AirNav Systems Forum
AirNav RadarBox and RadarBox24.com => AirNav RadarBox and RadarBox24.com Discussion => Topic started by: knight01 on November 06, 2009, 06:06:27 PM
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In the last few days I have noticed a substantial reduction in "my flights" count and reception. The antenna I'm using is in the loft. I live only few miles from Heathrow.
With the loft antenna, before this problem started I was getting between 180 - 230 flights in "My fights". But now I get below 110 flights at all times. That's up to 50% reduction. Right now its at 80, at around this time I used to get 190+.
I attached the supplied antenna again and I only get about 40 flights. Again that's over 50% reduction. Before with the supplied antenna, sitting on a windows sill, I was getting between 75 - 110 flights.
This just started happening from last week. I've only had the radarbox since August and its was working fine (I was getting 180+ flights in "my flights") until last week.
I didn't take notice at first, but it's getting worse on a daily basis.
I have contacted support, waiting for their reply.
Anyone know what could be wrong, while I wait for their reply.
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Hows the weather?? ;-)
Weather can have a negative influence, especially with an inside antenna.
Have you installed the SBS1 Lite meter, so you can really compare the myflights??
GL
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Tropospheric conditions have been very poor lately; for well over a week in fact. Some days have been shown as "unstable" and, together with some curtains of rain, reception has been well down. No sign of an early improvement either.
After the excellent conditions that we enjoyed in september and october, it's back to earth with a bump. Either that or both of us have box problems - which I doubt.
Mind you it's still worth checking out connections etc just in case.
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Thanks for the monthly met report. But there is almost no dependance of the 1090 reception on weather- except for ducting that enhances the range behind the horizon and is mostly associated with high pressure systems. 1090 is not tropospheric but line of sight. sic.
A degradation of reception as described indicates a faulty device or external interference.
But not weather.
Another option: change in Mode-S interrogation coverage, e.g. radar head maintenance. This would only affect flights that do not show position, though..
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Surely, for those in the northern hemisphere, it is because we are into the winter schedule, with all airlines operating fewer flights and so the numbers drop automatically. I suspect come the last weekend in March the numbers will then go up and we will see postings about the increase in numbers.
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Funnily enough, yesterday I had one of my highest aircraft counts, over 500. I normally average 200-300. Maybe all the aircraft are flying north for the winter!!
Seriously though, knight01, have you checked your polar diagram. A faulty Radarbox normally has a very reduce range. So, reset the polar diagram, and see what maximum range you're getting.
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Well there goes my theory. I have noticed more transatlantic flights heading north today, instead of coming across South Wales and the South West.
Tarbat, any significant difference in aircraft types and airlines in the increased numbers?
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With an antenna in the loft sure weather has impact on SHF,
even with an outside antenna!
A wet roof will reduce the signals received!!
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Thanks for the monthly met report. But there is almost no dependance of the 1090 reception on weather- except for ducting that enhances the range behind the horizon and is mostly associated with high pressure systems. 1090 is not tropospheric but line of sight. sic.
A degradation of reception as described indicates a faulty device or external interference.
But not weather.
I bow to your superior knowledge.
All I can say is my own observations show that the distance at which signals are detected varies considerably on a daily basis, these signals being sent by known flights observed at similar times, at similar heights and on similar courses. Something must be responsible for this and others on the forum have pointed to this: http://www.dxinfocentre.com/tropo_eur.html
As for rain, I was under the impression that a curtain of water sufficient to totally block signals to my three satellite dishes would also reduce the range and quantity of flights shown on my RB. - anecdotal only.
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As a comment:
Every HF and especially the signal above 1GHz are very sensitive to the amount of water in the atmosphere. During periods of heavy rain and thick clouds the High Frequency signals where refracted and absorbed by the millions of the small water drops. But also different temperature layers -or to be more precisely the transition between them- can bow and diffract the HF signals. As a result the range and of course the number of received aircraft can decrease significantly in this "nice" November weather.
I got the best results last winter in the period of clear blue sky with constantly low temperatures across whole europe.
