KR4DVQ — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM75

Receiver-side FT8 activity involving KR4DVQ, decoded by SO8OO in southeastern Poland. 20 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-06-16.

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 20 FT8 messages attributed to KR4DVQ as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -6 dB; no usual signal pattern is inferred.

Overview

20
Messages attributed
2
UTC dates decoded
4
Active 15-min windows
-6 dB
Estimated median S/N

Bands

20m · 20
First attributed message: 2026-06-08
Last attributed message: 2026-06-16 02:09 UTC

Observed FT8 message patterns

Attributed sample
20 messages
Active dates
2 UTC dates
Estimated median S/N
-6 dB
Estimated 10th-90th percentile
-15 to -2 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 15.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with KR4DVQ in decoded directed-looking exchanges:

Most frequent locator attributed to KR4DVQ

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
EM75 · 11 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,113 km (approx.)
Last such locator decoded
2026-06-16 02:09 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 UTCBandKR4DVQ S/NCounterpartCounterpart S/NMsgsCapture
10-28 02:21 40m - / -22 SV1BLD +10 / - 3 Partial capture
10-28 02:17 40m - / - SV1BLD +8 / - 2 Partial capture
10-28 02:05 40m - / -11 EA3EQS -15 / - 2 ✓ Closing fragment
10-27 01:41 40m - / -16 CT7BRV -8 / - 2 ✓ Closing fragment
10-25 01:27 40m - / - YY5EHT -17 / - 4 Partial capture
10-17 04:40 40m - / -22 Z34K -8 / - 2 Partial capture
10-03 23:21 40m - / - F5OZK -2 / - 4 Partial capture
10-03 02:45 40m - / - PA0KGB +1 / - 7 Partial capture
10-03 02:18 40m - / -5 ON3ANY +8 / - 5 ✓ Closing fragment
09-29 03:47 40m - / - IU5RPJ +12 / - 2 ✓ Closing fragment
09-29 03:41 40m - / -17 IU5RPJ +10 / - 7 ✓ Closing fragment
09-29 03:36 40m - / -12 IT9JVC -20 / - 2 ✓ Closing fragment
09-29 03:30 40m - / -14 F4EGM +6 / - 3 ✓ Closing fragment
09-29 03:25 40m - / -9 F4CQS -3 / - 4 Partial capture
09-29 03:16 40m - / -15 EA7AQY -16 / - 3 ✓ Closing fragment
09-29 03:15 40m - / - IT9JVC -15 / - 2 Partial capture
09-29 03:12 40m - / - TA2EE -10 / - 4 Partial capture
09-29 02:34 40m - / -4 F1PBZ -3 / - 3 Partial capture
09-25 03:49 40m - / -12 F5NBU -9 / - 3 ✓ Closing fragment
09-24 03:03 40m - / -15 F1DXP -10 / - 2 ✓ Closing fragment
09-24 03:01 40m - / - TA3NK -13 / - 6 Partial capture
09-23 03:01 40m - / - IW9FRA -16 / - 2 Partial capture
09-23 02:58 40m - / - UA6LIK -4 / - 4 Partial capture
09-23 02:28 40m - / -16 F4CQS -4 / - 4 Partial capture
09-11 02:50 40m - / - IW9FRA -12 / - 4 Partial capture
09-11 02:45 40m - / -3 EA3HMM -5 / - 3 ✓ Closing fragment
09-11 02:22 40m - / - MI7XHT -8 / - 2 Partial capture
09-11 02:06 40m - / - EA3HMM -7 / - 3 Partial capture
09-09 02:38 40m - / -24 IW9FRA -16 / - 9 Partial capture
09-09 02:34 40m - / -15 RA6ABC +8 / - 2 ✓ Closing fragment
09-09 02:17 40m - / -7 HK3YL -17 / - 2 ✓ Closing fragment
09-08 01:50 40m - / - IK2XDE -2 / - 2 Partial capture
09-08 01:45 40m - / -2 KS4OT +2 / - 2 Partial capture
09-07 05:05 40m - / -13 DL2MIJ 0 / - 2 ✓ Closing fragment
09-07 04:55 40m - / - DK8HC -12 / - 4 Partial capture
09-07 04:53 40m - / -7 PD1CMP -13 / - 2 ✓ Closing fragment
09-07 04:46 40m - / -12 PA2RO -8 / - 5 ✓ Closing fragment
09-07 04:45 40m - / -19 EB3JT -15 / - 8 ✓ Closing fragment
09-07 04:45 40m - / - F4BYA -7 / - 3 Partial capture
09-07 04:38 40m - / - F4BYA +7 / - 3 Partial capture
09-07 04:38 40m - / -16 IU2HUQ 0 / - 2 Partial capture
09-07 04:34 40m - / - DD1VB +2 / - 2 Partial capture
09-07 04:34 40m - / -10 IZ2QPP -7 / - 5 ✓ Closing fragment
09-07 04:33 40m - / - F4BYA +7 / - 3 Partial capture
09-06 02:15 40m - / +6 LA1QRO -10 / - 2 ✓ Closing fragment
09-01 02:41 40m - / - F1IQH +6 / - 3 Partial capture
09-01 02:36 40m - / - PC2J -5 / - 5 Partial capture
09-01 02:36 40m - / - G5TV -4 / - 2 Partial capture
09-01 02:28 40m - / - G5TV -4 / - 2 Partial capture
09-01 02:25 40m - / -16 F1PBZ +2 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
045915 -11  749  KR4DVQ PD9OH JO21
012730 -19 1556  KR4DVQ YY5EHT FK60 (x4)
014130  -7  545  KR4DVQ CT7BRV -16 (x2)
020530 -15 1880  KR4DVQ EA3EQS R-11 (x2)
021730  +3 2386  KR4DVQ SV1BLD KM17 (x6)
20m 
UTC    dB Audio  Message
012330 -14 2358  KR4DVQ OH3JF +00
013030  -9  539  KR4DVQ A93MO -16 (x5)
013700  -9 1924  KR4DVQ HB9TIH JN36 (x5)
014200 -20 1359  KR4DVQ IZ8EYN -19 (x2)
012815 -12  853  KR4DVQ DK9ZQ JO41 (x2)

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee