[OZAPRS] HF APRS
Ray Wells
vk2tv at exemail.com.au
Mon Feb 2 09:28:41 EST 2009
Ian,
You've just jogged my memory, and it needs all the help it can get :-)
I used the waterfall display in Spectrum Lab to adjust my frequency and
I recall noticing 3MY was a tad low. I also noticed considerable
discrepancy between the highest and lowest frequencies.
Ray vk2tv
Ian Bennett wrote:
> Ray,
> When a mate of mine and myself were setting up the Wagner, we noticed VK3MY
> and it appeared to be low. The method we used to determine frequency was
> receiving through an ICOM IC-703 into a freq counter. Further checks were
> done with a IC-706MkIIG into MixW.
> If VK3MY is a net reference, I assume that means he sets the freq. That being
> the case, I'll do the MixW thing again and listen out for his txion and then
> adjust mine to suit.
>
> Ian
> VK1IAN
>
> On Mon, 2 Feb 2009 08:51:51 Ray Wells 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
>>>>>>>>>
>>>>>>>>>
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