[OZAPRS] 30m hf Igate in OZ -August 2019 ?? AW: OZAPRS Digest, Vol 110, Issue 5 //WL2K

Mike Zwingl, OE3MZC oe3mzc at oevsv.at
Mon Jul 29 20:17:57 AEST 2019


Hi Carlos,
thank you for the kind offer.
ROBUST PACKET MODE  also called RPR is a proprietary mode from german company SCS -the inventors of PACTOR- so I guess you would need a DSP-TNC hardware modem or an SCS PACTOR Modem , that does support RPR.
Then you could connect it via USB or serial to the RASPI , ODROID or PC  running an APRS Gate Software.
The mode has 8 carriers with 50 baud each with adaptive OFDM modulation
that will tolerate a frequency offset of 800Hz, which is very helpful, when operating mobile with changing temperature..
and DSP-TNC can demodulate several signals at same time...
You can use it for hf-APRS and for PAcket BBS on HF.
adaptive speed is R300 and R600 Baud.
center frequency is 1500Hz and less than 500Hz BW.
I have heard that a normal sound card would not have sufficient timing stability to cope with this mode, but never tested...
73 de Mike, OE3MZC

  ----- Original Message ----- 
  From: Carlos 
  To: oe3mzc at oevsv.at ; Australian APRS Users 
  Cc: vk8mt at hamradio.org.au ; oe3mzc at winlink.org 
  Sent: Sunday, July 28, 2019 10:00 AM
  Subject: Re: [OZAPRS] 30m hf Igate in OZ -August 2019 ?? AW: OZAPRS Digest, Vol 110, Issue 5 //WL2K



  > Unfortunately nobody runs a Robust Packet Mode iGate in VK.

  Hi Mike, does it run on a Raspberry Pi or an Odroid like DireWolf ?

  Lots of experimenters here, so I'm sure that somebody would be happy to hack something together to try that new mode for you.


