yeah from that abstract, that makes sense.
Alan, I'll send you a bunch of predictions for each hour from Sydney is
it or the Gong ?
g
On 31/01/2019 6:36 AM, Alan Beard wrote:
*Hi Glen and all,*
*You wrote:*
*
*
*
> 20m wont cover the whole country.... you'll need about 5
frequencies, at least 2 simulatenous at all times, maybe 3....
>
*
*
*
*And how many VHF repeaters do we have in our country, perhaps 300.*
*
*
*Thanks for the magic diagrams, it shows that if Wyalla wants to talk
to Adelaide,*
*with the equipment they have, HF only, then there is a path via a
repeater, if it were a skip distance away.*
*
*
*Does this make sense?*
*
*
*I aim to (well one is running now) start the process of giving this a
try.*
*
*
*So, I'm asking, what frequencies would you suggest?*
*
*
*The Codan to be used will do 2 to 14MHz USB or LSB. (there are more
Codans available)*
*
*
*80 (not 73, the 80 is a problem solver, have AC, need DC)*
*
*
*Alan VK2ZIW*
*
*
*
*
*On Wed, 30 Jan 2019 18:06:09 +1100, glen english wrote*
> But ALan'you dont actually need a repeater on HF... the repeater is
already up there- it's called the Ionosphere !!! :-) What would be
more useful, would be say an HF gateway onto a local repeater etc.
*> 20m wont cover the whole country.... you'll need about 5
frequencies, at least 2 simulatenous at all times, maybe 3....
> *
> 20m might get you 5% of the country for 4 hours per day right now
>
> here you go ..
> see below :
> likely coverage at 9 in the morning, a guide... there are a few
assumptions due to the variability of station/terminals.
>
> coverage at 5pm :
>
> coverage on only 20m at noon.
>
> On 30/01/2019 5:40 PM, glen english wrote:
>
So Alan
>
> didnt get a reply to my last cavity question on our separate
thread. any questions ?
>
> The MUF is about 5 MHz max right now, what are you expecting ?
>
> On 30/01/2019 5:29 PM, Alan Beard wrote:
>
Hi David, Glen and Jeroen,
>
> 10m, the RF side concerns me, the ionosphere is just not
co-operating.
>
> The MUF is not lifting up there so the coverage area isn't that good.
>
> Hence my concentrating on 20m as a max frequency. Using 20m a whole
> country can be covered. And it happens often enough, even daily
for hours.
>
> Thanks Jeroen for the networking thoughts, as Full Duplex from one
site
> on HF is realistically not possible.
>
> (I've looked at cavity designs for 100KHz split on 29MHz and you
need about
> four cubic metres!!)
>
> As mentioned, I've picked up the Codan 8528 for a Codec2 repeater.
>
> Playing some more with the Hybrid Ring:
>
http://www.unixservice.com.au/hamradio/repeaters/duplexers/hybridRing/dup6mHR.
> html
>
> Alan VK2ZIW
>
> Evil flourishes when good men do nothing.
> Consider the Christmas child.
>
---------------------------------------------------------------------------
> Alan Beard Unix Support Technician from 1984 to today
> 70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS
> Emu Heights N.S.W. 2750 Routers, terminal servers, printers,
terminals etc..
> +61 2 47353013 (h) Support Programming, shell scripting,
"C", assembler
> 0414 353013 (mobile) After uni, electronics tech
>
> _______________________________________________
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>
>
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>
Alan
Evil flourishes when good men do nothing.
Consider the Christmas child.
---------------------------------------------------------------------------
Alan Beard Unix Support Technician from 1984 to today
70 Wedmore Rd. Sun Solaris, AIX, HP/UX, Linux, SCO, MIPS
Emu Heights N.S.W. 2750 Routers, terminal servers, printers,
terminals etc..
+61 2 47353013 (h) Support Programming, shell scripting, "C",
assembler
0414 353013 (mobile) After uni, electronics tech
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