SV4FFK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: KM19

Receiver-side FT8 activity involving SV4FFK, decoded by SO8OO in southeastern Poland. 1,641 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 37 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-10-08.

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 1,641 FT8 messages attributed to SV4FFK as the transmitting token by decoded message structure across 37 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (82%), followed by 80 m (8%) and 60 m (7%). Most decodes (78%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

1,641
Messages attributed
37
UTC dates decoded
139
Active 15-min windows
-9 dB
Estimated median S/N

Bands

160m · 1,348 80m · 132 60m · 117 40m · 1 20m · 41 10m · 2
First attributed message: 2026-06-09
Last attributed message: 2026-10-08 01:42 UTC

Observed FT8 message patterns

Attributed sample
1,641 messages
Active dates
37 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-16 to 0 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 215, moderate (-15 to -9 dB) 654, strong (≥ -8 dB) 772.

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 SV4FFK 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 SV4FFK

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
KM19 · 1,390 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,164 km (approx.)
Last such locator decoded
2026-10-08 01:42 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 UTCBandSV4FFK S/NCounterpartCounterpart S/NMsgsCapture
10-08 00:49 60m -14 / -12 F1GTU -11 / -6 5 ✓ Full exchange observed
10-08 00:48 60m -14 / - OE1NAC - / -10 2 ✓ Closing fragment
10-08 00:38 160m - / -18 R5AV -6 / - 3 Partial capture
10-07 18:52 160m -18 / -19 ON4CMT -13 / -10 5 ✓ Full exchange observed
10-07 18:39 160m -13 / -14 OM3SX +14 / -5 5 Partial capture
10-07 18:37 160m - / - SP7TAC -12 / - 2 Partial capture
10-07 18:32 160m -9 / -5 SV3GKU +4 / - 3 ✓ Closing observed
10-07 18:28 160m -16 / -23 DL3RL +5 / - 3 ✓ Closing observed
10-07 01:38 80m - / - ON4MAP -10 / - 6 Partial capture
10-07 01:38 80m -12 / -4 PA3FPQ +4 / -11 5 ✓ Full exchange observed
10-07 01:36 80m -8 / -6 HF1Z +8 / -9 5 ✓ Full exchange observed
10-06 16:26 160m -16 / -20 R2SDZ -6 / -15 3 Partial capture
10-06 16:22 160m - / - DH1MFS -5 / - 5 Partial capture
10-06 16:19 160m -20 / -10 OM3WFH +8 / -18 5 ✓ Full exchange observed
10-06 16:06 160m -16 / -8 OM3SX +5 / -5 5 ✓ Full exchange observed
10-06 01:13 60m -12 / - NP3XF - / -11 2 ✓ Closing fragment
10-06 00:59 60m -12 / - VP8ON - / - 7 Partial capture
10-05 01:24 60m -9 / -12 OE9RWH -14 / -12 5 ✓ Full exchange observed
10-05 01:21 60m -10 / -12 G6PWS -5 / -7 7 ✓ Full exchange observed
10-05 01:00 60m -14 / -9 ON1JP -18 / -15 4 Partial capture
10-05 00:57 60m -11 / - 9A2TN - / -17 3 ✓ Closing fragment
10-04 16:43 160m - / -6 DM4ZUL -3 / - 3 ✓ Closing fragment
10-04 16:41 160m - / - EU1KY +14 / - 2 Partial capture
10-04 16:37 160m - / -12 DM4ZUL -2 / - 3 Partial capture
10-04 16:37 160m -15 / -5 SP5GW +13 / -13 5 ✓ Full exchange observed
10-04 02:23 160m -7 / -18 M1DST -4 / -15 7 ✓ Full exchange observed
