RT4A — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LN28

Receiver-side FT8 activity involving RT4A, decoded by SO8OO in southeastern Poland. 2,101 related FT8 messages, 1,471 CQ messages, observed on 160m, 80m, 40m, 20m, 10m, across 66 UTC dates. Heard between 2026-05-24 and 2026-08-22.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

2,101
Related messages
1,471
CQ messages
66
UTC dates heard
-10 dB
Mean decoder S/N

Bands

80m 20m 40m 10m 160m
First seen: 2026-05-24
Last seen: 2026-08-22 04:57 UTC

Frequent QSO partners observed at SO8OO

Stations RT4A worked most often, as logged from our receiver:

Activity Heatmap

Locator transmitted by RT4A

Approximate centre of LN28, decoded 2026-08-22 06:56 UTC. A transmitted locator is not proof of the operator's permanent location.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTCBandRT4A S/NCounterpartCounterpart S/NMsgsCapture
08-22 06:56 20m - / - IU7IPX -16 / - 2 Partial capture
08-22 06:54 20m - / - DG5PW -17 / - 2 Partial capture
08-22 06:48 20m -4 / - US1EA -12 / -3 4 ✓ Closing observed
08-22 06:43 20m -8 / -19 CT3MD -7 / -2 9 ✓ Full exchange observed
08-21 19:47 80m -12 / 0 UF4S/P -4 / +5 6 ✓ Full exchange observed
08-21 15:17 40m -19 / - R8CIS - / -8 2 ✓ Closing fragment
08-21 15:06 40m -21 / -5 RK3AW -17 / -4 3 ✓ Full exchange observed
08-21 15:05 40m - / - IU5VLR -17 / - 3 Partial capture
08-20 19:47 40m -4 / - R3PLN/P - / -4 5 Partial capture
08-20 19:42 40m -6 / - R3PLN/P - / -11 3 Partial capture
08-20 19:41 40m -11 / - R0QBB/3 - / +3 2 Partial capture
08-20 18:05 20m +4 / - R2DYC - / -5 2 ✓ Closing fragment
08-20 18:03 20m +6 / - DL9MY -11 / -9 3 ✓ Closing observed
08-20 17:59 20m +2 / - R6LQU - / -3 2 ✓ Closing fragment
08-20 17:53 20m +4 / - S51UN -5 / -12 3 ✓ Closing observed
08-20 17:44 20m 0 / - R3ICU - / -17 2 ✓ Closing fragment
08-20 17:34 20m -2 / - R3ICU - / -13 7 Partial capture
08-20 17:30 20m -3 / - OY1HJ - / - 7 Partial capture
08-20 03:05 20m - / -16 F1PBZ +15 / - 3 Partial capture
08-15 05:10 20m -7 / -8 RA7E/P 0 / +1 7 ✓ Full exchange observed
08-15 05:07 20m -4 / -13 UA6EU -19 / -5 3 Partial capture
08-15 05:00 20m -5 / - UA0LQE - / -13 7 Partial capture
08-12 18:10 20m -12 / - 5B4ARQ - / - 3 Partial capture
08-12 18:08 20m -11 / - S59A - / - 2 Partial capture
08-12 18:04 20m -16 / - UA0LQE - / -18 2 Partial capture
08-12 18:00 20m -13 / - OY5T - / - 3 Partial capture
08-12 17:57 20m -10 / -10 RU3QR -16 / -14 6 ✓ Full exchange observed
08-12 17:54 20m -10 / - OY5T - / - 2 Partial capture
08-12 02:28 20m - / -12 IU2VBP -5 / - 5 ✓ Closing fragment
08-11 18:30 20m -18 / - R6DJR - / -3 2 ✓ Closing fragment
08-08 18:26 160m - / - RA6ATZ -16 / - 2 Partial capture
08-08 18:21 80m -9 / - RA9FDR - / -9 2 ✓ Closing fragment
08-07 19:05 160m - / 0 R7LB -16 / - 3 Partial capture
08-07 18:56 80m -13 / - UB0SMX/P - / -11 3 ✓ Closing fragment
08-07 18:51 80m -16 / -12 YU7AS +2 / -14 6 ✓ Full exchange observed
08-07 18:48 80m -13 / -5 US1EA -10 / 0 4 ✓ Full exchange observed
08-07 18:46 80m -12 / +1 R2GFD -7 / +10 5 ✓ Full exchange observed
08-07 18:44 80m -12 / - <...> - / -4 2 Partial capture
08-07 02:32 20m - / -8 UW5ESX +2 / - 3 Partial capture
08-07 02:31 20m - / - LZ1BT -18 / - 4 Partial capture
08-07 02:23 20m - / - IU3WIX -19 / - 4 Partial capture
08-06 19:11 40m - / -4 RA6OD -8 / - 2 ✓ Closing fragment
08-06 17:05 40m - / -7 RA3ZOM -11 / - 4 ✓ Closing fragment
08-06 16:53 40m - / -1 RU3QR -20 / - 2 ✓ Closing fragment
08-06 16:24 20m - / - DG5PW -19 / - 3 Partial capture
08-06 16:17 20m - / - EA7OC +2 / - 2 Partial capture
08-06 02:53 40m - / +3 R4ML -7 / - 3 ✓ Closing fragment
08-06 02:27 40m -21 / - RD3FY - / - 2 ✓ Closing fragment
08-06 02:25 40m -20 / - 5B4ALJ - / - 2 Partial capture
08-05 19:33 80m +2 / -8 DM5KM +13 / +1 5 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

20m 
UTC    dB Audio  Message
065115  -3 1425  CQ RT4A LN28 (x6)
065400 -16 1425  RT4A DG5PW JO30
065415  -1 1425  CQ RT4A LN28
065430 -18 1425  RT4A DG5PW JO30
065445  -6 1425  CQ RT4A LN28 (x3)
065630 -15 1425  RT4A IU7IPX JN90 (x2)
065715  -8 1425  UB9USV RT4A -03
80m 
UTC    dB Audio  Message
194800  -3 1216  RT4A UF4S/P +00
194815 -14 1505  UF4S/P RT4A R+05
194830  -4 1216  RT4A UF4S/P RR73
194845 -12 1506  UF4S/P RT4A 73
194945  -7 1505  CQ RT4A LN28 (x11)
40m 
UTC    dB Audio  Message
194930  -5 2093  R3PLN/P RT4A R-04
150530 -18 1534  RT4A IU5VLR JN53
150600 -17 1153  RT4A RK3AW -05
150600 -18 1534  RT4A IU5VLR JN53
150615 -21 1344  RK3AW RT4A R-04
150630 -17 1152  RT4A RK3AW RR73
150630 -16 1534  RT4A IU5VLR JN53
150915 -22 1345  CQ RT4A LN28 (x6)
151715 -20 1345  R8CIS RT4A R-08 (x2)
160m 
UTC    dB Audio  Message
184545 -18 1028  RT4A R7LB LN17 (x4)
182600 -17 1899  RT4A RA6ATZ KN96 (x2)
10m 
UTC    dB Audio  Message
125130 -14 1233  RT4A R2BRD R-14 (x2)
101945 -24 1561  RT4A RC7KH R+01
062700 -17 1631  RT4A RG6OR KN88 (x4)
063730 -10  469  RT4A RJ6ON RR73
150730  -9 2002  RT4A RN6MA -17 (x3)
104745  -3  924  RT4A IU1TKT JN35 (x4)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.