[OZAPRS] HF APRS
Ray Wells
vk2tv at exemail.com.au
Mon Feb 2 08:51:51 EST 2009
Hi Ian,
I wonder if propagation is the problem? I can't say emphatically that
I'm "on frequency" but the rig is a Codan running a full Codan spec
crystal which are generally very reliable. The Codan uses a single
crystal for both tx and rx so if one is off, so is the other.
My heard list is light on today but it has been reasonably full. So, is
it Mother Nature, or have I shifted?
Maybe others would like to comment on my frequency status, although, one
of the stations I've logged (over 13,000 packets) is vk3my, a net
frequency reference station. Based on that I'm inclined to blame Mother
Nature.
Ray vk2tv
Ian Bennett wrote:
> Hi Ray,
> Pardon my ignorance but I thought the 30m freq was 10147.6KHz when using
> 1600/1800 Hz tones.
> Answers a few questions though. A few weeks ago I was 50Hz down and was
> getting in through you but now I am on 10147.6Khz, I'm only in through VK4UN
> and VK5LY.
>
> Ian
> VK1IAN
>
> On Mon, 2 Feb 2009 07:45:21 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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