Let's hope for better weather conditions...
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Thanks for the monthly met report. But there is almost no dependance of the 1090 reception on weather- except for ducting//
Maybe Palmar is living in some nice always sunny place, lucky him
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Thanks for all the info. I got a reply back from support and they've asked me to send it to W&S. This is what they have said:
"You can return to Hardware to the following address below and we will get a replacement to you once we have received it".
I'll try some of the suggestions before sending it.
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FYI my count is a bit low today as well. In the past 10 mins I have had 4 a/c on and this is rather low even for a Saturday evening!
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It is a bit quiet tonight.
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I got the best results last winter in the period of clear blue sky with constantly low temperatures across whole europe.
You are mixing things up here. This is called "ducting" and is a totally different phenomena during high pressure. The standard 1090 path is line of sight up to 180 NM around and it is not affected by low clouds. Very heavy rain storms maybe. You can't compare this to satellite reception. Lowest signals at the edge of line of sight range are maybe -95 or -100 dbm, while satellites are much below that (-130 and less).
And no, I am not living in a sunny spot, but usually low clouds and drizzle, and I have a constant 180 to 200 NM range (antenna inside the loft). Never had any change. But I own the other product.
As suggested, better use the rangeplotter to come to a precise assessment.
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Funnily enough, yesterday I had one of my highest aircraft counts, over 500. I normally average 200-300. Maybe all the aircraft are flying north for the winter!!
Tarbat, you should check the daily NAT tracks.
http://jetvision.de/nattracks.shtml (Firefox required)
Traffic over Scotland is heavy when the jetstream blows straight from the west towards you. Then westbound flights choose to circumnav over Iceland and eastbound flights follow the wind.
Most of the flights to the US East Coast go with the tracks. West coast goes across Scotland anyhow.
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More or less business as usual over here in Germany...
(http://i192.photobucket.com/albums/z157/neroon79/Airnav%20RADAR%20Box/AirNavRadarBox2009-308BetaShotat200.gif)
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Just as a FYI we did reply to the customer who started the topic.
Usually front end failures of the RB means that the RB is almost deaf so a 50% drop would mean a failure of those components are not likely. Anyhow we have asked him to check all other details again (antenna, connections) if that doesn't help he will send it back to us and we will run some checks and replace it if needed.
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I tried the suggestions and didn't see any improvement. I sent my Radarbox back to W&S about a week ago (01 Dec.). What is the turn around time? How long does it normally take?
TIA
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We seem to have got a pair of parallel threads here, both indicating the same problem or at least describing very similar symptoms.
http://www.airnavsystems.com/forum/index.php?topic=3913.0
Strange...........
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Well I have enjoyed unusually good reception on my RB today, in fact, the best reception since I purchased it several weeks ago so maybe 'atmospherics' does play a part in reception quality? (high pressure today??)
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High pressure building - just wish I had a box to enjoy it!
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Hi Bratters, sent mine back to W&S Mon 30/11, delivered Tues 01/12 (Royal Mail Special Delivery - old Registered), returned to me yesterday Tues 08/12. Engineers comments "front end saw filter replaced tested all working ok", ran it up tonight, works, but doesn't seem as sensitive as it was before it died. Mine is a few below 10150 Serial No. (Nov. '08) which I thought were supposed to be bullet-proof..................?
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Hi Jon - I've had front end saw filter problem in the past but this is somewhat different. Numbers and distance don't drop to a bare minimum as with saw problem but go down to about 50% of normal - much as others have described.
Strange that this new (new to me anyway) problem should suddenly arise. Someone suggested software but wouldn't have thought that was possible.
My box No 104xx - which means nothing to me - and currently with W&S. I wait impatiently!
Would it be helpful if W&S contributed the occasional wise and reassuring word on the forum?
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Have a read of:
http://www.airnavsystems.com/forum/index.php?topic=2759.0
W&S are usually quick, usually a turn around within a few days to a week. Though this does depend on parts being ready and any bank holidays.
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AirNav Support,
Thanks for that.
