HF APRS

seatcp@wetnet.seatcp.net seatcp@wetnet.seatcp.net
Mon, 13 May 2002 15:49:51 +0000


Thanks Bill,

Do you know of any Xtal transceivers, maybe a kit, that 
work at 10.151?

Steve N0FPF
> At 02:29 AM 5/13/02 +0000, s.monsey@att.net wrote:
> >Howdy,
> >
> >Anyone doing HF APRS? I have a list of questions!
> 
> I was.  Digi_ned has a "flaw" that doesn't lead it to act as a
> gateway like I was using, so lacking the time to fix it - I just turned
> things off for a while.
> 
> >Are you using the 10.151 frequency?
> 
> Yes.  LSB.   Actually  10.149.2 and 10149.4 (I think) for the
> mark and space frequencies.
> 
> There is some European activity on 14.105 but the BBS operators
> on the same frequency are complaining.
> 
> >How many watts minimum does it seem to require?
> 
> I find little success at my minimum power of 10 watts. 20 to
> 40 seems much more reliable.
> 
> >How often do you transmit? I'm thinking of doing this on 
> >a boat...FYI
> 
> How fast is the boat moving?  300 BPS on HF has much less
> bandwidth then VHF so it's good to be careful.   Try every 20 or
> 30 minutes.
> 
> 
> >What rig are you using?
> 
> I use an Icon 726  (725 with 6 meters).   Any decent SSB rig should work just 
> fine.
> I'd hesitate to recommend something like the 5 watt 817.
> 
> On APRS trick for HF.   While you shouldn't use it on a regular basis, if
> there's a time when it's critical to get a packet out.  Use a path of ECHO
> much like we use RELAY on VHF.  All HF APRS stations should digipeat
> an ECHO packet.
> 
> 
> >Steve N0FPF
> 
> Hope that helps...
> 
> Bill