[OZAPRS] 40m gates

[Scott Evans]

Oh ok my bad! I was unaware of the alteration of the 40m band plan! I had
just recently downloaded a copy but didn't look at it closely with regards
to the digital allocated section.

So I now agree that a frequency change will be required going forward. So
the question is to our ZL neighbours, is 40m APRS still active? If so then
is there a particular frequency that is historically been used for voice
schedule that should be avoided? I've got some vague recollection that
7.045 was once used, but I don't recall exactly what for!

Maybe a new thread should be started to get discussion started...

On Wed, 16 Dec 2015, 02:50 Gerard Hill <vk2io at amsat.org> wrote:

> Interesting history on the origins of 7036 LSB for APRS. I tend to quote
> dial frequencies for the "standard" 1600/1800 Hz tones. The dial
> frequencies for the six other tone pairs in common use are available here:
> http://aprs.net.au/hf/hf-aprs-frequencies
>
> When it comes to looking for a spare slot in the band its the centre
> frequency that is of interest. This is 1700 Hz less than the dial
> frequency. Looking at the group archives, there was a lot of discussion in
> Oct 2009 about moving away from 7036 to avoid QRM. We never did move :) Now
> we'll have to.
>
> The current ZL bandplan
> <http://www.nzart.org.nz/info/technical/hf-band-usage/> has not changed
> since 2013. The segments in 40m are the same as the old VK bandplan. Its
> probably due for a review to fall in line with the latest IARU Region 3
> bandplan: http://iaru-r3.org/?dl_id=1
> In VK we should follow the VK bandplan (as released in Sep 2015). Its
> annoying to have to change frequency, but its going to happen so we might
> as well get established as soon as we can when there is more choice of
> frequencies. Liz VK2XSE, I'm in the same boat and will have to reprogram
> radios - we all will. Now to work out what the frequency should be...
>
> Cheers,
> Gerard - VK2IO
>
>
> On 14/12/2015 9:19 PM, Scott Evans wrote:
>
> The History of HF APRS on 40m stems from our friends in ZL. That was the
> frequency that suited best for their local coverage and so I just setup
> there. Now I'm not up to speed with the ZL band plan (or if there is one)
> but I do recall a problem with the use of digital modes higher up the band.
> Personally I'd prefer to stay on the frequency I'm on purely for the fact
> that it's a known frequency for use in VK/ZL
>
> back in the archives of this mailing list you will find a bit of chatter
> around 2007/2008 for reestablishing either a 40m or 20m network as an
> alternate for VK standard license class as they don't have permission to
> operate on WARC bands. After quite a bit of testing between the two bands
> it was settled that 40m was the better of the two at that time.
>
> just one thing to remember, depending on the tone pair of your HF
> TNC/Tracker most use 1600/1800Hz but some older gear (like the Pakratt
> PK-232) uses 2110/2310Hz this affects your dial frequency. The reference to
> 7.036 LSB is for 1600/1800Hz tones so your dial frequency is 7.036+/- and
> if you are using 2110/2310Hz like me, the dial frequency is 7.036510 LSB
> (2110/2310Hz)
>
> Now I'm not going to confuse this any further by quoting center
> frequencies like is done with pactor! :D
>
>
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