Although W&S were very quick with the turn around, I noticed a slight rattle from the RB, so took the liberty of removing the 4 front screws and removed face plate and the pcb to make sure nothing was loose or floating around to cause damage.
I have to say that I'm not at all impressed with the quality and appearance of the repair. Very messy soldering and melted flux left on the pcb - rather amateurish, and surely with smd components, W&S should have the technical facilities to replace components as the original equipment. The rattle was the lid of the screen can, which has been badly deformed (during its removal and replacement of the failed components I assume) and the lid is so loose it moves and rattles. There is now a resistor soldered across the antenna input socket, I assume, to form a leak/route to ground, but is this causing the apparent loss of sensitivity? I will take some photos and post here, if that is of assistance. Should the paper label on the pcb match the Serial No.?, just wondering if some-else's board has been stuck in my Box?
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I asked for a replacement unit when I sent it, as I've only had it since August 09. But I don't mind if it gets repaired, I just hope it doesn't come back in that condition or worse. If it does, I won't be very happy paying for RM Special delivery to send it back again.
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All this talk of RadarBoxes getting 'replaced' is IMHO a bit of a red herring.
W&S in my experience rarely replace the box but usually prefer to repair it.
As mine was only two weeks old when it failed initially I would not accept having it repaired as I felt it should be replaced.
I even took in a copy of the email from AirNav where they stated it would be replaced but that was not good enough for W&S who still wanted to repair it.
It took all of my powers of persuasion, the threat of asking for a refund and the Floor Manager disappearing out back or upstairs to talk to 'God' before they reluctantly agreed to replace it.
http://www.airnavsystems.com/forum/index.php?topic=2793.msg24700#msg24700
Since then I have had a further 'repair' but to be honest I never opened the box to take a look...maybe I should have done as these are the same clowns that fitted a PL259 to one end of the Westflex 103 cable I bought at the outset after all...
Would be interested in seeing a picture of your repair Jon?
I would hazard a guess and deduce from the amount of boxes having suffered this problem and the quick turn-around time for repairs that W&S have a stash of 'pre-repaired' boards ready to go - it would not make much economic sense if they didn't IMHO.
Regards,
-=Glyn=-
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Not complaining here just asking a question as I still think the RB is the best thing to happen to my hobby. I still think I am seeing a reduction in numbers of aircraft recorded by my box.I have attached a former pre 3.13beta polar diagram and one running since 3.12.09 when 3.13beta was released.. I run my box 24/7 so the new diiagram has had a reasonable chance to build.
I am off work this weekend and jusrt checked now, since midnight I have recorded 305 aircraft. Certainly before this I would be at leat a 100 aircraft more than this. At the end of a day OK I accept weather conditions etc might be the cause different routes etc etc but it does seem that others have noted a difference?
Is it releated to fixing the "spikes", was or is it even possible, that to stop the spikes some level of sensitivity has been changed?
Anyhow I have reset the polar diagram now to see what it is like under 2010 3.13 .
John
PS keeping a watch now for Airforce 1 etc.
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My box now back from W&S who as before were both efficient and effective.
I would of course be happier if the box were somewhat more reliable I but certainly can't complain about the after-sales service. I'm sure Airnav are pushing hard for even better build quality and stability.
Certainly the brilliant v3.13 software is worthy of the best box you can get.
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I got my box back about a week ago and the engineers comments were "dry joints on saw filter, resoldered".
I upgraded to v3.13 and reset the polar diagram.
The first screenshot (taken 03 Nov. 09) shows the polar diagram before I noticed the drop in flights.
The second screenshot (taken 19 Dec. 09) shows the latest polar diagram. This diagram has been building for about a week.
As can be seen the reception area has reduced, could this be related to the reduction in flights. I'm now only getting around 60-75 flights. When I reported the problem and stated earlier in the thread, I was getting around 100-110 flights, when I purchased the box in Aug. 09 I was getting 180+ flights.
I think the box may be defective (i.e. saw filter), and its gradually getting worse.
