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

Chris Moulding chrism at crosscountrywireless.net
Thu Feb 18 22:48:27 UTC 2010


First transatlantic message sent and ack received:

G4HYG-2>APRSK63::NH7C-3   :Hello Sid!{30
NH7C-3yPSKao3::G4HYG-2    :ack30

This is only 12 hours after I put the program on the website. Is this a 
record?

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  



Chris Moulding wrote:
> 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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>>
>>
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>>   
>
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