DVB Dongle replace Aerial.

[r_w_walker]

I purchased this item from eBay.


DVB:

http://www.ebay.co.uk/itm/201349905111?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Works very well but the long cable is untidy.

I am sure I have seen photo's of PilotAware with an aerial plugged directly into the DVB dongle.

Searched the forum and the web so far with no success.

Anybody found an aerial that I can plug in and loose the cable?

[ianfallon]

Remember the antennas need to be vertical, so that would imply the ARF antenna would be vertically out of the other side of the PAW, making quite a long unit to place such that it has a good view of the sky I think ( ? )

[neilmurg]

Do you mean ericC? http://forum.pilotaware.com/index.php/topic,12.msg3404.html#msg3404
actually this is the GPS I think

or there's trapdoor's neat stubby solution: http://forum.pilotaware.com/index.php/topic,57.0.html

and there are more long DVB-T solutions now I think. Plus, you may want the unit in a cubby hole and the aerial on the coaming, so it depends on your aircraft config as well, but I think ADS-B is normally showing a 100+nm range, which is WAY more than you need for deconfliction.

Depending on the final 869.4 solution, you may have a short dipole to locate suckered on to a window

[r_w_walker]

Thank you for the replies but  I am looking for the aerial which comes with this dongle;-

http://www.ebay.co.uk/itm/Mini-Micro-USB-DVB-T-TV-Stick-Dongle-with-Antenna-for-Android-Tablet-Smartphone-/371360535367?hash=item5676d01347:g:BK0AAOSw3ydViXuD

i.e The aerial plugs directly into the dongle. Cannot find the aerial has a separate item.

I do not want to buy another dongle, just the aerial

[Paul_Sengupta]

Do a search for "MCX antenna".

I guess you want something like this?

http://www.rfsupplier.com/960mhz1710-1880mhz-gsmumtshspa-antenna-3dbi-plug-p-2804.html

http://www.globalsources.com/gsol/I/DVB-T-antenna/p/sm/1002276459.htm#1002276459

http://www.aliexpress.com/item/890-960MHz-1710-1880MHz-GSM-UMTS-HSPA-Antenna-3dBi-MCX-Plug-ST/1925394841.html?spm=2114.031010208.3.169.kEOSp4&ws_ab_test=searchweb201556_2_79_78_77_91_80,searchweb201644_5,searchweb201560_9

[Ian Melville]

To be honest Paul the weight of those rubber ducks bouncing around in the air will trash the MCX connector in minutes, and won't do the USB socket a lot of good either.

A right angled MCX connector with a whip made from light piano wire would do the job. Loop or bead on the end so you don't poke you eye out. We don't need 100s of miles range?

[neilmurg]

Following trapdoor's neat solution I got a pigtail and stubby, stubby attaches to the case, pigtail isn't a load on the DVB-T connection
http://www.ebay.co.uk/itm/361362426353?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
pic-
http://www.ebay.co.uk/itm/380415471408?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
pic-

I haven't tested in the air yet

do say what you decide on, for the benefit of others

[EricC]

Re sited and secured with tie wraps.
Open air around 100 miles for adsb.
50 miles through a double glazed window.

[Richard]

Eric,
      If its possible for you to describe the antenna construction, Length size, Items used. This will help anyone wanting to construct an antenna. Thank You.

[the_doc]

Can people, with known good antenna setups (DVT antenna I mean) with reasonable ads-b range (100mile ?) list their antenna part, set up, dongle type and whether it gets hot?

Strikes me there is a combination out there that will achieve acceptably small aerial (those MCX types look fine), good range (circa 100 mile max), without the DVT dongle getting too hot?

(I have just ordered my parts, and hope to get experimenting in the next week or so - based around the Chester area if anyone is interested - but I have omitted the ARF unit for now until Lee has tested this further - therefore I want to try and reduce my whip aerial size down!)

[EricC]

Home made adsb aerial.

The base is a sma jack, end launcher, 6.35mm, 1.2mm PCB
RS  stock number 5265791 about £1.50 plus vat.

This attaches to the fly lead that came with the DVB-T+FM+DAB
820T2  & SDR. This runs warm not hot after many hours.

The vertical is 3/32 copper tube which slides over the center pin.
Cut off to 88mm long after soldering in place.

The radials are copper earth wire from power cable.
Cut four 100 mm long and solder to the coners of the body of the sma jack.
Cut to 88mm long after soldering in place.

This is 1/4 wave 100 miles plus on my unit.
Converted this to 1/8 wave 50 miles range from my roof.
When I use as a base station I slide a length of 5/32 tube over the vertical
return it to 88mm

I cut the legs which are made to fit tbe pcb board , there is no need to do this

A picture is worth a thousand words.

[Mig29fuk]

Dongle getting hot.
I use a short USB extension cable as in:
http://www.ebay.co.uk/itm/like/262107430236?adgroupid=13585920426&hlpht=true&hlpv=2&rlsatarget=kwd-131843280786&adtype=pla&ff3=1&lpid=122&poi=&ul_noapp=true&limghlpsr=true&ff19=0&device=c&chn=ps&campaignid=207297426&crdt=0&ff12=67&ff11=ICEP3.0.0-L&ff14=122&viphx=1&ops=true&ff13=80

It seems to have dissipated heat? Certainly Dongle Cooler.

[Ian Melville]

I've just put my money where my mouth is and tested my suggestion I made a few posts ago.

It was going to take a few weeks to get a 90 degree male MCX plug so I sacrificed a MCX pigtail that I had by cutting to 88mm long and removing the outer sheath and screen from the coax.

Testing from inside the house I get traffic approx. 20 miles to the south and approx. 12 miles to the north. There were the odd one that was invisible (but visible with supplied antenna). Window in room faces south, with unit on windowsill.

Not suggesting this is the best solution, just that it can be made very low profile, and still get adequate range.

[r_w_walker]

New aerial arrived today. The box under the unit is the packaging the aerial arrived in!

Plugged into dongle. Needs some support to stop it rotating, relieve stress on dongle. (Other than the blue tack.)

Can see traffic 50 mile South of my farm.

[Paul_Sengupta]

Maybe a big dollop of epoxy...

I have one of the larger dongles on one of mine with the UHF aerial socket, and I was thinking of getting one of these:

http://www.ebay.co.uk/itm/281087799299