[FARC] [Fwd: olivia 16/500 3.5835mHz net]

[Bob Moroney]

More digital info from Rolan W3FDK

73, Bob K9CMR

-------- Original Message --------
Subject: 	olivia 16/500 3.5835mHz net
Date: 	Sat, 28 Feb 2009 12:23:41 -0500
From: 	Rolan O. Clark <rolan.clark at comcast.net>
To: 	Lotsa Hams



All,


Tomorrow, Sunday, at 1000 (10:00 AM local) on 3.5835 mHz  USB  there 
will be a net using Olivia 16/500  hf digi with the hams in western pa 
who are experimenting with this mode. I will be net control to see how 
it works when this area becomes a net control and we will probably have 
some realys to work with but it is all in helping test hf comm.

 
The  program FLDIGI is what they use and I think it was developed for 
their use but other programs will work as  well.  Find

hf digi programs at http://w1hkj.com/
 

If you don't have something like a psk31 interface for hf then you can 
do the following if you want to  try it:

 

Connect ur radio external speaker jack to the line in on your sound card 
to decode what  is  sent.

 

When you tx, you  will hear the signal  over the computer speaker,  Just 
key your mike before you use your mouse to tx and hold your mic near the 
computer speaker while watching ur power out, don't exceed probably 25 
-30 watts because this is all power out, not like SSB which 100W SSB has 
about 30 watts average power. So,  key your mic and then click on the tx 
button on your program and hold  your mic close to the  computer speaker 
and when your are finished unkey the mic and use the mouse  to click off 
the  tx button.

 

When tx, you may want  to use  a rubber band to keep ur mic keyed and 
lay or hang it close  to the  computer speaker  so you can use your 
fingers to type  a response then slip the rubber  band  off and  click  
tx off on the program to end tx.

 

Olivia is slow but good copy even into the noise. Join the wpaNBEMS 
experimental net tomorrow if you wish, they are  looking for  more 
participants and if  you can't tx then you can listen by connecting ur 
radio audio to ur computer line in. wpaNBEMS is an acronym  for   
Western Pennsylvania Narrow Band Emergency Message System ( I think). I 
think the narrow band refers to the approx 500 hZ bw vs the wider bw of 
vhf packet and I believe this mode is FEC (forward error correcting) as 
well as other modes they use.

 

Take care,

 

73 de rolan w3fdk