  73,
  Carlos VK1EA





  > Robust Packet Mode would be much more reliable, since it will accept 800Hz frequency drift and is a 50Baud OFDM signal, similar to some PACTOR modulations.
  >
  > However, I have seen there is also VK8JG-5 active on 30m.
  >
  > BTW: do you also know the 40m hfAprs Frequency?
  >
  > 73 de Mike
  >
  > -----Ursprüngliche Nachricht-----
  > Von: vk8mt at hamradio.org.au [mailto:vk8mt at hamradio.org.au]
  > Gesendet: Sonntag, 28. Juli 2019 08:28
  > An: oe3mzc at oevsv.at; 'Australian APRS Users' <ozaprs at aprs.net.au>
  > Betreff: RE: [OZAPRS] 30m hf Igate in OZ -August 2019 ?? AW: OZAPRS Digest, Vol 110, Issue 5
  >
  > Hi Mike
  >
  > For standard 300 Baud with the following audio pair 1600/1800 you should be on 10.147.60Mhz (not 10.147.30Mhz as mentioned).
  >
  > I was running somewhere between 50-70w into an Outbacker (taped whip).
  >
  > Cheers
  >
  > Mal
  >
  > -----Original Message-----
  > From: OZAPRS <ozaprs-bounces at aprs.net.au> On Behalf Of Mike Zwingl, OE3MZC
  > Sent: Sunday, 28 July 2019 6:13 AM
  > To: vk8mt at hamradio.org.au; 'Australian APRS Users' <ozaprs at aprs.net.au>
  > Cc: oe3mzc at winlink.org; oe3mzc at oevsv.at
  > Subject: [OZAPRS] 30m hf Igate in OZ -August 2019 ?? AW: OZAPRS Digest, Vol 110, Issue 5
  >
  > G`Day Mal,
  > tnx fer ur info.
  > This sound really promising!.
  > I will operate HF-APRS from Broome along Gibb River Road on 10,147,3 USB in ROBUST PACKET Mode and in traditional 300FSK mode.
  >
  > Hopefully these IGATES are still active.
  > Please contact me via Winlink if my signal is OFF-frequency...
  >
  > What was your antenna and power from ur mobile?
  >
  > 73 de Mike
  > OE3MZC & family
  > OE3FTA, OE3YCB
  >
  >
  > -----Ursprüngliche Nachricht-----
  > Von: vk8mt at hamradio.org.au [mailto:vk8mt at hamradio.org.au]
  > Gesendet: Samstag, 27. Juli 2019 01:31
  > An: 'Mike Zwingl, OE3MZC' <oe3mzc at oevsv.at>; 'Australian APRS Users' <ozaprs at aprs.net.au>
  > Betreff: RE: [OZAPRS] OZAPRS Digest, Vol 110, Issue 5
  >
  > Hi Mike
  >
  > The following iGates were all active on 30m in June, when I travelled from Darwin to Kalkarindji and back.
  >
  > VK8KMD-10
  > VK6LD-4
  > VK2OL-5
  > VK4MQ-4
  > VK4AB-4
  > VK5THB-4
  >
  > There are no doubt others, but these ones gated me, on the above trip. (I have once been gated via a European iGate.)  For the area that you are going to, I suspect that VK8KMD-10 will be the main provider, we will watch with interest!
  >
  > Cheers
  >
  > Mal
  >
  >
  > -----Original Message-----
  > From: OZAPRS <ozaprs-bounces at aprs.net.au> On Behalf Of Mike Zwingl, OE3MZC
  > Sent: Friday, 26 July 2019 10:49 PM
  > To: ozaprs at aprs.net.au
  > Subject: Re: [OZAPRS] OZAPRS Digest, Vol 110, Issue 5
  >
  > I am travelling 4WD the Kimberleys, BROOME, WA,  in August QRV on HF-APRS on 30m.
  > Is there a list of active Igates for 30m hf-APRS ??
  > pse help!
  >
  > 73 de Mike, OE3MZC
  >
  > ----- Original Message -----
  > From: <ozaprs-request at aprs.net.au>
  > To: <ozaprs at aprs.net.au>
  > Sent: Friday, July 26, 2019 4:00 AM
  > Subject: OZAPRS Digest, Vol 110, Issue 5
  >
  >
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  >> Today's Topics:
  >>
  >>   1. 40m gate in Perth (Tim Logan)
  >>   2. Re: 40m gate in Perth (Wade Smith)
  >>
  >>
  >> ----------------------------------------------------------------------
  >>
  >> Message: 1
  >> Date: Thu, 25 Jul 2019 20:46:40 +1000
  >> From: Tim Logan <timlog77 at gmail.com>
  >> To: OZAPRS at aprs.net.au
  >> Subject: [OZAPRS] 40m gate in Perth
  >> Message-ID: <03940694-B493-41F5-ACC8-1F7CAEF75E08 at gmail.com>
  >> Content-Type: text/plain; charset=us-ascii
  >>
  >> Not sure If VK6HAM is on this list, no issues with his gate receive
  >> performance, turned my HF mobile on tonight and got a beacon straight
  >> into it from my driveway in Southern NSW.
  >> Tim
  >> VK2HLT
  >>
  >> ------------------------------
  >>
  >> Message: 2
  >> Date: Thu, 25 Jul 2019 20:51:03 +1000
  >> From: Wade Smith <wade.vk1 at gmail.com>
  >> To: Australian APRS Users <ozaprs at aprs.net.au>
  >> Subject: Re: [OZAPRS] 40m gate in Perth
  >> Message-ID:
  >> <CABTWNHZgxk3YqpUHwS460nAhLO3P9hPpc42XKZ5DQ7fj39aKyQ at mail.gmail.com>
  >> Content-Type: text/plain; charset="utf-8"
  >>
  >> Thanks Tim that’s a new one - I hadn’t seen that come up.
  >>
  >> I am down the coast this weekend. So will fire up on 40.
  >>
  >>
  >>
  >> On Thu, 25 Jul 2019 at 20:47, Tim Logan <timlog77 at gmail.com> wrote:
  >>
  >>> Not sure If VK6HAM is on this list, no issues with his gate receive
  >>> performance, turned my HF mobile on tonight and got a beacon straight
  >>> into it from my driveway in Southern NSW.
  >>> Tim
  >>> VK2HLT
  >>> _______________________________________________
  >>> OZAPRS mailing list
  >>> OZAPRS at aprs.net.au
  >>> http://lists.aprs.net.au/mailman/listinfo/ozaprs
  >>>
  >> --
  >> -
  >> VK1MIC.com
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