10-04 01:41 40m - / -4 F4MXT/P +7 / - 2 ✓ Closing fragment
10-04 01:38 40m - / -12 NC3S -6 / - 3 ✓ Closing fragment
10-04 01:31 60m -9 / - 8R1TM - / - 3 Partial capture
10-03 01:02 60m -11 / - DL9KM - / -9 3 Partial capture
10-03 01:00 60m -16 / -13 DL5CK -9 / 0 5 ✓ Full exchange observed
10-03 00:57 60m -15 / - KR4IQX - / -12 2 ✓ Closing fragment
10-03 00:53 60m -13 / -4 DG4BZ -5 / -9 5 ✓ Full exchange observed
10-03 00:50 60m -12 / - KU4I - / -21 3 ✓ Closing fragment
10-03 00:49 60m -12 / -10 OH1LA -16 / -18 4 ✓ Full exchange observed
10-03 00:47 60m - / -9 EA4GRZ -9 / - 3 ✓ Closing fragment
10-03 00:30 160m - / - DL5CK -2 / - 2 Partial capture
10-03 00:25 160m +2 / -15 IK1BQD -5 / -14 5 ✓ Full exchange observed
10-02 00:44 160m +2 / -3 R3PA -10 / -18 5 ✓ Full exchange observed
10-02 00:39 160m +1 / -18 KM2P -7 / -21 13 ✓ Full exchange observed
10-02 00:26 160m -3 / -9 R8PD -21 / -21 3 ✓ Full exchange observed
10-02 00:18 160m +2 / - PP5JR - / - 4 Partial capture
10-01 23:37 80m - / - DO1OAS +4 / - 7 Partial capture
10-01 23:35 80m - / - R4FDK +4 / - 6 Partial capture
09-30 17:35 160m -16 / -3 SV9MBH -19 / +4 5 ✓ Full exchange observed
09-30 17:31 160m -12 / -17 UA6BRD -8 / - 2 ✓ Closing observed
09-30 17:29 160m - / - SP9OPL -8 / - 17 Partial capture
09-30 17:27 160m -17 / -22 SP1MGM +8 / -7 7 ✓ Full exchange observed
09-29 17:25 160m -16 / -10 YO6FNF -20 / - 3 ✓ Closing observed
09-29 17:21 160m -9 / - R6DNC - / -19 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m 
UTC    dB Audio  Message
010600  -5  999  CQ SV4FFK KM19 (x15)
60m 
UTC    dB Audio  Message
004900 -16 1029  OE1NAC SV4FFK RR73
004915 -13 1515  SV4FFK F1GTU JN05
004930 -13 1028  F1GTU SV4FFK -06
004945  -7 1515  SV4FFK F1GTU R-12
005000 -16 1028  F1GTU SV4FFK RR73
005015 -12 1515  SV4FFK F1GTU 73
005030 -15 1028  CQ SV4FFK KM19 (x9)
80m 
UTC    dB Audio  Message
013715  +9 1702  SV4FFK HF1Z R-06
013730  -8 1861  HF1Z SV4FFK RR73
013745  +9 1702  SV4FFK HF1Z 73
013800  -8 1861  CQ SV4FFK KM19
013815  +5  317  SV4FFK PA3FPQ JO32
013815  -7 1022  SV4FFK ON4MAP JO20
013830 -14 1861  PA3FPQ SV4FFK -11
013845  +5  317  SV4FFK PA3FPQ R-04
013845 -10 1022  SV4FFK ON4MAP JO20
013900 -11 1861  PA3FPQ SV4FFK RR73
013915  +3  317  SV4FFK PA3FPQ 73
013915  -8 1022  SV4FFK ON4MAP JO20 (x4)
40m 
UTC    dB Audio  Message
062500 -23 2088  CQ SV4FFK KM19                        a1
062545  -1 2313  SV4FFK IK4TVP -09 (x4)
063115 -11 2088  SV4FFK SQ6PZL JO80
063245 -11  638  SV4FFK F4MZI -10 (x4)
013815  -6  678  SV4FFK NC3S FM29 (x3)
014145  +8 1189  SV4FFK F4MXT/P -04 (x2)
20m 
UTC    dB Audio  Message
003915  -5  577  SV4FFK F1PBZ -18
003930 -21 1540  CQ SV4FFK KM19
003945  -3  577  SV4FFK F1PBZ -18
011115 -20 2125  SV4FFK 5Z4VJ KI88 (x3)
004845  -9  787  SV4FFK KC8KCM R-17 (x2)
005145 -12  872  SV4FFK KE2CJL FN13
005345 -13 2046  SV4FFK NF3R R-15
005345 -15  871  SV4FFK KE2CJL R-07
005415 -13 2046  SV4FFK NF3R 73
10m 
UTC    dB Audio  Message
074230 -16  951  CQ SV4FFK KM19                        a1 (x2)
165445  -6 2635  SV4FFK F1PBZ -13

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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