As Canonjohns40D said in a earlier post, has the sensitivity been reduced in the new software. I don't really want to send it back to W&S second time, as it costs £6 postage and I have a feeling nothing will be done.
This is a great product and its true when people say its addictive.
What are my options, do I wait and see what happens or do I send it back again and hope it gets fixed.
I've e-mailed support and await their reply.
Thanks
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Hi
i did wonder about sensitivity but never really got an answer. If the spikes disappered then how was it achieved??
Here is my polar diagram reset 11 December it is very good coverage i think. see 1st polar diagram.
However pre 3.13beta and 2010 3.13 i had the polar diagram out to and beyond both the inner and outer white dotted max range lines. see second polar diagram
Again not a complaint just interested to note that there does appear to be a reduction in range and number of aircraft some users are getting.
John
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I had similar problems to those being discussed here. I bought a RB earlier this year and it lost sensitivity suddenly one day. I was seeing 1,200 to 1,300 aircraft per day and then it just dropped to 400 per day. Customer service told me to return it but when I went to UPS they told me it would cost me $120 in shipping to the UK (wish they had US support facility). I purchased another RB in the mean time and the number of aircraft shot back up to the previous numbers of 1,200+ per day.
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The difficulty here is that there is no "standard" performance to measure a box against. You get what you get and you try for improvements by changing position or aerial or whatever, but you have no way of knowing whether your actual box is working properly or not.
I get 1500 flights a day; you get 600 flights a day but who can say whether it's location, aerial or box?
When things go pear-shaped and the box needs repair then subsequently you might identify any improvement or deterioration. Obviously Airnav know how many - or more likely how few boxes are subject to repair but nobody knows how many boxes are out there working below par - and with owners in total ignorance of anything wrong.
Bit of a conundrum this one.
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The difficulty here is that there is no "standard" performance to measure a box against. You get what you get and you try for improvements by changing position or aerial or whatever, but you have no way of knowing whether your actual box is working properly or not.
I get 1500 flights a day; you get 600 flights a day but who can say whether it's location, aerial or box?
When things go pear-shaped and the box needs repair then subsequently you might identify any improvement or deterioration. Obviously Airnav know how many - or more likely how few boxes are subject to repair but nobody knows how many boxes are out there working below par - and with owners in total ignorance of anything wrong.
Bit of a conundrum this one.
Don't forget to add the natural reduction in flight schedules from the summer to the winter season.
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Hi
i did wonder about sensitivity but never really got an answer. If the spikes disappered then how was it achieved??
Here is my polar diagram reset 11 December it is very good coverage i think. see 1st polar diagram.
However pre 3.13beta and 2010 3.13 i had the polar diagram out to and beyond both the inner and outer white dotted max range lines. see second polar diagram
Again not a complaint just interested to note that there does appear to be a reduction in range and number of aircraft some users are getting.
John
Hi I reset my polar diagram a week ago and just noticed today mid afternoon a single spike. (Screenshot included) This is much further than any other points on the diagram. However it is in an area and distance I was achieving before 2010-3.13.
Just wondering if it is a change in weather etc conditions or a freak one off spike??
John
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I occasionally get a single spike John. Got one at present from a week or two ago which runs for about 280nm bearing app.175 degrees from EGXN - Newton - and petering out near LFRM - Le Mans.
It's in a favoured direction for me so I would put it down to a very high altitude flight. Unfortunately didn't notice anythng until too late to look into it in more detail.
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Hi
i did wonder about sensitivity but never really got an answer. If the spikes disappered then how was it achieved??
Just wondering if it is a change in weather etc conditions or a freak one off spike??
John
I have also some spikes to the West, England East Coast, a further direction which is very low on distance; never seen a plane "inside"the spike area.
To the south I've seen a lot of planes in Switzerland, but since about 6 weeks don't see any activity overthere.
Don't know if it has to do with lower air activity, less dx possibilities on SHF freq. or???
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they said the same to me its been away nearly 3 weeks now
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I experienced the same as many others, reduced range and reduced number of flights. Sent the Radarbox back 3 weeks ago and am still waiting for it to come back. I still think it is strange that so many of us experienced similar symptoms around the time of 3.13 installation. Maybe just a coincidence or not? Have been lost without the box over the extended holiday period!
