CT4VB — 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: Portugal Most frequent locator attributed to this token: IM58

Receiver-side FT8 activity involving CT4VB, decoded by SO8OO in southeastern Poland. 37 FT8 messages attributed to this token as transmitter, on 80m, 40m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-08-20 and 2026-10-13.

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 37 FT8 messages attributed to CT4VB as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (89%), followed by 80 m (8%) and 10 m (3%). Several six-hour UTC windows tied for the largest share (97%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (65%); the estimated median was -17 dB.

Overview

37
Messages attributed
11
UTC dates decoded
16
Active 15-min windows
-17 dB
Estimated median S/N

Bands

80m · 3 40m · 33 10m · 1
First attributed message: 2026-08-20
Last attributed message: 2026-10-13 09:43 UTC

Observed FT8 message patterns

Attributed sample
37 messages
Active dates
11 UTC dates
Estimated median S/N
-17 dB
Estimated 10th-90th percentile
-21 to -8 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 9, strong (≥ -8 dB) 4.

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 CT4VB 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 CT4VB

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
IM58 · 22 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
2,737 km (approx.)
Last such locator decoded
2026-09-07 18:15 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 UTCBandCT4VB S/NCounterpartCounterpart S/NMsgsCapture
10-23 16:20 40m - / - PE1BSF -13 / - 2 Partial capture
10-23 16:10 40m - / +3 F4GUK -1 / - 3 ✓ Closing fragment
10-20 08:08 40m - / -12 M9XPN -15 / - 4 Partial capture
10-18 07:30 40m - / -23 DB1RLP -7 / - 2 ✓ Closing fragment
10-16 20:44 40m - / -3 EA7J -3 / - 2 ✓ Closing fragment
10-10 08:02 40m - / -12 DL6RS -4 / - 3 ✓ Closing fragment
10-07 08:03 40m - / -9 G4DBW -15 / - 2 Partial capture
10-02 15:25 40m - / - M1DBB -17 / - 3 Partial capture
09-18 06:27 40m - / -10 DH5NC -3 / - 3 ✓ Closing fragment
09-13 08:01 40m - / -23 9A4N 0 / - 3 ✓ Closing fragment
09-12 06:37 40m - / -8 HB9EFK +7 / - 2 ✓ Closing fragment
09-11 20:20 160m - / - 9A4ZM -10 / - 2 Partial capture
09-11 20:15 40m - / - F4HXJ -9 / - 2 Partial capture
09-11 20:12 40m - / +6 ON5MX -8 / - 2 ✓ Closing fragment
09-11 00:25 160m - / - SP2LLP -4 / - 5 Partial capture
09-10 07:35 40m - / -4 GW0ARK +1 / - 2 ✓ Closing fragment
09-10 07:21 40m - / - IU3IOV -14 / - 2 Partial capture
09-10 07:17 40m - / -7 ON4AOI -4 / - 2 ✓ Closing fragment
09-10 07:07 40m - / -6 F1ROA -16 / - 4 ✓ Closing fragment
09-10 06:58 40m - / - DB1TH +12 / - 2 Partial capture
09-10 06:54 40m - / - IU3IOV 0 / - 3 Partial capture
09-08 16:29 40m - / -14 DG1KFR -12 / - 3 ✓ Closing fragment
09-07 18:12 40m - / - UW5KW -3 / - 4 Partial capture
09-07 18:12 40m - / - G0NPI -10 / - 2 Partial capture
09-07 18:11 40m - / - SP9JP -2 / - 8 Partial capture
09-07 17:33 40m - / -16 E70SZ +2 / - 5 ✓ Closing fragment
09-07 06:49 40m - / -3 KS4OT -17 / - 3 ✓ Closing fragment
09-05 07:02 40m - / - DK5DW -3 / - 5 Partial capture
09-04 20:19 40m - / - UG0B -18 / - 5 Partial capture
09-04 20:13 40m - / -11 IU2FRL -5 / - 3 ✓ Closing fragment
09-04 05:45 40m - / - YO3GNF -12 / - 17 Partial capture
09-03 20:47 40m - / - OV5SP -6 / - 2 Partial capture
09-03 06:40 40m - / - DM2GG -13 / - 2 Partial capture
09-03 06:20 40m - / - DL6UM -4 / - 6 Partial capture
09-03 06:17 40m - / -2 F1TXI -18 / - 3 ✓ Closing fragment
09-03 05:40 40m - / -21 DD7EE +7 / - 4 ✓ Closing fragment
09-03 05:34 40m - / -15 K4YT -15 / - 2 ✓ Closing fragment
09-02 20:53 40m - / -11 G8WVB -13 / - 2 ✓ Closing fragment
09-02 20:53 40m - / -12 IR7MGGC -5 / - 3 Partial capture
09-02 20:51 40m -21 / -10 HB9EDG -9 / - 3 ✓ Closing observed
09-02 20:48 40m -17 / -7 F1HFP -4 / - 3 ✓ Closing observed
09-02 18:12 40m - / - DG3DAF +2 / - 2 Partial capture
09-01 20:47 40m - / -25 TA2BMV -12 / - 2 Partial capture
08-29 21:25 80m - / -11 G8BCG -8 / - 2 ✓ Closing fragment
08-28 20:31 40m - / +5 PD9HIX +2 / - 2 ✓ Closing fragment
08-28 20:24 40m - / -15 2E0LMA -4 / - 2 ✓ Closing fragment
08-28 20:18 40m - / - LY4SC -4 / - 2 Partial capture
08-28 20:17 40m - / -5 ON5LC -7 / - 3 ✓ Closing fragment
08-28 20:11 40m - / +2 ON5VKE -8 / - 2 ✓ Closing fragment
08-27 20:03 40m - / -14 M0CKX -18 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
080330  -6 2590  CT4VB DL6RS 73
204430  -2 1123  CT4VB EA7J R-03 (x2)
204600  -4 2703  CT4VB DM4GG R-02
073045  -8 2108  CT4VB DB1RLP R-23 (x2)
080800 -16 1017  CT4VB M9XPN IO91 (x4)
161045  -2 2701  CT4VB F4GUK JN18 (x3)
162045 -12 1275  CT4VB PE1BSF JO32 (x2)
10m 
UTC    dB Audio  Message
094330 -15 2391  R7KKO CT4VB 73
160m 
UTC    dB Audio  Message
002500  -2 1674  CT4VB SP2LLP JO94 (x5)
202045  -9 1621  CT4VB 9A4ZM JN86 (x2)
60m 
UTC    dB Audio  Message
174600 -11 2488  CT4VB IU3VGK JN55
80m 
UTC    dB Audio  Message
201500 -24 1491  DL1IP CT4VB -14
201515 -13  618  CT4VB DO9UWE JO42
201515  -3 1491  CT4VB DL1IP R-13
201545  -7  618  CT4VB DO9UWE JO42
201545  +1 1491  CT4VB DL1IP 73
201730 -18  984  CQ CT4VB IM58
201815  +1  382  CT4VB DO1ID JO41
201830 -18  984  DO1ID CT4VB -16
201845 +15  382  CT4VB DO1ID R-25 (x5)
212545  -9  577  CT4VB G8BCG R-11 (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.

CW

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

Explore CW reception at SO8OO

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