[OZAPRS] QRG drift HF APRS

[Ron Perry]

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&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