[OZAPRS] SatGate around VK7?

Sat Dec 9 10:24:53 AEDT 2017

Thank you 

Ordered

Have MiniKits AMPS

Have you even daisy chained amps ?

Andrew 

From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Mark Jessop
Sent: Saturday, 9 December 2017 9:23 AM
To: Australian APRS Users <ozaprs at aprs.net.au>
Subject: Re: [OZAPRS] SatGate around VK7?

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 <mailto: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 <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 <mailto: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 <mailto:vk4tec at tech-software.net> > wrote:

Josh

Try this

Telnet rotate.aprs.net <http://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 <mailto: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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