IW7DHC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN81

Receiver-side FT8 activity involving IW7DHC, decoded by SO8OO in southeastern Poland. 476 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 13 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-20.

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 476 FT8 messages attributed to IW7DHC as the transmitting token by decoded message structure across 13 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (41%), followed by 80 m (37%) and 10 m (17%). Several six-hour UTC windows tied for the largest share (49%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -3 dB.

Overview

476
Messages attributed
13
UTC dates decoded
44
Active 15-min windows
-3 dB
Estimated median S/N

Bands

80m · 178 40m · 194 20m · 21 10m · 83
First attributed message: 2026-06-06
Last attributed message: 2026-08-20 17:25 UTC

Observed FT8 message patterns

Attributed sample
476 messages
Active dates
13 UTC dates
Estimated median S/N
-3 dB
Estimated 10th-90th percentile
-19 to +3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 99, moderate (-15 to -9 dB) 57, strong (≥ -8 dB) 320.

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 IW7DHC 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 IW7DHC

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
JN81 · 288 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,009 km (approx.)
Last such locator decoded
2026-08-20 17:24 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 UTCBandIW7DHC S/NCounterpartCounterpart S/NMsgsCapture
08-20 17:23 40m -3 / - R8LCA - / -18 3 ✓ Closing fragment
08-20 17:20 40m -2 / - CT2GQA - / -19 2 ✓ Closing fragment
08-20 17:18 40m 0 / -3 OH8KTX -13 / -16 5 ✓ Full exchange observed
08-20 17:17 40m -2 / - EA7GNO - / -13 2 ✓ Closing fragment
08-20 17:14 40m -3 / -7 RK3AW -17 / -13 5 ✓ Full exchange observed
08-20 17:12 40m +1 / - EB1ESK - / -11 3 ✓ Closing fragment
08-20 17:10 40m -7 / - IV3HOS - / -19 2 ✓ Closing fragment
08-20 17:10 40m - / - UB2FEK 0 / - 3 Partial capture
08-20 17:08 40m -6 / -13 UR5XEJ -6 / -9 4 ✓ Full exchange observed
08-20 17:05 40m -6 / - RD4AAK - / -16 2 ✓ Closing fragment
08-20 17:04 40m - / +7 PA7ZZ -5 / - 3 Partial capture
08-20 17:02 40m -2 / - E70SZ +8 / - 3 ✓ Closing observed
08-20 17:01 40m 0 / +4 DF5DY +2 / -3 9 ✓ Full exchange observed
08-20 17:00 40m 0 / -4 SQ5WBW/P -10 / -18 4 ✓ Full exchange observed
08-20 16:57 40m -2 / -11 RK4UZ -11 / -9 8 ✓ Full exchange observed
08-20 16:57 40m -1 / +6 DL4YDR -14 / -13 4 ✓ Full exchange observed
08-20 16:55 40m - / +7 HA1DSL -14 / - 2 Partial capture
08-20 16:54 40m - / - DF5DY -4 / - 2 Partial capture
08-20 16:54 40m -1 / - CT2GQA - / -16 2 Partial capture
08-20 16:51 40m 0 / - IK4LZH 0 / - 3 ✓ Closing observed
08-20 16:49 40m - / - DF5DY +2 / - 4 Partial capture
08-20 16:49 40m -2 / -7 R5AV -2 / +1 4 ✓ Full exchange observed
