E75C — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Bosnia-Herzegovina Most frequent locator attributed to this token: JN93

Receiver-side FT8 activity involving E75C, decoded by SO8OO in southeastern Poland. 4,124 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 79 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-09-12.

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 4,124 FT8 messages attributed to E75C as the transmitting token by decoded message structure across 79 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (65%), followed by 80 m (21%) and 40 m (9%). The busiest six-hour window was 19:00-01:00 UTC, containing 46% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

4,124

Messages attributed

UTC dates decoded

361

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 848 60m · 191 40m · 377 20m · 2,670 10m · 38

First attributed message: 2026-06-09
Last attributed message: 2026-09-12 02:59 UTC

Observed FT8 message patterns

Attributed sample: 4,124 messages
Active dates: 79 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -19 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 914, moderate (-15 to -9 dB) 1,123, strong (≥ -8 dB) 2,087.

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 E75C in decoded directed-looking exchanges:

IW5ALZ · Italy ×7 CT2GQA · Portugal ×4 BG4OOO · China ×4 UR5WCS · Ukraine ×4 F1PBZ · France ×3 F1IQH · France ×3 K4YT · United States ×3 DL1UDO · Fed. Rep. of Germany ×3 ON4MAP · Belgium ×3 LZ1BT · Bulgaria ×3 M8KKH · England ×3 VE3DZ · Canada ×3

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 E75C

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: JN93 · 2,156 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 747 km (approx.)
Last such locator decoded: 2026-09-12 02:59 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 UTC	Band	E75C S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 02:58	80m	+4 / -	US5EAA	- / -3	2	✓ Closing fragment
09-12 02:54	80m	+4 / -	EA3RO	- / -20	4	Partial capture
09-12 02:51	80m	+12 / -	DA6OOM	-22 / -18	4	✓ Closing observed
09-12 02:50	80m	- / -	UB3ADO/P	-14 / -	2	Partial capture
09-12 02:45	80m	+6 / -	DO5PY	- / -13	6	✓ Closing fragment
09-12 02:44	80m	+8 / -1	EA3HMM	-14 / 0	5	✓ Full exchange observed
09-12 02:43	80m	+6 / -4	R2EN	-1 / -3	4	✓ Full exchange observed
09-12 02:42	80m	+7 / +9	SP5EXA	+13 / +4	5	✓ Full exchange observed
09-12 01:44	40m	- / -9	EP2AES	-8 / -	3	Partial capture
09-11 20:53	80m	- / -9	DL8ARJ	-9 / -	3	✓ Closing fragment
09-11 20:52	80m	-4 / -	IU1DXU	-10 / -5	2	✓ Closing observed
09-11 20:50	80m	-2 / -12	HF5A	+5 / -8	5	✓ Full exchange observed
09-11 20:48	80m	-5 / -10	OK1AWC	-7 / -3	7	✓ Full exchange observed
09-11 20:45	80m	+2 / -14	R2PT	-12 / -9	3	✓ Full exchange observed
09-11 20:43	80m	-5 / -	OK1AWC	+1 / -2	2	Partial capture
09-11 20:42	80m	-4 / -	YU4FQN	- / -15	2	✓ Closing fragment
09-11 20:38	80m	+4 / -	DL2MED	- / -14	3	✓ Closing fragment
09-11 20:33	80m	+2 / +7	SP9MRP	+14 / -8	5	✓ Full exchange observed
09-11 20:33	80m	+3 / -	OM5AWE	+3 / -14	5	✓ Closing observed
09-11 20:28	80m	+6 / -14	RA3WPF	+4 / -8	5	✓ Full exchange observed
09-11 20:22	80m	+4 / 0	RO2X	+8 / -	4	✓ Closing observed
09-11 20:21	80m	+6 / -12	R3VE	-4 / -11	4	✓ Full exchange observed
09-11 20:17	80m	+4 / -17	JA0LFV	-20 / -20	4	✓ Full exchange observed
09-11 20:16	80m	+2 / -24	JA9BFN	-23 / -15	6	✓ Full exchange observed
09-11 20:14	80m	+3 / -	EA5IT	-24 / -19	3	✓ Closing observed
09-11 20:12	80m	0 / -	IU8PML	- / -11	2	✓ Closing fragment
09-11 20:11	80m	-2 / -5	OE5ABL	0 / -7	4	✓ Full exchange observed
09-11 20:08	80m	+2 / -8	DD7EE	+1 / -9	5	✓ Full exchange observed
09-11 20:04	80m	+5 / -	UT1XU	- / -16	7	Partial capture
09-11 20:03	80m	+4 / -	F4FRC	-12 / -	2	✓ Closing observed
09-11 20:01	80m	- / +8	YU7AS	+4 / -	5	✓ Closing fragment
09-11 20:00	80m	+4 / -	RX4SA	- / -16	2	✓ Closing fragment
09-11 20:00	80m	+1 / -	OM1AGE	-4 / -15	5	Partial capture
09-11 19:58	80m	+7 / -	OH4KRN	-6 / -26	3	✓ Closing observed
09-11 19:54	80m	+4 / -12	OH4KRN	-6 / -13	4	Partial capture
09-11 19:53	80m	- / -13	SQ9DKS	+10 / -	4	✓ Closing fragment
09-11 19:50	40m	+2 / -	OK1GK	-3 / -	2	✓ Closing observed
09-11 19:45	40m	-4 / -	EC3A	- / -12	2	✓ Closing fragment
09-11 19:36	60m	-18 / -11	OH8JP	+8 / -1	4	✓ Full exchange observed
09-11 19:30	60m	-18 / -12	SP6EFY	+2 / -1	5	✓ Full exchange observed
09-11 19:28	60m	-16 / -9	LY8O	+6 / -2	5	✓ Full exchange observed
09-11 19:24	60m	-21 / -3	DL5RDP	+5 / +2	7	✓ Full exchange observed
09-11 19:24	60m	-19 / -19	PI4TX	-7 / -12	6	✓ Full exchange observed
09-11 16:01	40m	- / +4	IU3WON	-2 / -	3	✓ Closing fragment
09-11 15:56	40m	- / -	PA3BMB	-3 / -	2	✓ Closing fragment
09-11 15:55	40m	-3 / -	EA2AWS	- / -20	2	✓ Closing fragment
09-11 15:51	40m	-3 / -8	DD7EE	+1 / -1	6	✓ Full exchange observed
09-11 15:50	40m	+2 / -6	DJ7XB	+5 / -3	7	✓ Full exchange observed
09-11 15:45	40m	-6 / +3	PA7ZZ	+2 / -1	4	✓ Full exchange observed
09-11 15:43	40m	-10 / -	PD2MAC	- / -14	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
025115  +9 1687  DA6OOM E75C -18 (x2)
025200 -19 1627  E75C DA6OOM 73
025345 +13 1687  CQ E75C JN93 (x2)
025445 +11 1687  EA3RO E75C -20 (x4)
025645  -2 1687  CQ E75C JN93 (x3)
025815  +1 1687  US5EAA E75C -03 (x2)
025915  +8 1686  CQ E75C JN93

