During the last week I have been monitoring the 75Bd/200 FSK transmissions (T-208 equipment) on 9044.0 Khz (CF): transmissions are on-air during daytime only, are encrypted (likely linear encryption) and appear look like "fleet broadcast" in the way of T-600 50Bd/200 FSK or NATO S-4285 (ie continuous broadcast).
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| Fig. 1 |
All TDoA results point to Smolensk area, a Russian military communications center (Figure 2).
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| Fig. 2 |
T-208 equipment is announced as QYT9 in CW op-chats, for example:
RCB de RJF94 QYT9 QSX 8573 K.
RJF94 de RCB OK QYT9 QWH 8573 K.
(RJF94 and RCB negotiate T-208 mode on 8573 Khz)