SM7DXE — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO86

Receiver-side FT8 activity involving SM7DXE, decoded by SO8OO in southeastern Poland. 789 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 41 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-09-16.

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 789 FT8 messages attributed to SM7DXE as the transmitting token by decoded message structure across 41 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (89%), followed by 20 m (11%) and 10 m (0%). Most decodes (84%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12.3 dB.

Overview

789

Messages attributed

UTC dates decoded

113

Active 15-min windows

-12.3 dB

Estimated median S/N

Bands

40m · 702 20m · 86 10m · 1

First attributed message: 2026-06-14
Last attributed message: 2026-09-16 05:55 UTC

Observed FT8 message patterns

Attributed sample: 789 messages
Active dates: 41 UTC dates
Estimated median S/N: -12.3 dB
Estimated 10th-90th percentile: -19 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 235, moderate (-15 to -9 dB) 374, strong (≥ -8 dB) 180.

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 SM7DXE in decoded directed-looking exchanges:

OK5AG/P · Czech Republic ×2 G1CEC · England ×2 R2FDU · Kaliningrad ×2 UT4PA · Ukraine ×2 VK6BAD · Australia ×2 YO4LUP · Romania ×2 EA3HRE · Spain G3AKA · England GW5PH · Wales JR3NZC · Japan KF0YOB · United States T22TT · Tuvalu

