YT3MD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Serbia Most frequent locator attributed to this token: KN04

Receiver-side FT8 activity involving YT3MD, decoded by SO8OO in southeastern Poland. 685 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 50 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-21.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 685 FT8 messages attributed to YT3MD as the transmitting token by decoded message structure across 50 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (71%), followed by 20 m (27%) and 10 m (2%). Most decodes (67%) fell within the six-hour window 03:00-09:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

685
Messages attributed
50
UTC dates decoded
139
Active 15-min windows
-11 dB
Estimated median S/N

Bands

80m · 1 40m · 485 20m · 187 10m · 12
First attributed message: 2026-06-10
Last attributed message: 2026-09-21 05:12 UTC

Observed FT8 message patterns

Attributed sample
685 messages
Active dates
50 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-18.1 to +1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 152, moderate (-15 to -9 dB) 260, strong (≥ -8 dB) 273.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with YT3MD in decoded directed-looking exchanges:

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to YT3MD

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator
KN04 · 261 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
608 km (approx.)
Last such locator decoded
2026-09-21 05:12 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

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 UTCBandYT3MD S/NCounterpartCounterpart S/NMsgsCapture
09-21 05:14 40m - / -11 UR9QQ +1 / - 3 ✓ Closing fragment
09-21 05:08 40m -9 / - EB3JT - / -6 2 Partial capture
09-21 05:05 40m -3 / - WB2EQE - / -9 2 Partial capture
09-21 05:03 40m -6 / -11 KE4EB -5 / -5 6 ✓ Full exchange observed
09-18 05:01 40m -15 / - EA3AKY - / -1 2 Partial capture
09-18 04:55 40m -10 / -2 R6LE -1 / +7 3 ✓ Full exchange observed
09-18 04:39 40m - / - PD1HBL -9 / - 2 ✓ Closing fragment
09-17 06:06 40m -16 / -8 US2UM +5 / - 3 ✓ Closing observed
09-17 06:02 40m - / +2 YO4FJK -1 / - 3 ✓ Closing fragment
09-17 05:58 40m -6 / -6 DG1KDD +10 / -1 5 ✓ Full exchange observed
09-17 05:46 40m -7 / - EA1HFI - / -20 11 Partial capture
09-17 05:46 40m - / - HA5KN -2 / - 6 Partial capture
09-17 05:29 40m -14 / - EA5PS - / -9 2 Partial capture
09-17 05:27 40m -14 / -1 DM3XD -16 / -21 4 ✓ Full exchange observed
09-15 05:29 40m -11 / -2 R3KJF -13 / -11 7 ✓ Full exchange observed
09-15 05:21 40m -9 / - GI4OGS -8 / -15 3 Partial capture
09-15 05:21 40m -7 / - RN2F -14 / -23 13 Partial capture
09-15 05:20 40m - / - DK5UP +8 / - 5 Partial capture
09-15 05:20 40m -10 / - RQ6B -10 / -5 4 Partial capture
09-15 05:14 40m -7 / - F5ILV - / -8 4 Partial capture
09-15 05:14 40m - / - DK5UP 0 / - 3 Partial capture
09-15 05:10 40m - / - DL6REX -4 / - 2 ✓ Closing fragment
