[OZAPRS] HF APRS

Ray Wells vk2tv at exemail.com.au
Mon Feb 2 07:59:26 EST 2009


I'll bet Scott was surprised to find he's moved from the Apple Isle to 
vk2. He is, of course, vk7hse.

Ray vk2tv

Ray Wells wrote:
> Kinda looks like there's plenty of standards from which to choose.
>
> I'm using 14105.09 USB (1600/1800Hz) because there was previous 
> activity there in VK. When my heard list included an Italian station I 
> went searching and found that there were quite a number of 
> international stations also using the same frequency that I'm on.
>
> It looks as if there are two principal 20m aprs frequencies. The 
> question for VK is, which one should we use? Given that there was 
> general acceptance of a bbs also being available on an aprs frequency 
> for travellers, perhaps I (we) should stay put. I doubt that there 
> will ever be enough bbs traffic on the 20m frequency for it to be 
> considered a nuisance - there are no bbs mail broadcasts, and access 
> currently requires a connection to my node (vk2tv-1) first, and than a 
> connection from there to the bbs. The connection procedure could 
> change to a direct connection but that won't increase the traffic level.
>
> With 20m Igates in their (renewed) infancy in VK, now is the time to 
> decide which way we want to go.
>
> Already Scott vk2hse and myself have gates running, and perhaps 
> Samantha has a gate running as well. Are there others, like the one in 
> vk6?
>
> Discussion please.
>
> Ray vk2tv
>
>
> Michael Zwingl, OE3MZC wrote:
>> HF-APRS 14.103 LSB 300Baud (1600/1800Hz tones)
>>
>> see:
>>
>> 80m      3610                USB                Robust-PR 
>> 1500Hz          via DB0UAL robust pr
>> 40m      7032,6             USB                300 Baud FSK 1700Hz
>> 40m      7035                LSB                300 Baud FSK 1700Hz
>>
>> 30m      10.147,6          USB                300 Baud FSK            
>> 1700Hz world wide HF-APRS
>> 30m      10.151             LSB                300 Baud FSK 
>> 1700Hz           same QRG as above!
>> 30m      10.147,3          USB                Robust-PR 
>> 1500Hz           world wide RPR-APRS
>>
>> 20m      14.102,0          USB                Robust-PR 
>> 1500Hz           via DB0UAL robust-PR
>> 20m      14.103             LSB                300 Baud FSK 
>> 1700Hz           world wide HF- APRS
>> 20m      14.103,3          LSB                Robust-PR 
>> 1500Hz           world wide RPR-APRS
>>
>> 17m      18.102             LSB                300 Baud FSK 1700Hz
>>
>> 15m      21.117             LSB                300 Baud FSK 1700Hz
>>
>> 10m      29.250             FM                1200 Baud FSK           
>> 1700Hz 1000 Hz shift
>>
>> check your AFSK center frequency of your TNC or Soundcard modem, 
>> since every model has different tones,
>> which will result in a different DAIL-QRG. For normal 300 baud packet 
>> mode a hf-frequency accuracy
>> of +-20Hz is essential. For Robust-Packet mode (OFDM) frequency drift 
>> of abt. +-240Hz is allowed.
>> Do not overdrive (overmodulate) your transmitter. Check for 
>> distortion due to hf ingress and
>> keep your signal clean and narrow in bandwith.
>> ----- Original Message ----- From: "David and Justine Olsen" 
>> <davejust at bigpond.net.au>
>> To: "Australian APRS Users" <ozaprs at aprs.net.au>
>> Sent: Friday, January 02, 2009 11:55 AM
>> Subject: Re: [OZAPRS] HF APRS
>>
>>
>>> I believe 14109, someone will correct me if I am wrong
>>>
>>>
>>>
>>>
>>> On 2 Jan 2009, at 20:50, Samantha Scafe wrote:
>>>
>>>> freq?
>>>> ----- Original Message ----- From: "David and Justine Olsen" 
>>>> <davejust at bigpond.net.au>
>>>> To: "Australian APRS Users" <ozaprs at aprs.net.au>
>>>> Sent: Friday, January 02, 2009 7:25 PM
>>>> Subject: Re: [OZAPRS] HF APRS
>>>>
>>>>
>>>>> Prefer 20m
>>>>> so standard calls can use it
>>>>> On 2 Jan 2009, at 18:54, Samantha Scafe wrote:
>>>>>> Hi
>>>>>>
>>>>>> Just enquiring is there a need for a hf gate in cairns.  If  
>>>>>> there  is I am more then willing to facilate it
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> Kind Regards,
>>>>>>
>>>>>> Samantha Scafe
>>>>>> System Administrator
>>>>>> Scott-Welsh Holdings Pty Ltd t/as
>>>>>>              Regional Internet Connect
>>>>>>              Aussiewide Internet
>>>>>>              Cairns Net Services
>>>>>>
>>>>>> EMAIL: samantha at regionalconnect.com.au
>>>>>> WEB: www.regionalconnect.com.au
>>>>>>             www.cairns.net.au
>>>>>>
>>>>>>             www.aussiewide.com
>>>>>> ADSL  :  DIALUP  :  WEB HOSTING  :  3G WIRELESS  :   ADSL2+  :    
>>>>>> MAIL HOSTING  :  VOIP  :  HARDWARE
>>>>>>
>>>>>>
>>>>>>
>>>>>> HEAD OFFICE:  1/82 LAKE STREET, CAIRNS, QLD 4870
>>>>>> POSTAL ADDRESS: PO BOX 1282, CAIRNS, QLD 4870
>>>>>> CAIRNS: 0742220707  | TOWNSVILLE: 0747954504 | BRISBANE:  
>>>>>> 0731177610  | GOLDCOAST: 0756683106 | MELBOURNE: 0386859275 |  
>>>>>> SYDNEY: 0281979774
>>>>>>
>>>>>>
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