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AirNav RadarBox and RadarBox24.com => AirNav RadarBox and RadarBox24.com Discussion => Topic started by: Dub33 on January 25, 2008, 12:01:35 AM

Title: Dublin \ Ireland RB Reception
Post by: Dub33 on January 25, 2008, 12:01:35 AM

Hi All,

I am a new user of the RB in Dublin, Ireland.

I live quite close to Dublin Airport and I am able to pick up all departures from RWY 10 at Dublin Airport, (as soon as they leave the ground), however, I have noted that the RB signal for arrivals over Howth Head at the Ameli point are being consistently lost at Ameli.

Do I have a filter switched on, which is casuing this loss of reception on these arrivals onto rwy 28 via Ameli \ Howth head, or is it more probable that someting is blocking my line of sight to the arriving aircraft over Ameli \ Howth Head. This quite problematic for me, as circa 85% of arrivals \ departures at Dublin, use runway 10/28.

I have included a screen shot with the Polar diagram switched on and without the Polar diagram switched on, if it helps

If it is  reception problem would a Jim M-75 Preamp solve the problem? Any help is welcome..

[attachment deleted by admin]

Title: Re: Dublin \ Ireland RB Reception
Post by: AirNav Support on January 25, 2008, 10:17:43 AM

Sounds like a line of sight issue. Can you see the aircraft visually from your location when on approach?

A preamp will help but won't get round line of sight issues. A intresting calculator below which can work out the distance you can pick up aircraft depending on the height of your antenna and aircraft. (if there are no obstructions)

http://radarproblems.com/calculators/horizon.htm

Title: Re: Dublin \ Ireland RB Reception
Post by: Dub33 on January 25, 2008, 10:27:20 AM

Hi,

Unfortunately no, i can't see the arrivals on approach from Ameli \ Howth head. I think they are down to circa 900ft - 1300ft at that stage, so "line of sight" prevents it.

Thanks for the assistance.

Regds
Dub33

Title: Re: Dublin \ Ireland RB Reception
Post by: Dub33 on January 25, 2008, 10:50:52 AM

Hi,

Just an update,

Thanks a lot -- I adjusted the height & position of the antennae upwards by circa 7ft. it made a BIG difference.

Attached a polar diagram of the new reception and I can track the arrivals down to 2 miles out, at 600ft.

Dub33

[attachment deleted by admin]

Title: Re: Dublin \ Ireland RB Reception
Post by: piper-pilot on January 25, 2008, 11:05:25 AM

I suggest an outside antenna as hi as possible with a hi gain whip that will improve your close in performance as well as long range.

Regards

Title: Re: Dublin \ Ireland RB Reception
Post by: Dub33 on January 25, 2008, 01:43:45 PM

Cheers, and will do,

I'm looking into some accessories on ML& Sons Ltd

http://www.hamradio.co.uk/

Regards

Title: Re: Dublin \ Ireland RB Reception
Post by: AirNav Development on January 25, 2008, 02:11:21 PM

We will soon have on our main page a special antenna kit where users would be able to buy a all in one kit to improve their reception. Should be ready in 1 week. You may prefer to wait.

Title: Re: Dublin \ Ireland RB Reception
Post by: Dub33 on January 25, 2008, 06:04:07 PM

Hi AirNav Team,

I'll wait until then, thanks for the update.

Much appreciated

Regards

Title: Re: Dublin \ Ireland RB Reception
Post by: Dub33 on February 05, 2008, 02:44:04 PM

Hi, Air Nav Development,

Just a quick question, any update on the  special antenna kit ?

Regards