G04
| Enigma ID | G04 |
| Name | Three Note Oddity |
| Frequencies | |
| Status | Inactive |
| Voice | Female, automated (the same as G03) |
| Emission mode | AM |
| Location |
Hungary
|
| Activity pages |
G04 is generally believed to have been operated by Hungarian intelligence and transmitted from Budapest area, ceased in 2005.
| Preamble | Message | Outro | |
|---|---|---|---|
| Three long, rising, sharp telephone tones | Achtung, Achtung | 32587 32587 05458 05458 ... 32125 32125 | Ende, Ende |
| Repeated for 5 minutes | 5-figure paired groups | ||
No amount of 5-figure groups in the message was given. Up until 2000, transmitted messages were highly non-random, as it can be seen, for example, here. The messages didn't look as much non-random afterwards.
Historical schedule: First Thursday of the month at 20:05 and 20:35 UTC (summer) or 21:05 and 21:35 UTC (winter). The frequency of the first sending was random, but always within 3 - 6 MHz range, lower in European winter. The repeat was 100 kHz above the previous frequency (since 2000, lower before that).