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 on most radios||ERP [W]||Antenna direction||ASL [m]||GPS + PI4||Year QRV|
|Notes:||Active beacon||Out of service||Planned maintenance, see event log|
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.
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