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  1. Thread: best antenna

    by Scroggie
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    3,962,351

    That is more or less the same as I am using but...

    That is more or less the same as I am using but because I have 3 receivers I am also going through a splitter which introduces a loss of about 6 db. My coax feeder is about another 6db loss so I can...
  2. Thread: best antenna

    by Scroggie
    Replies
    2,839
    Views
    3,962,351

    I struggled to get any good results from a...

    I struggled to get any good results from a cantenna and eventually went with an 8 element co-axial cable co linear. More complicated to make but not really that difficult. I eventually added a...
  3. Thread: best antenna

    by Scroggie
    Replies
    2,839
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    3,962,351

    @abcd567: I've spend today constructing...

    @abcd567:

    I've spend today constructing another coaxial co-linear - 12 elements this time.
    I found your excellent posts on the other forum detailing all the tests you did on this type of...
  4. Replies
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    18,696

    echo "36.4" > /usr/local/sbin/gain/newgain ...

    echo "36.4" > /usr/local/sbin/gain/newgain works perfectly!

    Thanks
  5. Replies
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    18,696

    I am using valid positive values and the config...

    I am using valid positive values and the config file shows that it is updating as expected. I think I need to also update a map setting but not sure how, possible something like:-

    sudo sed -n...
  6. Replies
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    18,696

    Yes here is what happens to that button 10373 ...

    Yes here is what happens to that button
    10373

    This is how it normally looks 10374
  7. Replies
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    18,696

    I did check the config file and it looked correct...

    I did check the config file and it looked correct but on the map it was showing "-36.4" (including the quotes) and no aircraft visible so I think somethings not quite right. Resetting the gain from...
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    Hi Captain I'm not trying to optimise gain,...

    Hi Captain

    I'm not trying to optimise gain, I've already done that. This was just an experiment of increasing gain overnight because there is less noise then (10dB less)

    I think crontab lines...
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    18,696

    Already got 3!! T-EGSY1 T-EGSY73 T-EGSY74

    Already got 3!! T-EGSY1 T-EGSY73 T-EGSY74
  10. Replies
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    18,696

    Yes that gain is lower than optimum. I'm in the...

    Yes that gain is lower than optimum. I'm in the middle of plotting hits and positions per aircraft over 24 hour periods.
    10336
  11. Replies
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    I suppose I might just as well switch the gains...

    I suppose I might just as well switch the gains manually for a few days to see if it's worth the effort.
    I've just about reached the best configuration possible for my location anyway with often 1.7...
  12. Replies
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    18,696

    I'm not doing this to find the optimum gain, I...

    I'm not doing this to find the optimum gain, I have already done that. First by running the optimising script and latterly by setting a new gain every 24 hours and gathering hits and positions stats....
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    18,696

    Gain changing overnight with python script and cron

    I have no experience with python but there are many out there who do so I would appreciate any help that I can get with this.
    I've seen the gain setting test script and I think part of it would help...
  14. Thread: best antenna

    by Scroggie
    Replies
    2,839
    Views
    3,962,351

    Yes - looks like it doesn't it.

    Yes - looks like it doesn't it.
  15. Thread: best antenna

    by Scroggie
    Replies
    2,839
    Views
    3,962,351

    Thanks for that. This is the amplifier I tried ...

    Thanks for that.
    This is the amplifier I tried https://www.ebay.co.uk/itm/231361695425, mainly because I was splitting the antenna feed passively to 3 different receivers so was losing another 6 dB...
  16. Thread: best antenna

    by Scroggie
    Replies
    2,839
    Views
    3,962,351

    I've spent a lot of time experimenting with...

    I've spent a lot of time experimenting with different antenna setups.
    This temporary arrangement is what I have currently:-
    10297
    Mounted immediately above the ham radio beam is a glass fibre tube...
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    Sticky: I agree but this morning I see this most unusual...

    I agree but this morning I see this most unusual effect overnight :-
    10280
    Must be due to the large high pressure currently over Western Europe:-
    10281
    My usual maximum range from Northern...
  18. This seems a bit strange too:- 10013 Over...

    This seems a bit strange too:-
    10013
    Over 30,000 aircraft in a day? The best I've seen in 24 hours has been just over a tenth of that!
  19. Another thing I find intriguing. Currently...

    Another thing I find intriguing. Currently worldwide, 717 radars have a maximum range of 349nm. not one of 350 or 351 or 353. The radio horizon to an aircraft at 45000 feet (not many are) from my...
  20. Interesting though that all the radars at the top...

    Interesting though that all the radars at the top of the list are seeing less than 5000 aircraft a day and most of us are getting in the mid 2000's to see one with entries of 37,000 aircraft per day...
  21. I too am a bit suspicious of some of the stats. I...

    I too am a bit suspicious of some of the stats. I have had my maximum range hit the magic 349 nm mark but struggle to get the average over 210. I suppose if there are large numbers of flights going...
  22. Yes agreed. I didn't mean "correct" in the...

    Yes agreed. I didn't mean "correct" in the literal sense just that the database was at last updating properly.
  23. Looks like stats have been fixed - up time has...

    Looks like stats have been fixed - up time has started to climb again and Max and Average ranges now correct, seemingly for everyone.

    T-EGSY1
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    The trouble is that these stats have brought out...

    The trouble is that these stats have brought out a competitive side of my nature that I didn't think I had!
    Not that I'll ever compete with the guy with 22 receivers, but I get a bit of a buzz out...
  25. Replies
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    I too have been logging my stats for 3 months now...

    I too have been logging my stats for 3 months now and see the same as ger241 reported back in March. My 30 day average maximum range is currently 295nm but the detailed stats data has been stuck on...
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