[OZAPRS] QRG drift HF APRS

[OE3MZC Mike]

Hi Jack,

you should try to put up your DSP-TNC as IGate in times that you do not need
it for mobile!

Vy 73 de Mike

OE3MZC

 

From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
Behalf Of Jack Chomley
Sent: Samstag, 02. Juli 2011 09:43
To: Australian APRS Users
Subject: Re: [OZAPRS] QRG drift HF APRS

 

Mmmm.....well I have NEVER gotten a position beacon through VK3MY. I just
accepted that my signals either never reached him, maybe local noise etc AND
me only running 8 watts via a Icom 703 on my motorcycle.
But I seem to have made it to many other IGATES with no problem, using my
SCS DSP Tracker TNC.

73,  Jack VK4JRC-15 HF  Motorcycle Mobile.

On Sat, Jul 2, 2011 at 4:22 PM, Ray Wells <vk2tv at exemail.com.au> wrote:

Ron,

It matters when we are a part of a global network. Are you seriously
suggesting we should abandon a global network and support a station that is
off frequency? I think not.

Can you offer a plausible reason why the "net" station won't fix his end? It
seems that everyone knows he's off frequency except the net station. The net
frequency is 10147.600 khz, not something else.

Ray vk2tv


On 02/07/11 11:50, Ron Perry wrote:

On Sat, 2011-07-02 at 08:35 +1000, Ray Wells wrote:

Mike,

A query re the figures shown at http://aprs.fi/?c=raw
<http://aprs.fi/?c=raw&call=vk6uz-4> &call=vk6uz-4

VK3MY-4 is shown with a figure of +78 which suggests he is higher in
frequency than a station shown as +50, for example.

How can this be so when VK3MY-4 is clearly displayed in a waterfall
display as being lower in frequency than almost every other station and
other contributors to this forum have made the same observation?

I know the figures are relative but that relativity suggests that, given
the number of stations shown as +50, those stations are on the correct
frequency and VK6UZ-4 is not.

I think we need to decide on a reference (net) station that is on
frequency and from that known reference, every station would be able to
use a waterfall display to net to the reference station. Those simple
steps would eliminate most of the frequency error related problems. In
fact, if one station was the standard, every other station could, by
using a waterfall display, become a pseudo sub-standard - a bit like
calibrating meters.


The Net station is the *only* one on frequency. All the others are off
frequency. It is a Net frequency.  Nothing else matters.

Ron
vk3ecv



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