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RB V3.13 did correct an error that was introduced with some beta versions where the Polar Diagram produced a diagram that included some of the Network tracks and appeared to almost doubled the 'range' of hits. If you had used any of the beta versions, you might have though that this was normal and the corrected version 3.13 may have given the perception that range had decreased?
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Purely coincidental KevinB. Version 3.13 has no affect on the firmware of the hardware and hence would have no affect on it.
There have been some parts which we have been short of and the holiday period has also meant a few delays. Once things open up fully next week you should have your Box back as soon as possible.
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I was comparing the 3.13 polar diagram with that I'd obtained from the original 2009 disc version when I purchased the RadarBox last March. I must have only noticed it when I installed 3.13 and reset the polar diagram. I also noticed that at about the same time I stopped receiving US Military transmissions on the GAPLI-GITUS-MAM route which is what really alerted me to the reduced range. As AirNav Support have said it must just be coincidence. I will have to remain patient and wait for my box to come back. Strange how addictive this hobby becomes!
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Hello AirNav Support,
Is there anybody there?
My RB came back from W&S under ticket no. 61599 first week of December, died again 22/12, got home Tuesday 29/12 and re-checked RB - still U/S on another standard antenna - neither of which have been used outside - no chance of external/weather static discharge.
I've requested a Returns Ticket no. now 3 times - Tuesday, Wednesday evenings and again last night - nothing heard from you yet.
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Jon - why not send it direct to W&S?
Enclose copy of your "proof of purchase" receipt, copy of the last repair note and brief explanation of what's up with it. Post guaranteed delivery by lunchtime tomorrow @c£5 in a good Jiffy bag and I'll bet it's back within 5 working days.
Happy New Year mate and better luck to both of us with reliability.
John
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Hi John, thanks for that, I thought it could only be sent back to W&S under warranty, with a Ticket No. from AN. I'm getting more and more disappointed with the RB reliability (this issue needs to be tackled, and resolved properly and permanently) and AN, which is a great shame as I've always supported them.
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CoastGuardJon,
We have replied to your tickets every time within a few hours. Please check your spam settings, I am sure as you know we are not a company to ignore tickets.
We also asked you to read the FAQ section about static, as that could be whats causing you issues.
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CoastGuardJon,
We have replied to your tickets every time within a few hours. Please check your spam settings, I am sure as you know we are not a company to ignore tickets.
We also asked you to read the FAQ section about static, as that could be whats causing you issues.
Hi AN Support,
I've still not had anything back from you - I've not got any spam settings set (and believe me, I know it - best part of 150 spams per day offering me little blue tablets for my ED!!!) my email is as recorded on this site (I'm getting alerts by email of postings to this topic OK) <[email protected]> . Yes, I've read the FAQ on static, several times. This latest die off occurred using your own standard antenna inside my cousin's house. As has been said on here before, there is a problem with these SAW filters in the front end and you really do need to get it sorted - this must be costing AN an awful lot of money in warranty repair costs, labour and postage and I, like other customers, am getting rather fed up and disillusioned with your product. Having a laptop sat on my lap with the antenna balanced on the window sill - static FAQ - what more can I do, wire myself to the earth pin of the psu plug?
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Jon - this is the way I see it
the box is "relatively" new and, as with all products, weaknesses will only appear as more units are sold and more time elapses. It takes a while for a manufacturer to identify consistently failing parts. These parts then have to be re-designed and re-built, both for new boxes and as replacements.
The "static" problem however is a different issue. Airnav were and remain brilliant at producing software for decoding and plotting. But the RX being used in the old days was of course scanners by Uniden, Realistic, AOR, ICOM et al - professional tried and tested stuff for enthusiasts.
