RE: [digitalradio] HF packet to internet & SCAMP questions

Mon, 07 Nov 2005 20:46:09 -0800

Hi Ralph,
 
From my perspective you have three choices for HF connectivity, but I would not call any of them real time since they are mailer type programs:
 
Winlink 2000 with a hardware modem which then could get you into an HF PMBO to send e-mail but you would be limited under normal circumstaces to a maximum 30 minute connect time per 24 hours if I remember the imposed time limit from their system.
 
JNOS2 which uses some of the same hardware selection but would probably require something at the home station.
 
PSKmail which is a newly developed system from a European ham that permits sending e-mail via an ARQ version of PSK63. Slower throughput, but much smaller footprint than many of the wide band ARQ modes, and of course no time limitations.
 
Winlink 2000 is primarily for Windows OS, JNOS for Linux or DOS, and PSKmail primarily for Linux.
 
You could use the Winlink 2000 system to access a Telpac to route e-mail if there is one close enough to you. Or you could set up a Telpac at your home QTH if you can reach it via VHF since Telpacs are designed for packet.
 
I have been a SCAMP beta tester and found it to be simply amazing in terms of its speed and care in not transmitting on a busy channel. It requires around a 10 db S/N ratio to work and that is often difficult to come by on HF so the developer is hoping to include additional modes as a fall back and that might work under weaker signal conditions. 
 
At this time the developer is working on other things so no SCAMP development has occurred since the spring. Hopefully this winter (in this hemisphere) he can return to working on it at times. The previous beta versions of Paclink SCD which is the SCAMP software, had a timer in them that make them quit working by a certain date and I believe we are well past that date so there is nothing you could test right now.
 
Maybe others can come up with some other solutions?
 
73,
 
Rick, KV9U
 
 
 
 
 -----Original Message-----
From: [email protected] [mailto:[EMAIL PROTECTED]On Behalf Of zl1tbg
Sent: Monday, November 07, 2005 17:55
To: [email protected]
Subject: [digitalradio] HF packet to internet & SCAMP questions
Hi,
Have been searching the web for existing methods to manage
connectivity between laptop + HF portable and HF home station + PC
which either is remote accessed or can transfer low rate data (email)
from its broadband (or dialup)
IP connection.

In principle, WinLink2000 might provide this functionality but as we
are putting up both ends of the system don't want to tie up part of
an international network - for what will be local / emergency
messages.

Alternately, is TelPac a suitable standalone?

SCAMP has been on test for a year, is it suitable / available to
download?

Comments please, particuarly what method to use to establish the
internet bridge. I realise its low data rate, just all the programmes
tried so far are not written with realtime file transfer capability
(DIGTRX, HamDRM etc) in mind.

73,Ralph ZL1TBG

The K3UK DIGITAL MODES SPOTTING CLUSTER AT telnet://208.15.25.196/
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