[OZAPRS] Hf gates CD

[Glen English VK1XX]

base station 700-1500km away will hear you, but you wont hear a station 
50km away.


On 7/12/2017 5:57 PM, vk4tec at tech-software.net wrote:
> Go for a walk
>
> -----Original Message-----
> From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Glen English VK1XX
> Sent: Thursday, 7 December 2017 4:55 PM
> To: ozaprs at aprs.net.au
> Subject: Re: [OZAPRS] Hf gates CD
>
> tracker might well have CD but:
>
> 1) Consider that in the mobile, you wont hear any stations less than the skip distance (unless they are 10km away) . The daytime skip distance might be 700km.... so anyone inside that distance you wont hear  cause the ionosphere wont support it..it wont support any angles higher than perhaps 45 degrees.
>
> The base station though will hear lots of transmissions from lots of stations >700km  to 1500km away, so there would be significant collision chance if the position update is too often. Maybe 10 minutes might be suitable. I dunno why people run..
>
> 2) With a 5%  to 10%  efficiency mobile you wont hear too much unless the propagation is optimal...
>
>
> glen
>
>
>
>
>
> On 7/12/2017 5:41 PM, vk4tec at tech-software.net wrote:
>> Blind ?
>>
>> Tracker has CD
>>
>> -----Original Message-----
>> From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Glen English VK1XX
>> Sent: Thursday, 7 December 2017 2:46 PM
>> To: ozaprs at aprs.net.au
>> Subject: Re: [OZAPRS] Hf gates
>>
>> but how does this matter?
>>
>> You will  be transmitting on a frequency blind
>>
>> there will be receivers you cannot control
>>
>> There will be any number of propagation modes you cannot control...
>>
>>
>>
>> On 7/12/2017 3:34 PM, Andrew Rich wrote:
>>> Hi
>>>
>>> Can I get a list of hf gates on 10.147
>>>
>>> In my planning for the Xmas run
>>>
>>> Cheers
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