SM1HEV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO97

Receiver-side FT8 activity involving SM1HEV, decoded by SO8OO in southeastern Poland. 85 FT8 messages attributed to this token as transmitter, on 160m, 60m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-07-07 and 2026-09-10.

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 85 FT8 messages attributed to SM1HEV as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (46%), followed by 20 m (39%) and 60 m (13%). Several six-hour UTC windows tied for the largest share (85%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (95%); the estimated median was -2 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

160m · 2 60m · 11 40m · 39 20m · 33

First attributed message: 2026-07-07
Last attributed message: 2026-09-10 21:27 UTC

Observed FT8 message patterns

Attributed sample: 85 messages
Active dates: 6 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -7 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 81.

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 SM1HEV in decoded directed-looking exchanges:

OH3GBW · Finland ×2 BA3QIQ · China BG2EFX · China BH5HIE · China BI4XDT · China JH0JLP · Japan JR3IAO · Japan K2B · United States K2I · United States ZL1JRD · New Zealand 9A3AUH · Croatia HG8LXL · Hungary

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 SM1HEV

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: JO97 · 15 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 861 km (approx.)
Last such locator decoded: 2026-09-10 21:25 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	SM1HEV S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-10 21:26	40m	-3 / -	SP6FME	- / -	2	✓ Closing fragment
09-10 21:25	40m	0 / -11	JA5MHD	-2 / -16	4	✓ Full exchange observed
09-10 21:22	40m	+1 / -	DJ0MAB	+13 / -	5	Partial capture
09-10 21:20	40m	-4 / -	OH3GKA	- / +6	2	Partial capture
09-10 21:19	40m	-2 / -	HG8LXL	-13 / -	5	✓ Full exchange observed
09-10 21:18	40m	-2 / -	US2YW	- / +7	2	✓ Closing fragment
09-10 21:17	40m	0 / -	OH3GBW	- / -3	2	✓ Closing fragment
09-10 21:14	40m	-4 / -18	JH4HMG	-15 / -17	8	✓ Full exchange observed
09-10 21:13	40m	- / -15	JA2HYD	-10 / -	3	Partial capture
09-10 21:13	40m	0 / -	PD0LBY	-15 / +6	7	✓ Closing observed
09-10 21:11	40m	+4 / -24	JR3NZC	-7 / -	4	✓ Closing observed
09-10 21:10	40m	- / -	F5RRS	+8 / -	3	Partial capture
09-08 19:15	60m	-1 / -9	DL1SRS	+1 / -1	5	✓ Full exchange observed
09-08 19:13	60m	0 / 0	OH3GBW	-1 / +1	7	✓ Full exchange observed
09-08 19:13	60m	-2 / -1	IK4CBO	-2 / -	6	✓ Full exchange observed
09-08 19:10	60m	-6 / +6	ER3UA	+2 / -	7	✓ Full exchange observed
07-31 18:30	40m	-5 / -4	RA3XFR	-18 / +5	6	✓ Full exchange observed
07-31 18:28	40m	-5 / +1	9A3AUH	-17 / +9	5	✓ Full exchange observed
07-31 18:27	40m	-2 / +2	RN1ON	-10 / +4	5	✓ Full exchange observed
07-31 18:26	40m	-1 / -	SH4HFS	- / -7	2	✓ Closing fragment
07-31 18:25	40m	-5 / -	OZ2LC	- / -	2	✓ Closing fragment
07-31 18:24	40m	-2 / -	R9FDM	- / -6	2	✓ Closing fragment
07-24 20:28	20m	-1 / -	BG2EFX	- / -8	2	✓ Closing fragment
07-24 20:25	20m	0 / -	BI4XDT	- / +6	2	✓ Closing fragment
07-24 20:21	20m	0 / -	BH5HIE	- / -22	2	✓ Closing fragment
07-24 20:20	20m	0 / -	BA8BLK	- / -7	2	Partial capture
07-24 20:19	20m	0 / -	JR3IAO	- / -12	2	✓ Closing fragment
07-24 20:17	20m	0 / -	ZL1JRD	- / -23	2	✓ Closing fragment
07-24 20:16	20m	-1 / -	BA3QIQ	- / -4	2	✓ Closing fragment
07-24 20:14	20m	+1 / -	RA0ZIH	- / -6	3	Partial capture
07-23 21:00	160m	- / -	DK5WL	-6 / -	2	Partial capture
07-23 21:00	160m	- / -	DL6II	+6 / -	4	Partial capture
07-23 20:58	160m	+2 / -	<...>	- / -	2	Partial capture
07-07 13:33	20m	-6 / -	K2I	- / -13	3	✓ Closing fragment
07-07 13:25	20m	-6 / -	K2B	- / -10	7	✓ Closing fragment
07-07 13:21	20m	-8 / -	K2J	- / -9	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
212045  -1 2675  OH3GKA SM1HEV +06 (x2)
212200 +13 2675  SM1HEV DJ0MAB JN49 (x2)
212315  +4 2675  DJ0MAB SM1HEV +12 (x3)
212515  +1 2675  CQ DX SM1HEV JO97
212530  -3  411  SM1HEV JA5MHD -11
212545  +1 2675  JA5MHD SM1HEV R-16
212600  +0  411  SM1HEV JA5MHD RR73
212615  -1 2675  JA5MHD SM1HEV 73
212645  +3 2675  SP6FME SM1HEV +22 (x2)
212800  -3  864  SM1HEV SP3JHZ JO71

60m

UTC    dB Audio  Message
191345  -1 2550  IK4CBO SM1HEV +13
191400  +1  409  SM1HEV OH3GBW KP21
191400  +1 1688  SM1HEV IK4CBO R-01
191415  -3 2550  IK4CBO SM1HEV RR73
191430  -3  409  SM1HEV OH3GBW KP21
191430  +2 1688  SM1HEV IK4CBO 73
191445  -2 2550  OH3GBW SM1HEV +01
191500  +1  409  SM1HEV OH3GBW R+00
191515  +1 2550  OH3GBW SM1HEV RR73
191530  -6  409  SM1HEV OH3GBW 73
191530  +2 2551  SM1HEV DL1SRS JN49
191545  -2 2550  DL1SRS SM1HEV -01
191600  +4 2551  SM1HEV DL1SRS R-09
191615  +0 2550  DL1SRS SM1HEV RR73
191630  -3 2551  SM1HEV DL1SRS 73

20m

UTC    dB Audio  Message
201900  +1 2826  JR3IAO SM1HEV -12 (x2)
202000  +1 2826  BA8BLK SM1HEV R-07 (x2)
202100  +0 2826  BH5HIE SM1HEV -22 (x2)
202200  -1 2826  CQ SM1HEV JO97
202245 -12 2527  SM1HEV F1PBZ -01
202300  +1 2826  JH0JLP SM1HEV RR73
202430  -1 2826  CQ AS SM1HEV JO97
202500  +3 2826  BI4XDT SM1HEV +06 (x2)
202615 -19 1789  SM1HEV SA7BYQ -15
202800  -2 2826  BG2EFX SM1HEV -08 (x2)

160m

UTC    dB Audio  Message
205845  +2 2492  <...> SM1HEV +17 (x2)
210030  +4  942  SM1HEV DL6II JO31
210030  -4 1896  SM1HEV DK5WL JN39
210100  +5  942  SM1HEV DL6II JO31
210100  -7 1896  SM1HEV DK5WL JN39
210130  +8  942  SM1HEV DL6II JO31 (x2)

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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