[OZAPRS] QRG drift HF APRS

Norm, VK3XCI vk3xci at aanet.com.au
Sat Jul 2 15:10:03 EST 2011


Unless of course if it's an *international* net. Then the primary 
*international* net station is the *only* one on frequency, and subnet should be 
within +or- 1x10^-n of the primary ( where n represents the number we all agree 
on, say -6)

:)



73 de Norm, VK3XCI
Mildura, Australia
The Wintersun City
QF15bt.

On 2/07/2011 11:50 AM, 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&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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