[OZAPRS] SatGate around VK7?

Sat Dec 9 20:19:57 AEDT 2017

Cool 

Can’t wait

Sent from my iPhone

> On 9 Dec 2017, at 5:40 pm, Mark Jessop <lenniethelemming at gmail.com> wrote:
> 
> No, the way the mounting system works they *have* to be on separate vertical masts, or use a cross-arm. 
> 
> They're also easily light enough to go on a standard 'j-pole' mount, like in this picture: 
> https://network.satnogs.org/media/ground_stations/IMG_20170813_155902.jpg
> 
> Or you can get a bit more creative with risers and such:
> https://network.satnogs.org/media/ground_stations/IMG_20170730_155128.jpg
> 
> - Mark
> 
>> On Sat, Dec 9, 2017 at 5:20 PM, Andrew Rich <vk4tec at tech-software.net> wrote:
>> So is it best to keep them on the same pole ? Or rework them ?
>> 
>> Andrew
>> 
>> Sent from my iPhone
>> 
>>> On 9 Dec 2017, at 9:22 am, Mark Jessop <lenniethelemming at gmail.com> wrote:
>>> 
>> 
>>> No, they are mashed together into one stick.
>>> (Yes, they are separate, he just sells them as a kit).
>>> 
>>> I use those turnstiles plus a MiniKits preamp on my SatNOGS stations. As mentioned previously, my only gripe with them is the possibly narrower-than-necessary antenna pattern. The SatNOGS guys in Greece are getting a few of them tested in a chamber for pattern & achieved gain, so it will be interesting to see what the pattern actually is. 
>>> 
>>> Apparently it is possible to widen the pattern by moving the reflectors back further, though I'm not sure exactly what distance should be used (they are currently at 1/4 wavelength). Time to break out NEC I suppose. 
>>> 
>>> 73
>>> Mark VK5QI
>>> 
>>> 
>>> 
>>> 
>>> 
>>>> On Sat, Dec 9, 2017 at 9:08 AM, <vk4tec at tech-software.net> wrote:
>>>> Mark that ebay, its it two separate antennae ? 
>>>> 
>>>>  
>>>> 
>>>> 144 and 440 MHz Turnstiles
>>>> 
>>>>  
>>>> 
>>>> Andrew
>>>> 
>>>>  
>>>> 
>>>> From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Mark Jessop
>>>> Sent: Saturday, 9 December 2017 8:57 AM
>>>> To: Australian APRS Users <ozaprs at aprs.net.au>
>>>> Subject: Re: [OZAPRS] SatGate around VK7?
>>>> 
>>>>  
>>>> 
>>>> Unless you apply some serious weatherproofing, an arrow antenna is probably not a good idea for a long-term outdoor install. Keep the arrow antenna for portable ops and either build or buy something else to go on the rotator. 
>>>> 
>>>>  
>>>> 
>>>> I've been using a turnstile for my 2m SatNOGS ground station (also a SatGate) for a while, and that works just fine for APRS from the ISS. It doesn't perform amazingly well below 20 degrees elevation, but it's definitely usable. 
>>>> 
>>>> The turnstile I'm using is from eBay: https://www.ebay.com.au/itm/Set-of-2-antennas-turnstile-crossed-dipole-RHCP-2m-and-70cm-N-connector/292347719120?hash=item4411482dd0:g:Ry0AAOSw8gVYBd1P
>>>> 
>>>>  
>>>> 
>>>> My only gripe with it is the spacing of the elements could have been a bit larger, for a more hemispherical pattern. As it is, it has a bit of an upwards lobe, hence the degraded performance at low elevation angles. 
>>>> 
>>>>  
>>>> 
>>>> I thought you built a turnstile - why not use that for the SatGate, i'm sure it would perform just fine. Maybe put a filtered preamp on it to eke out a bit more performance.
>>>> 
>>>>  
>>>> 
>>>> 73
>>>> 
>>>> Mark VK5QI
>>>> 
>>>>  
>>>> 
>>>>  
>>>> 
>>>>  
>>>> 
>>>> On Sat, Dec 9, 2017 at 6:03 AM, Andrew Rich <vk4tec at tech-software.net> wrote:
>>>> 
>>>> Josh
>>>> 
>>>> Try this
>>>> 
>>>> Telnet rotate.aprs.net 14580
>>>> User password
>>>> #filter p/RS0ISS
>>>> 
>>>> Than watch
>>>> 
>>>> I just sold my vertical
>>>> 
>>>> Arrow will go up on a rotator
>>>> 
>>>> I have beaten my head against a brick wall trying to get vk4 going
>>>> 
>>>> Andrew
>>>> 
>>>> Sent from my iPhone
>>>> 
>>>> 
>>>> > On 8 Dec 2017, at 9:28 pm, Josh <vk2hff at vk2hff.ampr.org> wrote:
>>>> >
>>>> > From Sydney I often get picked up by satgates in VK3/4/5 and ZL - the
>>>> > ISS's footprint is pretty large.
>>>> > ISS is probably the only bird you'll have much luck with using just a
>>>> > HT, but you might get into NO-84 on a good pass.
>>>> >
>>>> > - Josh VK2HFF
>>>> >
>>>> >> On 8/12/2017 10:11 PM, Marcus B wrote:
>>>> >> I'm about to go on a hike through Tassie (Overland Track) in a few
>>>> >> weeks, and I've been thinking about taking my VX8 with me and attempting
>>>> >> a few posits along the way, is there anyone in earshot of the ISS
>>>> >> SatGating around there? Any other aprs sats worth giving a go?
>>>> >>
>>>> >> 73,
>>>> >> Marcus
>>>> >>
>>>> >>
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>>>>  
>>>> 
>>>> 
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>>> 
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