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[aprssig] NH7C-3 on APRS Messenger - APRS over PSK-63

Chris Moulding chrism at crosscountrywireless.net
Thu Feb 18 22:36:25 UTC 2010


Sid,

I've copied you over here in north west England IO83sn.
Sending you a message now.

73,

Chris, G4HYG

Chris Moulding
Cross Country Wireless (2009) Ltd
7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
Tel/fax: +44(0)1204 410626
Mobile:  +44(0)7752 391908
Website: http://www.crosscountrywireless.net
Company number 6780346 registered in England and Wales  



Sid at NH7C.com wrote:
> Hello All,
>
> I am up on APRS Messenger as of 20 minutes ago.
>
> My first spot/QSO on APRS over PSK-63 was with WB8SKP-2, followed by a
> report via APRS from KJ4ERJ-12.
>
> Who is next in the log?
>
> Sid NH7C-3
>
> -----Original Message-----
> From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
> Of Chris Moulding
> Sent: Thursday, February 18, 2010 5:21 AM
> To: TAPR APRS Mailing List
> Subject: [aprssig] APRS Messenger now has APRS over PSK-63
>
> I've released the latest version of the APRS Messenger v 2.26 program.
>
> The biggest change is that APRS over PSK-63 has been added. This has been
> tried before with an add-on to UI-View but that had problems sending packets
> with errors to the APRS-IS system. I've added a preamble, start and stop
> flags and a strong checksum to each packet so that each received packet is
> checked as correct before being sent to the internet.
> The display will show all packets received even with errors so that weak
> signals can still be read manually. A frequency hopping routine has been
> added to the PSK-63 receiver to allow rapid signal acquisition over a +/- 50
> Hz range. A Tune option allows the operator to send a carrier + 150 Hz in
> frequency to avoid interference to other APRS over PSK-63 users. The program
> uses the PC soundcard in a similar way to other digimode programs.
>
> The program comes in three versions with different PSK-63 audio tone
> frequencies, 700, 1300 and 2100 Hz.
>
> The second change is the addition of a receive only Igate. All HF or VHF
> packets received can be sent to the APRS-IS. If the connection to the APRS
> server is lost it automatically retries 1 minute later.
>
> Future developments will include a GPS option for mobile HF tracking.
>
> If you want to try APRS over PSK-63 on HF I'm running an Igate on 10.1497
> MHz. Set your receiver to a dial frequency of 10.1476 MHz USB with the
> 2.1 kHz
> version. Please note that the dial frequency is the same as used for
> existing HF 300 bd packet APRS so it will work with existing HF APRS
> set-ups. In the US Lynn KJ4ERJ is also running an APRS over PSK-63 Igate on
> 10.1476 MHz.
>
> The software is freeware and can be downloaded from the following webpage:
>
> http://www.crosscountrywireless.net/aprs_messenger.htm
>
> A Yahoo group for discussion on this and other topics:
>
> http://uk.groups.yahoo.com/group/cross_country_wireless
>
> See you on the waterfall!
>
> 73,
>
> Chris, G4HYG
>
> --
> Chris Moulding
> Cross Country Wireless (2009) Ltd
> 7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
> Tel/fax: +44(0)1204 410626
> Mobile:  +44(0)7752 391908
> Website: http://www.crosscountrywireless.net
> Company number 6780346 registered in England and Wales  
>
>
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