[OZAPRS] HF APRS
Jack Chomley
radio at irock.com.au
Mon Feb 2 09:02:39 EST 2009
Ray,
I have not been on 20 metres much, but my SCS Tracker DSP TNC records
the freq error of stations ireceives and then sends out a beacon with
the callsigns and freq differences. Now, I have been using my Icom
718, so I have not relied too much on the errors, but I could hook up
my 7200 that has a .5PPM TCXO and see what happens ;-)
73 Jack VK4JRC
At 07:51 AM 2/02/2009, you wrote:
>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
>>>>>>>>
>>>>>>>>
>>>>>>>>This e-mail together with any attachments may be confidential or
>>>>>>>>privileged. If you are not the intended recipient please contact
>>>>>>>>us immediately and delete all copies. You are not permitted to
>>>>>>>>copy, disclose or use the content in any way. It is the
>>>>>>>>addressee's/ recipient's duty to virus scan and otherwise test
>>>>>>>>the information provided herewith. We do not warrant that the
>>>>>>>>information is free of any virus or any other defect or error.
>>>>>>>>Unless otherwise stated, views expressed within this email are
>>>>>>>>the author's own and do not represent those of Scott-Welsh
>>>>>>>>Holdings Pty Ltd
>>>>>>>>_______________________________________________
>>>>>>>>Ozaprs mailing list
>>>>>>>>Ozaprs at aprs.net.au
>>>>>>>>http://aprs.net.au/mailman/listinfo/ozaprs
>>>>>>>>
>>>>>>>_______________________________________________
>>>>>>>Ozaprs mailing list
>>>>>>>Ozaprs at aprs.net.au
>>>>>>>http://aprs.net.au/mailman/listinfo/ozaprs
>>>>>>>
>>>>>>_______________________________________________
>>>>>>Ozaprs mailing list
>>>>>>Ozaprs at aprs.net.au
>>>>>>http://aprs.net.au/mailman/listinfo/ozaprs
>>>>>>
>>>>>_______________________________________________
>>>>>Ozaprs mailing list
>>>>>Ozaprs at aprs.net.au
>>>>>http://aprs.net.au/mailman/listinfo/ozaprs
>>>>>
>>>>_______________________________________________
>>>>Ozaprs mailing list
>>>>Ozaprs at aprs.net.au
>>>>http://aprs.net.au/mailman/listinfo/ozaprs
>>>>
>>>_______________________________________________
>>>Ozaprs mailing list
>>>Ozaprs at aprs.net.au
>>>http://aprs.net.au/mailman/listinfo/ozaprs
>>>
>>
>>
>>_______________________________________________
>>Ozaprs mailing list
>>Ozaprs at aprs.net.au
>>http://aprs.net.au/mailman/listinfo/ozaprs
>>
>>
>
>_______________________________________________
>Ozaprs mailing list
>Ozaprs at aprs.net.au
>http://aprs.net.au/mailman/listinfo/ozaprs
_______________________________________________
Ozaprs mailing list
Ozaprs at aprs.net.au
http://aprs.net.au/mailman/listinfo/ozaprs
More information about the Ozaprs
mailing list