Last week my FlightAware bandpass filter arrived Well after having to go to the Sorting office as customs duty had to be paid.
I made a big mistake, I bought on Ebay and it was shipped from the US, $24.99 + $12.00 Postage = £26.52 GBP, then add nearly £4.00 customs duty and £8.00 handling charge by the Royal Mall, totalling £38 pounds.
The big mistake was I found out after ordering it Icould have bought it from Amazon in the UK for £15.54 and got it a lot quicker.
Reason for purchase is I have two mobile phone masts nearby and suspected some overload of the dongles front end.
So I put it in circuit between the Antenna feed and the short SMA-M to MCX lead, OK that was Monday last week, almost immediately found a sharp drop in performance, it was left in circuit for two full days (removed last Thursday).
Taking the averages for Tue/Wed & Fri/Sat/Sun/Mon/Tue with no other changes to the system these are the figures:
Date Aircraft positions Distance nm UpTime%
Sun 8 May 16 1463 86416 158 100
Mon 9 May 16 1269 73979 140 100 fitted filter 10am
Tue 10 May 16 1040 67947 109 100
Wed 11 May 16 1023 61873 111 100
Thu 12 May 16 1446 93183 147 100 removed filter 11am
Fri 13 May 16 1532 114127 347 100
Sat 14 May 16 1337 97393 155 100
Sun 15 May 16 1496 116442 165 100
Mon 16 May 16 1580 120134 159 100
Tue 17 May 16 1579 106502 153 100
10-11 May 1031.5 64910 110 100
13-17 May 1504.8 110919.6 195.8 100
Filter/
Performance 68.55% 58.52% 56.18%
OK so I do not have a issue Mobile phone transmissions and the figures are in line with the quoted insertion loss of <2.5Db
All not lost as I intend to add an aerial Amp next 0-2000Mhz with up to 30Db gain, I may need some attenuation...
I made a big mistake, I bought on Ebay and it was shipped from the US, $24.99 + $12.00 Postage = £26.52 GBP, then add nearly £4.00 customs duty and £8.00 handling charge by the Royal Mall, totalling £38 pounds.
The big mistake was I found out after ordering it Icould have bought it from Amazon in the UK for £15.54 and got it a lot quicker.
Reason for purchase is I have two mobile phone masts nearby and suspected some overload of the dongles front end.
So I put it in circuit between the Antenna feed and the short SMA-M to MCX lead, OK that was Monday last week, almost immediately found a sharp drop in performance, it was left in circuit for two full days (removed last Thursday).
Taking the averages for Tue/Wed & Fri/Sat/Sun/Mon/Tue with no other changes to the system these are the figures:
Date Aircraft positions Distance nm UpTime%
Sun 8 May 16 1463 86416 158 100
Mon 9 May 16 1269 73979 140 100 fitted filter 10am
Tue 10 May 16 1040 67947 109 100
Wed 11 May 16 1023 61873 111 100
Thu 12 May 16 1446 93183 147 100 removed filter 11am
Fri 13 May 16 1532 114127 347 100
Sat 14 May 16 1337 97393 155 100
Sun 15 May 16 1496 116442 165 100
Mon 16 May 16 1580 120134 159 100
Tue 17 May 16 1579 106502 153 100
10-11 May 1031.5 64910 110 100
13-17 May 1504.8 110919.6 195.8 100
Filter/
Performance 68.55% 58.52% 56.18%
OK so I do not have a issue Mobile phone transmissions and the figures are in line with the quoted insertion loss of <2.5Db
All not lost as I intend to add an aerial Amp next 0-2000Mhz with up to 30Db gain, I may need some attenuation...
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