When Airnav introduced their own new single frequency receiver - Radarbox - it was a revolution in lightweight compact design which could be quietly tucked away on a shelf with its dinky little aerial placed on the bedroom window sill. A really nice attractive low-key piece of indoor kit however....... in the hands of a serious radio amateur determined to squeeze the last ounce of performance out of everything, radarbox was always going to get the full treatment. Someone used to rigging up and tweaking an HF set-up capable of picking up the faintest radio signals from halfway round the world is not going to be satisfied with a baby antenna perched on a window sill - no siree!
So here I think we may have a clash of product vis a vis customer. It's human nature to get the most out of a piece of equipment and while the box may have been built to a somewhat "limited" spec. usage-wise, the enthusiast was always going to "make the rivets pop".
I fancy next generation boxes - if there are to be any - will have to take into account the many guys who like to push the envelope.
Having said all of that, my own failures, like yours, have not been supplied aerial outside induced either.
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Hi John, this latest failure was with a brand new bog standard ANRB antenna supplied by W&S for £23, laptop, me and twig all indoors, nothing being pushed, squeezed, over-stressed (apart from me!) or subjected to any other RF. The envelope certainly hasn't been pushed, nor has the RB been subjected to a pre-amp. bog standard RB with bog standard antenna.
Hi AN Support, still not had anything from you - just checked email again, can you PM me Ticket No. please.
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CoastGuardJon,
Let us first confirm we did send all the emails, there has been no problem with emails our side but we will PM to you again. We also ask you to have some patience as your orginal was posted at 5.30 and then hour later your saying again you haven't had anything from us.
Regarding the issues you have had. Firstly we do apologise for the issues you have had but they are rare and are not as you are suggesting as major fault affecting everyone. We have explained the SAW issue in detail in the FAQ and the warranty details and there isn't much point of us repeating it again.
Finally we would like to remind you, that our presence here and quick action shows we are helping our customers and working through issues. Do try to be patient and you will be up and running again in no time.
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Hi AirNav Support,
Thanks for the PM, although I note there's no Ticket no. in it or the attached email. I first mailed you using your web-site contact facility, Tuesday, then again Wednesday, and again last night.
I have had NO emails from you. I do NOT have any spam restrictions or settings on my Lineone email account, and was surprised at the lack of reply.
Do I need a ticket no. to return my box for replacement? It will be winging its way back to W&S tomorrow.
At no time have I said this is a "major fault affecting everyone", but for those affected it is very annoying, and does seem to be more of a problem than you're willing to admit!
Anyway, there's no hard feelings on my side, and there's nothing to be gained by arguing with you in public.
Many thanks for the PM and offer therein, I'll take you up on that when my Box is back, up and running again!
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CoastGuardJon,
We have pmed you the ticket id. Did you get a ticket id auto response when you emailed us? If not that shows there is email trouble your end as we have your emails in our systems and we did reply.
Its not a a big issue, if it was we would have many more customers complaining. Our openness with our customers means we have the FAQ and have extended our warranty for that particular issue. The return percentage is still vastly below what manufactures would call a problem and ask for a replacement.
The only reason why it appear on this forum often is that we all know bad news travels faster. We still have 100s of customers to that one who posts saying its gone for a return.
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Thanks AN for the Ticket No.. No, I had no replies automated or otherwise, but interesting to know you got my emails! ;>}
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I experienced the same as many others, reduced range and reduced number of flights. Sent the Radarbox back 3 weeks ago and am still waiting for it to come back. I still think it is strange that so many of us experienced similar symptoms around the time of 3.13 installation. Maybe just a coincidence or not? Have been lost without the box over the extended holiday period!
RadarBox just arrived back after 5 weeks!! Accompanying note says the front end saw filter was replaced. Eager to see if I get the range I previously had before the problem although probably not a good time to try it out with reduced traffic due to the weather. Anyway, at least it's back.
Kevin
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Mine also arrived back today with a note saying board replaced, will try to get upa and running tomorrow, with Win 7 64-bit. Once again, a very speedy turnaround by W&S. Where are you Kevin?
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Mine also arrived back today with a note saying board replaced, will try to get upa and running tomorrow, with Win 7 64-bit. Once again, a very speedy turnaround by W&S. Where are you Kevin?