08-20 16:48 40m - / - F1IQH -14 / - 2 Partial capture
08-20 16:48 40m -2 / 0 DL6EL -4 / +3 5 ✓ Full exchange observed
08-20 16:48 40m - / - PE1NPS -7 / - 4 Partial capture
08-20 16:46 40m 0 / - SQ5WBW/P - / -14 2 Partial capture
08-20 14:05 10m - / - DO5WG -12 / - 2 Partial capture
08-07 05:55 40m -17 / - LB5AK - / -24 2 ✓ Closing fragment
08-07 05:53 40m -19 / - IK4LZH - / - 2 ✓ Closing fragment
08-07 05:49 40m - / +5 DK2MAX -2 / - 2 Partial capture
08-07 05:18 40m - / - IZ4AIF -16 / - 2 Partial capture
07-25 16:12 20m -19 / -12 R6AO -16 / - 3 ✓ Closing observed
07-25 16:05 20m - / -2 M7KHO -2 / - 3 ✓ Closing fragment
07-25 16:00 20m - / +2 OH3MB -18 / - 2 ✓ Closing fragment
07-25 15:55 20m - / +4 IZ5RKH -8 / - 4 ✓ Closing fragment
07-25 15:52 20m - / - DL1UDO -12 / - 3 Partial capture
07-25 15:49 20m -20 / - M7KPQ -14 / -10 4 ✓ Closing observed
07-25 15:40 20m - / -4 DG5DR -10 / - 5 ✓ Closing fragment
07-24 15:07 10m -16 / 0 DL3MIB -11 / -6 10 Partial capture
07-24 15:03 10m - / +1 DL9KM -2 / - 3 ✓ Closing fragment
07-24 14:56 10m -18 / -6 DG6TOM +5 / -2 4 ✓ Full exchange observed
07-24 14:54 10m -12 / - OZ5AGJ - / -9 2 Partial capture
07-24 14:51 10m -20 / - HA3GX - / -6 2 Partial capture
07-24 14:48 10m -18 / - PU2JRM - / -10 3 Partial capture
07-24 14:41 10m - / - DL3MIB -6 / - 7 Partial capture
07-24 14:25 10m - / - RC5F -16 / - 2 Partial capture
07-20 18:53 10m -17 / -12 M8FQT -12 / - 4 ✓ Closing observed
07-20 18:50 10m -15 / - S59MA - / - 3 Partial capture
07-20 18:49 10m -19 / 0 F4DUZ -19 / - 5 ✓ Closing observed
07-20 18:43 10m -16 / - EW2ZC - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
171830  +0 1139  OH8KTX IW7DHC -16
171845 -15 1139  IW7DHC OH8KTX R-03
171900  +1 1139  OH8KTX IW7DHC RR73
171915 -11 1139  IW7DHC OH8KTX 73
171930  -2 1139  CQ IW7DHC JN81 (x2)
172030  -1 1139  CT2GQA IW7DHC -19 (x2)
172130  -5 1139  CQ IW7DHC JN81 (x3)
172300  -2 1139  R8LCA IW7DHC -18 (x2)
172430  -6 1139  CQ IW7DHC JN81
172500  -6 1139  R8LCA IW7DHC RR73
10m 
UTC    dB Audio  Message
150700 -19 1183  CQ IW7DHC JN81
150715 -12 1125  IW7DHC DL3MIB JN57
150730 -16 1183  DL3MIB IW7DHC -06
150745 -15 1125  IW7DHC DL3MIB R+00
150800 -16 1183  DL3MIB IW7DHC -06
150815 -10 1125  IW7DHC DL3MIB R+00 (x6)
160730 -20 1182  ER3CT IW7DHC R-09
151815 -10 2646  IW7DHC F1PBZ -12
140545 -10 1196  IW7DHC DO5WG JO40 (x2)
80m 
UTC    dB Audio  Message
165330  -4 1104  CQ IW7DHC JN81
20m 
UTC    dB Audio  Message
155915  -7  463  IW7DHC IK4LZH 73
155945  -7 2643  IW7DHC PD0HLA -07
160045 -19 1176  IW7DHC OH3MB R+02 (x2)
160545  -4  805  IW7DHC M7KHO IO81 (x3)
160900 -23 1178  CQ IW7DHC JN81 (x2)
161130 -20 1177  M7OOT IW7DHC RR73
161215 -15 1176  IW7DHC R6AO KN95 (x2)
161300 -19 1177  R6AO IW7DHC RR73
161330 -19 1178  CQ IW7DHC JN81                        a1 (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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