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 SM7DXE

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: JO86 · 463 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 796 km (approx.)
Last such locator decoded: 2026-09-16 04:14 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	SM7DXE S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 05:53	40m	0 / -1	IK6DLK	-2 / -1	5	✓ Full exchange observed
09-16 05:52	40m	-2 / -	CT3IQ	- / -8	2	✓ Closing fragment
09-16 04:19	40m	-7 / -	RI1FJZ	- / -19	4	Partial capture
09-16 04:17	40m	-9 / -	IK4TVP	-14 / -13	3	Partial capture
09-16 04:14	40m	-11 / -	DL/AD2LX	- / -13	2	Partial capture
09-16 04:12	40m	-2 / -	TJ1GD	- / -	3	Partial capture
09-16 04:06	40m	-6 / -	UT5MB	-19 / -6	3	✓ Closing observed
09-16 04:04	40m	-10 / -	6Y5HN	- / -19	5	✓ Closing fragment
09-16 04:00	40m	-13 / -	RI1FJZ	- / -	3	Partial capture
09-07 05:23	40m	0 / -	HI3RRR	- / -12	6	✓ Closing fragment
09-07 05:19	40m	+1 / -	ZL1OGX	- / -19	5	Partial capture
09-07 05:16	40m	+1 / -	J38DX	- / -9	7	✓ Closing fragment
09-06 21:20	40m	+6 / -	VP2MAA	- / -12	10	✓ Closing fragment
09-06 21:14	40m	+7 / -	VK6DW	- / -8	2	✓ Closing fragment
09-06 21:09	40m	+5 / -	VP2MAA	- / -	9	Partial capture
09-05 22:24	40m	+5 / -	LU9GDN	- / -	2	Partial capture
09-05 22:16	40m	+6 / -	EB5FMC	- / -12	2	✓ Closing fragment
09-05 22:14	40m	+4 / -	VK6BAD	- / -15	5	✓ Closing fragment
09-05 22:12	40m	+4 / 0	UR9QQ	+1 / -	4	✓ Closing observed
09-05 22:10	40m	+6 / -	DG9FEH	0 / -	3	✓ Closing observed
09-05 22:07	40m	+4 / -8	LZ2VQ	-4 / -3	5	✓ Full exchange observed
09-05 22:07	40m	+4 / -	VE9TG	- / -14	2	✓ Closing fragment
08-29 17:11	40m	+2 / -1	UA4FEN	-4 / 0	4	✓ Full exchange observed
08-29 17:06	40m	-3 / -	ZL2NU	- / -16	9	✓ Closing fragment
08-26 21:19	40m	+1 / -	VK3GYH	- / -12	3	✓ Closing fragment
08-26 17:27	40m	-2 / -	ZL1VAH	- / -17	4	✓ Closing fragment
08-23 21:07	20m	- / -12	JR3NZC	-7 / -	3	✓ Closing fragment
08-23 20:12	40m	+5 / +10	DH1PS	+13 / +1	4	✓ Full exchange observed
08-23 20:10	40m	+6 / +2	RY3F	-2 / -	3	✓ Closing observed
08-23 20:09	40m	+4 / -	VK2NN	- / -16	2	✓ Closing fragment
08-18 20:36	40m	-16 / -	IK3/UY7LA	- / -	2	Partial capture
08-18 20:14	40m	-18 / -	<...>	- / -	8	Partial capture
08-18 20:10	40m	-18 / -	R2EA/P	- / -	5	Partial capture
08-17 21:04	40m	-13 / -	ZS6KBS	- / -18	3	✓ Closing fragment
08-11 06:24	40m	-22 / -	OA4ENG	- / -	2	Partial capture
08-10 21:07	40m	-13 / -	SV1DKR	- / -6	2	✓ Closing fragment
08-10 21:05	40m	-12 / -	S57AJ	- / -8	3	✓ Closing fragment
08-10 21:00	40m	-12 / -	DS5USH	- / -	7	Partial capture
08-10 20:44	40m	-9 / -	SP3JHZ	- / -6	2	✓ Closing fragment
08-10 20:39	40m	-12 / -	HL2ADO	- / -16	7	✓ Closing fragment
08-10 20:37	40m	-13 / -6	EA3EDU	-11 / -9	4	✓ Full exchange observed
08-10 20:36	40m	-12 / -	G1CEC	- / -3	2	✓ Closing fragment
08-10 20:34	40m	-12 / -	HL3LMS	- / -16	4	Partial capture
08-10 20:21	40m	-11 / -	9H1FL	- / -	3	Partial capture
08-10 20:02	40m	-14 / -14	S56LKP	-18 / -	6	✓ Closing observed
08-10 19:46	40m	-13 / -	EA9AR	- / -16	5	✓ Closing fragment
08-10 19:43	40m	-14 / +6	S55B	-6 / +1	6	✓ Full exchange observed
08-10 19:41	40m	-12 / -	S56TNT	- / -	2	Partial capture
08-10 19:39	40m	-15 / -	IU5HIU	- / -7	2	Partial capture
08-10 19:36	40m	-14 / -	S55B	- / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
041700 -14 1721  SM7DXE IK4TVP +20 (x2)
041815  -9 1374  IK4TVP SM7DXE R-13
041915 -10 1374  RI1FJZ SM7DXE R-19 (x4)
055230  -2 2215  CT3IQ SM7DXE R-08 (x2)
055315  -3  624  SM7DXE IK6DLK JN63
055330  -1 2215  IK6DLK SM7DXE -01
055345  -3  624  SM7DXE IK6DLK R-01
055400  +2 2215  IK6DLK SM7DXE RR73
055415  +0  624  SM7DXE IK6DLK 73
055500  -3 2215  R1AV SM7DXE -08

20m

UTC    dB Audio  Message
181800 -15 1676  TU5MM SM7DXE JO86 (x3)
095715 -18 1579  <...> SM7DXE JO86 (x2)
100545 -12  999  SM7DXE G3AKA -13 (x2)
100715  -9 1000  SM7DXE F4BJN JN25 (x2)
081715 -20 1528  MI0NWA SM7DXE JO86
081930 -24 1528  HG0NPJ SM7DXE JO86
210530 -17 1465  VA2PM SM7DXE JO86
210715  -9  652  SM7DXE JR3NZC PM74 (x3)

10m

UTC    dB Audio  Message
204700 -24 1876  CA3MLY SM7DXE -07
205115 -16  949  SM7DXE UR9QQ KN77

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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