40m

UTC    dB Audio  Message
155745  -2  999  E75C PA3BMB 73
155930  -1  999  CQ E75C JN93                          a1
160115  -1  998  E75C IU3WON JN55 (x3)
160230  -4  999  CQ E75C JN93
194545  -3 1474  EC3A E75C R-12 (x2)
194915  -1 2135  CQ E75C JN93                          a1 (x2)
195030  -3 2234  E75C OK1GK RR73
195045  +2 2135  OK1GK E75C 73
014400  -9 2092  E75C EP2AES R-09 (x3)

60m

UTC    dB Audio  Message
193045 -20 1454  SP6EFY E75C RR73
193100  +1 1454  E75C SP6EFY 73
193115 -17 1454  CQ E75C JN93 (x3)
193245 -17 1455  IK7TOE E75C -11
193345 -19 1454  CQ E75C JN93 (x4)
193645 -20 1454  OH8JP E75C -01
193700  +7 1294  E75C OH8JP R-11
193715 -15 1454  OH8JP E75C RR73
193730  +8 1294  E75C OH8JP 73
193745 -15 1454  CQ E75C JN93

160m

UTC    dB Audio  Message
192100  +5 1760  E75C UX7QV KN29 (x7)

10m

UTC    dB Audio  Message
081645  -7 2233  E75C DK8ZZ 73
082915 -11  502  E75C DD5LT R-03 (x2)
070915 -16 1545  CQ E75C JN93 (x2)
071015 -11 1543  R6NA E75C -05 (x2)
071115  -7 1542  CQ E75C JN93 (x4)
071345 -17 1540  R3YBG E75C 73 (x3)
071715 -10 1538  CQ E75C JN93

20m

UTC    dB Audio  Message
211545  -5 1105  E75C M9SDD IO83 (x3)
055115 -17 2104  E75C EP2AES LM55 (x2)
140745  +2 2180  E75C M3OCC JO02 (x3)
141515 -13  394  E75C TA2WSE KM59 (x6)
143330 -23 2179  CQ E75C JN93                          a1

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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