Gerard Hill gerardvk2io at gmail.com
Tue Apr 8 12:24:14 EST 2014

About 4 years ago a bunch of us started experimenting with PSK 
<http://wa8lmf.net/APRS_PSK63> for APRS on HF. We used the APRS 
Messenger <http://www.crosscountrywireless.net/aprs_messenger.htm> 
software which supported a variety of speeds from 31 to 250 bps. It 
proved far superior to FSK300 packet. I ended up running an IGate on 
7034.7 kHz and a receive-only IGate on 10149.7 kHz. These PSK ports 
closed 2 years ago.

APRS Messenger requires a PC running Windows and continues to be 
developed so now supports GMSK250 
and MFSK16 modes as well as PSK63 and PSK250. APRS messages contain a 
checksum allowing posits to be verified before injection into the 
APRS-IS. It is great software for the shack, not so convenient in the 
mobile where a compact tracker is needed.

Last year, the FreeTrak63 
<http://www.ringolake.com/pic_proj/FT63/ft63_page.html> was developed 
for mobile use. It can generate PSK63 and MFSK16. Blank PCBs are available.

Anyone interested in trying PSK63 for APRS?
I'm running it on 10149.7 at the moment using VK2IO-63.

Gerard - VK2IO

On 4/04/2014 8:00 AM, Andrew Rich wrote:
> Psk had very good noise performance
> Psk63 is faster than psk31
> No error check tho
> Sent from my iPhone
>> On 4 Apr 2014, at 6:58 am, Matt VK2RQ <matt.vk2rq at gmail.com> wrote:
>> This is an interesting article on that topic:
>> http://wa8lmf.net/APRS_PSK63/
>> 73,
>> Matt VK2RQ
>>> On 4 Apr 2014, at 7:37 am, Shaun <vk2xpp at optusnet.com.au> wrote:
>>> What is the advantage of psk63?
>>> Brief reply only from my iPhone
>>>> On 3 Apr 2014, at 17:56, Andrew Rich <vk4tec at tech-software.net> wrote:
>>>> Just got a icom 7000 and scs packet modem will see if it does psk63
>>>> Sent from my iPhone
>>>>> On 3 Apr 2014, at 2:49 pm, Andy Nguyen <an at comms.net.au> wrote:
>>>>> Thanks Mark,
>>>>> Just checking :)
>>>>> Regards
>>>>> Andy VK3YT
>>>>>> On 3 Apr 2014, at 3:35 pm, Mark Jessop <lenniethelemming at gmail.com> wrote:
>>>>>> Planning on a HF balloon payload there Andy?
>>>>>> And AFAIK there's no PSK capable iGates in Australia.
>>>>>> - Mark VK5QI
>>>>>>> On 3/04/14 3:04 PM, Andy Nguyen wrote:
>>>>>>> Hi all,
>>>>>>> Do we have any iGate on HF (30m) in Australia that supports PSK63 ?
>>>>>>> Regards
>>>>>>> Andy

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