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oz7igyqsl-1957

OZ7IGY goes all the way back to the International Geophysical Year in 1957. From its start on 144 MHz it has been on air on more and more bands. Today OZ7IGY transmits on 28 MHz, 40 MHz, 50 MHz, 70 MHz, 144 MHz, 432 MHz, 1,3 GHz, 2,3 GHz, 3,4 GHz, 5,7 GHz, 10 GHz and 24 GHz. Most of the HF, VHF and UHF technology used by OZ7IGY was old(er) land mobile equipment modified for the purpose. For the microwave bands most of the technology is dedicated radio amateur beacon designs while power amplifiers are surplus.

Frequency [MHz] USB dial* ERP [W] Antenna direction ASL [m] GPS + PI4 Year QRV
28,271 28.270.200 10 Omni 98 Yes 2009
40,021 40.020.200 10 Omni 94 2007
50,471 50.470.200 40 Omni 100 Yes 1990
70,021 70.020.200 40 Omni 102 Yes 2003
144,471 144.470.200 40 Omni 104 Yes 1957
432,471 432.470.200 30 Omni 105 Yes 1958
1 296,930 1.296.929.200 20 Omni 96  Yes 1978
2 320,930 2.320.929.200 15 Omni 100 1985
3 400,930 3.400.929.200 25 Omni 97 2006
5 760,930 5.760.929.200 50
40
Omni
35º
99
97
1992
10 368,930 10.368.929.200 1000 35º 96 1999
24 048,930 24.048.929.200 4 Omni 98 Yes 2012
Notes: Active beacon Out of service Planned maintenance, see event log  *: On most radios

GPS + PI4 beacons use a 60 s mixed mode sequence (PI4, CW and carrier). Otherwise a ~40 s sequence is used (CW and carrier). Over time all the OZ7IGY beacons will be GPS locked and use the Next Generation Beacons platform. The PI4 signal on 24 GHz is PI4-96 otherwise PI4 is used.

Given the latest developments in digital modulation techniques and RF-circuits it was time for OZ7IGY to take advantage of these technologies. On 30 October 2012 the first two Next Generation Beacons were put on air. The Next Generation Beacons platform is open to others and the software can easily be adapted to other modulations and sequences. Furthermore, is the new platform frequency and time locked to GPS. Thus the frequency accuracy is better than 5 mHz. Emanuele, IW9GDC and beacon manager of IW9GDC/B that also uses the Next Generation Beacons platform says: “… I can really say that this hardware is actually the best ever made … 4 km straight line and cannot detect any issue with the signal.”

PI4 decoded and DX cluster spots

Next Generation Beacons – PI4