09-15 04:56 40m -10 / - LY2EW - / -19 3 Partial capture
09-14 06:13 40m +3 / - OE5YCP - / -21 6 Partial capture
09-14 06:12 40m +4 / -7 UF2F +8 / -15 4 ✓ Full exchange observed
09-14 06:10 40m -2 / - HB9HRR -20 / -12 4 Partial capture
09-14 06:08 40m +2 / - EA7GUL - / -13 4 Partial capture
09-14 06:05 40m -1 / +6 RC6D -22 / -13 4 ✓ Full exchange observed
09-14 06:03 40m -1 / - TA4SSK - / -17 2 Partial capture
09-14 06:01 40m -5 / - SQ6FHT - / -25 3 Partial capture
09-14 06:00 40m +4 / -6 DL9RBV -3 / -14 7 ✓ Full exchange observed
09-14 05:42 40m +2 / - SP6DOL - / -14 2 ✓ Closing fragment
09-14 05:41 40m +2 / - F5ILV - / -9 2 Partial capture
09-14 05:40 40m 0 / -9 UR5ZGY +10 / -3 3 ✓ Full exchange observed
09-11 10:54 40m -9 / - S51PV - / -9 3 Partial capture
09-11 10:54 40m - / - IK4TVP -22 / - 5 Partial capture
09-11 10:54 40m - / - OK3MB -14 / - 2 Partial capture
09-09 15:01 40m -8 / +5 OE3UKW +12 / +4 4 ✓ Full exchange observed
09-09 14:39 40m -8 / -1 OE8PIT -7 / -11 5 ✓ Full exchange observed
09-08 05:21 40m - / - YT2VVV -14 / - 2 Partial capture
09-08 05:16 40m -12 / - IT9VCE - / +6 3 ✓ Closing fragment
09-08 05:13 40m -10 / - IZ4AIF - / - 2 Partial capture
09-08 05:09 40m -17 / -11 PR2AN -9 / - 4 Partial capture
09-08 05:08 40m -15 / - 4X1UF -19 / - 2 ✓ Closing observed
09-08 05:05 40m - / -2 DL3MIB -12 / - 4 ✓ Closing fragment
09-08 04:41 40m -14 / -14 YO4SX -13 / -8 6 ✓ Full exchange observed
09-08 04:38 40m -13 / - DK7UY - / -14 3 Partial capture
09-08 04:33 40m -11 / -18 RZ3BP -12 / -11 13 ✓ Full exchange observed
09-07 05:16 40m -6 / - IW2IDB - / -15 6 Partial capture
09-07 05:07 40m +11 / -8 DM2AL -11 / - 4 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
050415  -5 1715  KE4EB YT3MD RRR (x2)
050500  -4 1717  YT3MD KE4EB R-11
050515  -4 1715  WB2EQE YT3MD -09
050530  -6 1717  YT3MD KE4EB RR73
050545  -2 1715  WB2EQE YT3MD -09
050615  -2 1715  CQ YT3MD KN04                         a1 (x3)
050845  -7 1715  EB3JT YT3MD -06 (x2)
051245  +2 2546  N0BUZ YT3MD KN04
051400  +1 2583  YT3MD UR9QQ KN77 (x3)
80m 
UTC    dB Audio  Message
143745  -2 3001  CQ YT3MD KN04
20m 
UTC    dB Audio  Message
052015  -6 1862  YT3MD F6BTP 73
052345  -2 1661  YT3MD RV6F LN14
052445 -24 1316  YT3MD LA1SNA 73
052545 -12 1661  YT3MD RV6F R-16 (x2)
052745  -3  603  YT3MD RA6OD KN97 (x3)
060030 -13 1656  YT3MD TA4SSK KM57 (x2)
064415  -5  357  RI1FJL YT3MD KN04
141400 -11 1617  YT3MD CT1BFP IM59 (x3)
143000  +7 1705  YT3MD EA3HKA RR73
10m 
UTC    dB Audio  Message
110700 -15 2130  YT3MD EA6YK -05 (x2)
123415 -16 1290  CQ DX YT3MD KN04
123545 -17 1290  SP6RW YT3MD RRR
115615 -22 1770  YT3MD IK1MJK R-15
120100 -18 1965  YT3MD F5RRS JN36
120115  +1 2314  YT3MD DC2SK JN49
120130 -18 1965  YT3MD F5RRS R-19
120145  -4 2314  YT3MD DC2SK JN49
124445  -5 2821  YT3MD PA3BMB JO22 (x2)
133345  -9 2643  YT3MD F1PBZ -02 (x2)
123130 -16 1603  YT3MD R6LE LN07 (x2)

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

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