SM7RDT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO66

Receiver-side FT8 activity involving SM7RDT, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-08-20.

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 30 FT8 messages attributed to SM7RDT as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (70%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

20m · 30

First attributed message: 2026-06-07
Last attributed message: 2026-08-20 07:19 UTC

Observed FT8 message patterns

Attributed sample: 30 messages
Active dates: 12 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -24 to -10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 1.

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 SM7RDT in decoded directed-looking exchanges:

7Z1DV · Saudi Arabia CS8ABF · Azores DB7GE · Fed. Rep. of Germany F5RMK · France HB9SFL · Switzerland HB9TWU · Switzerland OE6HTG · Austria OE6TXW · Austria ON1DGN · Belgium ON3NR · Belgium DL1JEL · Fed. Rep. of Germany DL3MIB · Fed. Rep. of Germany

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 SM7RDT

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: JO66 · 21 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 934 km (approx.)
Last such locator decoded: 2026-08-20 07:18 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	SM7RDT S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 05:50	60m	- / -15	DH9DR	-5 / -	3	✓ Closing fragment
09-10 13:55	40m	- / -9	PD0NAH	-22 / -	2	✓ Closing fragment
09-10 12:53	40m	- / -5	DL1JEL	-2 / -	3	✓ Closing fragment
09-09 21:04	60m	- / -22	G4ATX	+5 / -	3	✓ Closing fragment
09-09 20:46	60m	- / -16	OK6AB	-22 / -	2	Partial capture
09-09 12:36	40m	- / -11	PI4DX	-8 / -	2	✓ Closing fragment
09-09 12:27	40m	- / -13	HG0NPJ	-8 / -	2	✓ Closing fragment
09-08 07:50	40m	- / -13	DL3MIB	+3 / -	9	✓ Closing fragment
09-07 13:07	40m	- / -9	OZ9FF	-3 / -	2	✓ Closing fragment
09-06 14:28	40m	- / +1	OH3CD	-12 / -	2	Partial capture
09-06 09:33	40m	- / -16	LA1QRO	-15 / -	2	Partial capture
09-06 06:56	60m	- / -19	SP2EUI	-17 / -	4	Partial capture
09-05 06:54	40m	- / -	PD0WL	-18 / -	5	Partial capture
09-04 07:08	60m	- / -4	LB8MG	-12 / -	2	✓ Closing fragment
09-04 06:49	60m	- / -	DF0AWG	-5 / -	3	Partial capture
09-01 13:09	40m	- / -16	SQ9DJQ	+7 / -	3	✓ Closing fragment
08-29 07:37	20m	- / -	SV5BYP	-13 / -	3	Partial capture
08-26 13:07	20m	- / -10	7Z1DV	-10 / -	3	✓ Closing fragment
08-25 06:06	20m	- / -8	DB7GE	-6 / -	2	✓ Closing fragment
08-20 07:17	20m	-11 / -3	OE6TXW	-7 / -	5	✓ Closing observed
08-20 07:10	20m	-9 / -	F5RMK	- / -12	4	✓ Closing fragment
08-20 06:59	20m	-15 / -	EG90GL	- / -	3	Partial capture
08-07 08:17	20m	- / -7	HB9TWU	-14 / -	2	✓ Closing fragment
07-31 07:51	20m	-21 / -	W4U	- / -	2	Partial capture
07-14 09:56	20m	- / -	G0DEL	-5 / -	3	Partial capture
07-14 09:46	20m	- / -4	DK7ZT	-22 / -	4	Partial capture
07-12 06:47	20m	-21 / -8	ON3NR	-16 / +1	4	✓ Full exchange observed
07-07 09:26	20m	- / -	DL5MK	+4 / -	4	Partial capture
07-07 08:41	20m	- / -	DM3YBN	-21 / -	3	Partial capture
06-27 06:55	20m	-21 / -	MM0JTV	- / -1	4	Partial capture
06-25 06:41	20m	- / -17	OZ9FF	-13 / -	7	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
075315  +2 1070  SM7RDT DL3MIB JN57 (x3)
122715 -10 2179  SM7RDT HG0NPJ -13 (x2)
123645  -7 1118  SM7RDT PI4DX -11 (x2)
212315 -13 1771  SM7RDT IU2HUQ -20
125345  -1 1317  SM7RDT DL1JEL JO60 (x2)
125415 -15 1176  SM7RDT DG1SCD JN58
125445  -2 1317  SM7RDT DL1JEL 73
135515 -21 1714  SM7RDT PD0NAH -09 (x2)
062515 -12 2025  SM7RDT DG4YT JO31

60m

UTC    dB Audio  Message
070845  -9 2107  SM7RDT LB8MG RR73
065600 -21 1528  SM7RDT SP2EUI JO93 (x4)
204600 -22 1834  SM7RDT OK6AB -16 (x3)
210445  +4  593  SM7RDT G4ATX -22 (x3)
211315  +0 1924  SM7RDT DR800WE R-17
055045  -7 1025  SM7RDT DH9DR -15 (x3)

20m

UTC    dB Audio  Message
071730 -10 1672  OE6TXW SM7RDT JO66 (x2)
071845  -5 1905  SM7RDT OE6TXW -03 (x2)
071930  -9 1672  OE6TXW SM7RDT 73
060645  -5 1877  SM7RDT DB7GE -08 (x2)
061845 -10 1585  SM7RDT F6JON/QRP +00
130700 -14 2376  SM7RDT 7Z1DV -10 (x3)
131930  +1 1515  SM7RDT F5IXN JN23
073730 -19 1670  SM7RDT SV5BYP KM46 (x3)

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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