[OZAPRS] Fw: Decoding HF APRS- tone pairs

[Mike Zwingl oe3mzc]

----- Original Message ----- 
From: "Mike Zwingl oe3mzc" <oe3mzc at oevsv.at>
To: <vk2xci at aanet.com.au>; "VK / ZL APRS Users" <ozaprs at aprs.net.au>
Sent: Friday, July 07, 2006 9:49 AM
Subject: Re: [OZAPRS] Decoding HF APRS- tone pairs


> if you see stations slightly off frequency this could be because many 
> users
> do not take into account differences in AFSK tones used in their TNC or
> SOUNCARD software.
> It is useless to say: tune to 10.151 LSB, when you dont specify the
tones
> (1600/188Hz)!
> following tone pairs are used:
> Frequencies Devices using them
> 1400/1600 Hz SCS Tracker, PTC-II
> 1600/1800 Hz Kantronics KAM, TAPR TNC2 (MFJ 127x. etc), TinyTrak3
> 2130/2230 Hz AEA/Timewave PK-232
> 1100/1300 Hz TigerTronics TigerTrak (300 baud HF mode)
> 2100/2300 Hz AGW Packet Engine softmodem (300 baud mode)
>
> hope this helps someone tuning
> also see http://www.aprs.net.au/hf_aprs_information.htm#Frequencies_
> vy 73 de Mike
> oe3mzc
> ----- Original Message ----- 
> From: "Norm, VK2XCI" <vk2xci at aanet.com.au>
> To: "VK / ZL APRS Users" <ozaprs at aprs.net.au>
> Sent: Friday, July 07, 2006 1:03 AM
> Subject: Re: [OZAPRS] Decoding HF APRS
>
>
>> As I found with my FT-107, frequency accuracy and stability are
>> absobloodylutely critical. It is the Achilles Heel of HF APRS
>>
>> Try resolving one of the other HF stations (what software?) and you'll
>> probably find that VK3MY is unresolvable and all the others are!!
>>
>> Colin Matten wrote:
>> > Hi Rob,
>> >
>> > A months or so ago I noticed VK3MY was slightly off frequency and 
>> > wasn't
>> > being decoded, I'll have a look today and see if it is still the
case.
>> >
>> > Regards
>> >
>> > Colin
>> >
>> > VK2KCM
>> >
>> > ----- Original Message ----- 
>> > From: "Rob" <vk4hab at rfcomms.com.au>
>> > To: <ozaprs at aprs.net.au>
>> > Sent: Thursday, July 06, 2006 11:33 PM
>> > Subject: [OZAPRS] Decoding HF APRS
>> >
>> >
>> >> Not sure if anyone can help me
>> >> I'm Trying to decode APRS on HF
>> >> I have a Dual Port Kantronics KAM XL
>> >> I find it excellent on VHF but when i tune it on HF i can decode
VK3MY
>> >> every time ok but all the other stations i seem to be having trouble
>> >> I'm using a Codan 7727 B tune to 10.147.10 USB
>> >> I can audible here other traffic ok anyone got any Ideas
>> >>
>> >> Cheers
>> >> de VK4HAB
>> >>
>> >> _______________________________________________
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>> >> Ozaprs at aprs.net.au
>> >> http://aprs.net.au/mailman/listinfo/ozaprs
>> >>
>> > _______________________________________________
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>> >
>> >
>> >
>>
>> -- 
>> Norm, VK2XCI,
>> Mildura, The Wintersun City
>> QF15bt
>>
>> Victoria, Australia.
>>
>>
>> -- 
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>>
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>
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