can't be one freq worldwide....
> Something that does not have a 50/60 Hz problem...    (:-o)
>
> Since RF frequencies were also on some of the sites, I decided to add them.
>
> Here's what I have so far:
>
> Worldwide info:
> - North America 144.390 MHz   Voice Alert = 100 Hz.
> - Australia 144.900 MHz or 145.175  MHz Voice Alert = 91.5 Hz.
> - Europe 144.800 MHz  Voice Alert = 136.5 Hz.  (also Finland & Ireland)
> - Norway Voice Alert = 123 Hz.
> - New Zealand: 144.575 MHz
> - Argentina: 144.930 MHz
> - Japan: 144.640 MHz (KYUSHU region:144.660 MHz.)
> - Russia: 144.800 MHz
>
> - Australia (VK): 439.100 MHz 1200 baud (in selected areas) 
> - Netherlands (PA): 430.5125 MHz 1200 baud 
> - Puget Sound, WA: 440.875 MHz 1200/9600 baud 
> - Puget Sound, WA: 440.800 MHz 9600 baud 
> - Kansas / Missouri: 446.175 MHz 1200 baud (primary, with infrastructure) 
> - Kansas / Missouri: 441.175 MHz 1200 baud (secondary / special event, no infrastructure) 
> - US Nationwide Proposed: 445.925 (proposed by Bob WB4APR) 
> - New Zealand (ZL): 432.575 MHz 1200 baud allocated but little usage
>  NOTE:  Not all of these have been fully adopted in some countries, so this is not the final word. One Australian web site says Voice Alert is 123.0 Hz.  However I have been told this is a voice repeater tone used especially for  IRLP and EchoLink systems.  [http://www.russellcoarc.org/aprs.htm  ]
>
> -- 73, Steve, K9DCI
>
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