OZ7IGY, the oldest amateur radio beacon on VHF
Year 1957 The International Geophysical Year is also known to many monuments in our country. This year, for the first time on VHF 144 MHz sounded Danish lighthouse OZ7IGY (GO, International Geophysical Year). A year later, he also started broadcasting on 432 MHz. It currently covers bands from 28 Recently, a large number of VHF DX-men have been dedicated to MS operation in WSJT mode 24 GHz.
Frequencies and technical parameters of OZ7IGY
| Frequency[MHz] | Debug with USB* |
ERP [W] | ASL [m] | 99% accuracy [mHz] | Year of start of operation |
| 28,271 | 28.270.200 | 10 | 95 | 1 | 2009 |
| 40,071 | 40.070.200 | 10 | 97 | 1 | 2007 |
| 50,471 | 50.470.200 | 25 | 98 | 1 | 1990 |
| 70,021 | 70.020.200 | 25 | 100 | 1 | 2003 |
| 144,471 | 144.470.200 | 50 | 102 | 3 | 1957 |
| 432,471 | 432.470.200 | 75 | 103 | 9 | 1958 |
| 1 296,930 | 1.296.929.200 | 90 | 95 | 26 | 1978 |
| 2 400,930 | 2.400.929.200 | 30 | 98 | 46 | 1985 |
| 3 400,930 | 3.400.929.200 | 50 | 96 | 68 | 2006 |
| 5 760,930 | 5.760.929.200 | 50 | 98 | 115 | 1992 |
| 10 368,930 | 10.368.929.200 | 80 | 97 | 237 | 1999 |
| 24 048,930 | 24.048.929.200 | 20 | 97 | 481 | 2012 |
Mode and method of operation of OZ7IGY
All beacons transmit in a 60-second mixed-mode sequence (PI4 + CW + bearing) and are stabilized by GPS. It ensures that, that the transmitted frequencies are in 99 % cases more accurately than the above deviation values. PI4 (Lighthouse Fire4) is a digital mode, which can be decoded by programs like PI-RX by Poul-Erik, OZ1CKG or MSHV from Christ, LZ2HV.
OZ7IGY site
The beacons are located in the locator JO55WM54UA with altitude 85 meters. Individual antennas are 9 up to 20m high.
More on https://www.oz7igy.dk
