[aprssig] who hears my station
shortsheep at worldnet.att.net
Sat Dec 24 01:40:16 CST 2005
What we need to be telling this station is this:
1) The dial freq of his HF radio can one of many factors!
2) It depends on whether his radio *can* be set to LSB (the default for
or whether it can only set to USB, what *most* modern, lower-end radios use.
3) The dial offset for DATA is arbitrary on every radio. It depends on
mfg decided to use as a reference for the TNC, Kantronics, MFJ, AEA, etc.
They are all different, and thus, the two tones are NOT the same. My
has several different settings which can be selected to match the tones of
TNC's, all of which affect the DIAL FREQ, *NOT* the TX or RX freq!
4) Just becaue your radio is *tuned* to 10.151 doesn't mean that's where
everyone else is TX'ing! So you won't hear them. You need to figure out
you're listening, based on your rig's settings, USB/LSB, tone offset etc,
find YOUR dial freq that coincides with 10.151, FOR YOUR TNC as well.
You might be within 2kHz or so of where you need to be.
LISTEN for a bit and find the traffic - IT'S THERE!
Another problem is that since most rigs default to USB, you cannot TX
because the rig thinks your TX freq is out-of-band because of the tone
offset. A simple fix is to mod the rig (usually by cutting a diode or
to enable out-of-band-TX).
Remember that 30m isn't open all the time nowadays, so you might think
that there's no one on when it's just a matter of being off-freq by a kc or
B patient, tune around, and you'll find it. Merely pointing your dial freq
10.151 isn't the solution, few rigs tune that way, especially on data, if
even has a data mode.
----- Original Message -----
From: "Stephen H. Smith" <wa8lmf2 at aol.com>
To: "TAPR APRS Mailing List" <aprssig at lists.tapr.org>;
<wa7ixk at earthlink.net>
Sent: Friday, December 23, 2005 23:12
Subject: Re: [aprssig] who hears my station
> wa7ixk at earthlink.net wrote:
> >> "The wilds of Idaho" is exactly the kind of place that 30M HF APRS is
> >> ideally suited for. The band is open to SOMEWHERE almost 24 hours a
> >> day. It's not uncommon to get into an HF igate 500-1000 miles away
> >> depending on time of day.
> >> What is a "TXO-9"? ____________________________
> > a txo-9 is a high accurracy osc. for a yaesu radio. High accruracy .5
> > osc.
> > I have listened and have never heard any thing.
> > I am wondering if it is hearsay and no one has ever used it.
> > Just my observation.
> > It seems if i put my home station on freq I should hear a bleep once in
> > a while.
> > I have heard on people saying it is possible, but i have never heard
> > of some one actually trying it and having any success.
> > I want data.!Not hearsay.
> Well then the radio should certainly be stable enough.
> Note that many radios default to USB on the 30M band. If you follow the
> frequently-cited advice to "tune your radio to 10.151" but forget to
> switch to LSB, you'll never hear anything since you will be monitoring
> outside the band.
> It's definitely not hearsay. You can "see" what I am hearing here in
> Pasadena on 30M on my APRS UIview webserver site at:
> This is 30M as monitored by a Kenwood TS-50 and KAM TNC. The antenna is
> a 30M horizontal compact dipole made from two 30-meter "Ham Stick"
> mobile whips about 20 feet off the ground in a very noisy receive
> location blanketed with broadband crud leaking out of a cable TV trunk
> Currently we are at the rock-bottom of the 11 year solar cycle that
> affects HF propagation. At this location, the combination of low solar
> activity and the long winter nights causes the band to often be
> completely dead at night. The best times to view are early-to-mid
> morning and mid-afternoon to early evening.
> Stephen H. Smith wa8lmf (at) aol.com
> EchoLink Node: 14400 [Think bottom of the 2M band]
> Home Page: http://wa8lmf.com
> "APRS 101" Explanation of APRS Path Selection & Digipeating
> Updated APRS Symbol Chart
> New/Updated "Rev G" APRS http://webs.lanset.com/wa8lmf/aprs
> Symbols Set for UI-View,
> UIpoint and APRSplus:
> aprssig mailing list
> aprssig at lists.tapr.org
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