SV1TUB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: KM17

Receiver-side FT8 activity involving SV1TUB, decoded by SO8OO in southeastern Poland. 70 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-07-23 and 2026-09-08.

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 70 FT8 messages attributed to SV1TUB as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (56%), followed by 40 m (30%) and 20 m (14%). Most decodes (51%) fell within the six-hour window 21:00-03:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.

Overview

70
Messages attributed
11
UTC dates decoded
17
Active 15-min windows
-17 dB
Estimated median S/N

Bands

80m · 39 40m · 21 20m · 10
First attributed message: 2026-07-23
Last attributed message: 2026-09-08 00:41 UTC

Observed FT8 message patterns

Attributed sample
70 messages
Active dates
11 UTC dates
Estimated median S/N
-17 dB
Estimated 10th-90th percentile
-24 to -10 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 41, moderate (-15 to -9 dB) 25, 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 SV1TUB 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 SV1TUB

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
KM17 · 43 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,386 km (approx.)
Last such locator decoded
2026-09-08 00:39 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 UTCBandSV1TUB S/NCounterpartCounterpart S/NMsgsCapture
09-08 04:26 80m - / -21 DK7ZT -8 / - 5 Partial capture
09-08 00:40 40m -16 / - SP9DAT - / -12 2 ✓ Closing fragment
09-08 00:33 80m - / -10 YO4NF +6 / - 2 ✓ Closing fragment
09-05 19:11 80m - / -24 UA4FKT +2 / - 4 ✓ Closing fragment
09-05 17:50 40m - / - OE8PIT +3 / - 4 Partial capture
09-05 17:49 40m -16 / - SP5AKX -6 / -8 3 Partial capture
08-30 12:30 20m -8 / - IK3/UY7LA -11 / - 3 Partial capture
08-30 12:29 20m -11 / -7 OE9GWV -1 / - 6 ✓ Closing observed
08-30 12:29 20m - / - TA4SSK -10 / - 4 Partial capture
08-30 12:29 20m - / +4 TA2CD -14 / - 2 ✓ Closing fragment
08-30 12:21 20m - / - RU3G -5 / - 3 Partial capture
08-30 12:14 20m -9 / -17 DL1AG -12 / -1 4 ✓ Full exchange observed
08-30 11:50 20m - / - R4HJN -10 / - 2 Partial capture
08-27 02:07 40m - / - F5NNN -6 / - 6 Partial capture
08-27 02:06 40m -22 / - RK4CH -24 / - 2 ✓ Closing observed
08-27 02:04 40m - / - F4BYA +2 / - 6 Partial capture
08-27 01:12 80m - / -21 9A4ZM +13 / - 3 ✓ Closing fragment
08-27 01:03 80m -22 / -9 HA7TM +15 / - 4 ✓ Closing observed
08-27 00:28 40m -15 / -3 PA3EY -8 / -5 5 ✓ Full exchange observed
08-27 00:26 40m -14 / -15 RY3F +4 / -13 4 ✓ Full exchange observed
08-26 21:49 20m - / - G0NGL -20 / - 2 Partial capture
08-26 21:33 80m - / -18 HA7TM +16 / - 5 Partial capture
08-26 21:29 40m - / -17 PC2J +4 / - 2 ✓ Closing fragment
08-26 21:25 40m - / - PC2J -4 / - 4 Partial capture