I am on the South Coast about 5 miles NE of Portsmouth. Have to say I'm not seeing much difference on RadarBox after the repair but am only 10 hours in. I'll need to give it a several days to let the polar diagram build up.
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Hi Kevin, I was expecting you to be in some foreign and distant place - 5 weeks with W&S sounds exceptional and unusual - did they have a problem with parts or something. If you're still not getting much traffic, I'd suggest you need to have a close look at your antenna and connections, sounds as though something's not right somewhere along the line.
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Hi all, back on the line with 200+ (240 @ 1927) nm, thanks AN for getting my Box sorted again - hopefully with the new board, it'll now be OK!
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Hi Kevin, I was expecting you to be in some foreign and distant place - 5 weeks with W&S sounds exceptional and unusual - did they have a problem with parts or something. If you're still not getting much traffic, I'd suggest you need to have a close look at your antenna and connections, sounds as though something's not right somewhere along the line.
Jon - think it was a combination of returning via the dealer where I bought it, Xmas and the bad weather delaying delivery. Polar diagram is slowly building out but not as far as before yet. Probably a combination of weather and time of year. When the weather is better I will get the ladder out and check the aerial & fixings thoroughly though.
Kevin
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Hi all,Irish ATC taking strike action this afternoon between 1400-1800GMT.Aer Lingus & Ryanair are cancelling a number of flights because of this,so expect a drop in the normal number of flights plotting on your box,bear this in mind,& dont think that your box is faulty.Have put a post also in the Aviation section of the forum.
Regards Paul
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Hi all and ANSupport, since getting my RB back from W&S with a "new board fitted" - fantastic performance, consistently getting A/C from 245nm (about 285miles out to nw, w and sw and about 200/210nm n and s, limited to about 35-40 to ne,e, se because of roof gable, all with standard antenna.
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Brilliant numbers John. Where exactly have you placed the twig and what's the lie of the land round your house?
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Hi John, on top of attic/dormer flat roof. We're on the top of 200' cliffs on west side of The Lizard. To the west - Atlantic Ocean, OS map ref. is SW668180.
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Ah. Thanks for that which explains a lot. I was feeling quite inadequate for a moment.
Speaking as one whose house is about 10' ABS I can only live in your shadow. On the other hand I fancy there are a heck of a lot more flights in this neck of the woods so it all balances out.
Incidentally like you my box fitted with "new board" and combined with new RB standard twig has been delivering the goods. Never been more satisfied.
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Hi John, I think I've just successfully added a screen-shot showing polar diagram, but will copy it here........? Our gable roof runs north to south and about 7' east and above the flat roof, if that makes any sense? I think I've got the screen shot sussed out now, just Plane Plotter to sort out now, can't even get beyond Calibrate Map screen (even with Tom's tips and links)!!!
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Impressive range but a heck of a lot of sea which is a shame.
Mine is loft mounted with gable ends at 30 & 210 degrees, dead areas on the polar diagram. I'm very lucky that by chance the house being slighty off-centre north/south, the favoured direction for reception is literally a centre-to-centre line from the south coast to scotland.
You have to say that for such a miniscule set up (both aerial and box) with absolutely no add-ons , we get remarkable results.
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Both very impressive, for out of the box systems, yours especially if antenna is mounted in the loft, what would it be outside and a couple of feet higher.........?
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Both very impressive, for out of the box systems, yours especially if antenna is mounted in the loft, what would it be outside and a couple of feet higher.........?
Broken probably :)
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... and another board knackered by static!
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... and another board knackered by static!
just curious...
Reading several times about the static problem, i'm curious what's the casing made of is it a plastic or metal case..
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Hi klm, metal definitely, at a guess, anodised extruded aluminium, but hey, I'm no metallurgist!
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ok tought it was plastic and maybe be the cause of static build up
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The static issue is explained at:
http://www.airnavsystems.com/forum/index.php?topic=2759.0
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ok read that and i know how to prevent statics but also know that some plastics can generate static, that's why asked where the casing was made off.
Now i know.... 8)