08-17 05:57 20m - / - EA3CUU -4 / - 3 Partial capture
08-01 20:43 20m - / -11 RZ4FWA -17 / - 2 ✓ Closing fragment
08-01 20:30 80m -24 / - UA4FKT +2 / +1 4 Partial capture
08-01 18:46 20m - / -10 G1LQT -12 / - 3 Partial capture
08-01 18:39 80m - / -18 SP9WAZ +12 / - 2 Partial capture
08-01 18:39 80m - / -20 UA3ZUX +11 / - 3 ✓ Closing fragment
08-01 13:21 20m - / -17 UT8SQ -20 / - 2 ✓ Closing fragment
08-01 06:21 20m - / -10 R5AV -16 / - 2 ✓ Closing fragment
07-31 03:57 20m - / -13 RA6FSV -16 / - 3 ✓ Closing fragment
07-31 03:36 20m - / - V31DL -14 / - 2 Partial capture
07-31 03:36 20m - / -6 RC9WC -24 / - 2 ✓ Closing fragment
07-31 02:15 80m - / -6 YO3OBB +15 / - 3 ✓ Closing fragment
07-30 20:55 40m - / -16 R6FX -14 / - 2 Partial capture
07-30 20:51 40m - / - R6FX -18 / - 2 Partial capture
07-30 19:07 40m - / -12 YO9HP -4 / - 2 ✓ Closing fragment
07-30 18:34 40m - / -13 R7FT -12 / - 2 ✓ Closing fragment
07-30 18:33 80m - / - SN5J +17 / - 3 Partial capture
07-30 08:17 20m - / - DL1R 0 / - 8 Partial capture
07-29 22:53 40m - / -14 F5RRS -19 / - 3 ✓ Closing fragment
07-29 22:44 80m -16 / - SV9MBH -12 / - 3 ✓ Closing observed
07-29 18:33 40m - / -17 DF3IS -10 / - 6 ✓ Closing fragment
07-29 03:42 40m - / - R2AL -20 / - 2 Partial capture
07-28 23:06 40m - / -23 RN6HK -10 / - 2 ✓ Closing fragment
07-28 23:01 80m -16 / - RN6HK +10 / +2 8 Partial capture
07-28 22:54 20m - / -10 IS0KNG -12 / - 2 ✓ Closing fragment
07-28 18:11 20m - / - PD3LKN -12 / - 10 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
011300 +12 1851  SV1TUB 9A4ZM 73
191130  -7 1915  SV1TUB UA4FKT LO23 (x4)
003300  +7 1840  SV1TUB YO4NF -10 (x2)
003515 -23 1839  CQ SV1TUB KM17 (x3)
042630  -8 1114  SV1TUB DK7ZT -21 (x5)
40m 
UTC    dB Audio  Message
020900  -4  910  SV1TUB F5NNN IN94 (x2)
174615 -21 1995  UR4QWW SV1TUB -07
174930  -4 1994  SV1TUB SP5AKX KO01
174945 -16 1995  SP5AKX SV1TUB -08
175000  -7 1994  SV1TUB SP5AKX KO01
175000  +5  341  SV1TUB OE8PIT JN66 (x4)
003645 -21 1872  CQ SV1TUB KM17 (x2)
004045 -17 1775  SP9DAT SV1TUB -12 (x2)
041200 -19 1776  SV1TUB K1JAK FN53
20m 
UTC    dB Audio  Message
122900 -16 2402  SV1TUB TA2CD R+04
122915 -11 2045  SV1TUB TA4SSK KM57
122930 -12 2402  SV1TUB TA2CD 73
122930 -10 2683  SV1TUB OE9GWV JN47
122945 -13 2045  SV1TUB TA4SSK KM57
123000  +6 2683  SV1TUB OE9GWV JN47
123000 -11 2047  <SV1TUB> IK3/UY7LA
123015 -10 2045  SV1TUB TA4SSK KM57
123030  +2 2683  SV1TUB OE9GWV JN47
123045  -5 2045  SV1TUB TA4SSK KM57
123100  -4 2683  SV1TUB OE9GWV R-07
123115 -11 2047  OE9GWV SV1TUB RR73
123130  +0 2683  SV1TUB OE9GWV 73
123145  -7 2047  IK3/UY7LA SV1TUB +18 (x2)
10m 
UTC    dB Audio  Message
064730 -19 1598  SV1TUB RW6HP LN14

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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