SM7HJZ — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Sweden Most frequent locator attributed to this token: JO75

Receiver-side FT8 activity involving SM7HJZ, decoded by SO8OO in southeastern Poland. 250 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 23 UTC dates in the available aggregate history. Observed between 2026-08-17 and 2026-10-22.

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 250 FT8 messages attributed to SM7HJZ as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (58%), followed by 60 m (19%) and 80 m (15%). Most decodes (66%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was -3 dB.

Overview

250

Messages attributed

UTC dates decoded

Active 15-min windows

-3 dB

Estimated median S/N

Bands

160m · 14 80m · 37 60m · 48 40m · 145 20m · 6

First attributed message: 2026-08-17
Last attributed message: 2026-10-22 20:11 UTC

Observed FT8 message patterns

Attributed sample: 250 messages
Active dates: 23 UTC dates
Estimated median S/N: -3 dB
Estimated 10th-90th percentile: -17 to +5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 30, moderate (-15 to -9 dB) 33, strong (≥ -8 dB) 187.

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 SM7HJZ in decoded directed-looking exchanges:

DL9KM · Fed. Rep. of Germany ×2 SP6FME · Poland ×2 F8BON · France ×2 DN9DSP · Fed. Rep. of Germany HB9EFK · Switzerland IW8XLD · Italy EW2ZC · Belarus R9SAP · Asiatic Russia RA1N · European Russia LA4ROA · Norway N2BJ · United States NL8F · Alaska

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 SM7HJZ

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: JO75 · 127 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 769 km (approx.)
Last such locator decoded: 2026-10-22 20:11 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	SM7HJZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 17:36	80m	-17 / -	RA9FUE	- / -	2	Partial capture
10-22 17:12	60m	-10 / -	IU2VUD	- / -7	2	✓ Closing fragment
10-22 17:10	60m	-12 / +10	OZ5AGJ	-16 / +10	4	✓ Full exchange observed
10-16 06:47	80m	- / -15	F4LHL	-12 / -	3	✓ Closing fragment
10-16 05:33	40m	-12 / -	RQ7R	- / -	3	Partial capture
10-16 05:29	40m	-6 / -	RQ7R	- / -	2	Partial capture
10-13 06:59	60m	-18 / -15	F8BON	-17 / -	4	✓ Closing observed
10-08 19:49	80m	-3 / -23	US5EDZ	-6 / -	9	Partial capture
10-08 19:29	60m	-22 / -	ES5MG	-17 / +1	4	Partial capture
10-08 19:27	60m	-21 / +8	OH3KRH	-19 / -14	4	✓ Full exchange observed
10-08 18:52	60m	-17 / -	A93MO	- / -	9	Partial capture
10-08 18:42	40m	-18 / -7	EX7CQ	-9 / -11	4	✓ Full exchange observed
10-03 19:56	160m	-12 / -19	EW2ZC	+3 / -17	12	✓ Full exchange observed
10-03 19:54	160m	+7 / -15	RA1N	+14 / -8	5	✓ Full exchange observed
09-17 21:43	60m	-1 / -	SP4NDY	-16 / -12	4	✓ Closing observed
09-17 20:20	40m	-2 / -16	A61DD	-12 / -18	8	✓ Full exchange observed
09-16 16:01	40m	-7 / -	UB8CQJ	- / -	4	Partial capture
09-16 15:59	40m	+2 / -	UA9ZZ	- / -	3	Partial capture
09-16 15:53	40m	-4 / -16	R4DD	-5 / -2	5	✓ Full exchange observed
09-15 04:56	40m	- / -10	IK4TVP	-12 / -	4	Partial capture
09-15 04:53	40m	-12 / -	KE9END	- / -13	5	✓ Closing fragment
09-15 03:54	40m	-7 / -	KP2B	- / -	3	Partial capture
09-15 03:13	40m	- / -13	RW9WJ	-16 / -	2	✓ Closing fragment
09-15 02:19	80m	-4 / -	VA3MO	- / -	2	Partial capture
09-14 05:11	40m	+3 / -	KA9FOX	- / -	3	Partial capture
09-14 04:26	60m	- / -	SP8DK	-10 / -	2	Partial capture
09-14 04:25	60m	-6 / -	VE2CKW	- / -14	4	✓ Closing fragment
09-13 04:24	60m	-7 / -10	KP2B	-17 / -12	5	✓ Full exchange observed
09-13 04:22	80m	-3 / -	VP2MAA	- / -	2	Partial capture
09-13 04:05	80m	+3 / -21	UY0HY	-16 / -18	7	Partial capture
09-13 04:03	80m	-8 / -4	SP6FME	+14 / +4	6	✓ Full exchange observed
09-13 04:02	80m	-17 / -	LA7DMA	- / -2	3	✓ Closing fragment
09-09 18:40	40m	-1 / -	VJ6X	- / -	4	Partial capture
09-08 04:58	40m	- / -12	R2AVL	-8 / -	2	✓ Closing fragment
09-08 02:59	60m	- / -6	ER3ZW	+8 / -	2	✓ Closing fragment
09-06 16:30	60m	0 / -	OH3CD	- / -	6	Partial capture
09-05 16:01	40m	+1 / +2	SP6FME	+2 / +10	6	✓ Full exchange observed
09-05 16:00	40m	+8 / -1	R3ICU	-10 / -5	5	✓ Full exchange observed
09-05 15:58	40m	-2 / -	LA2W/P	- / -10	4	✓ Closing fragment
09-03 05:30	40m	- / -	IK2ZJR	-6 / -	6	Partial capture
09-03 05:29	40m	-2 / -	K4YT	- / -4	3	✓ Closing fragment
09-02 19:45	40m	+9 / -	VJ6X	- / -24	2	Partial capture
09-02 19:43	40m	-2 / -	OK1WCF	-2 / +10	3	✓ Closing observed
09-02 19:42	40m	+4 / -	EX7CQ	- / -	2	Partial capture
09-02 19:41	40m	-8 / -	US5WAN	- / +2	2	✓ Closing fragment
09-02 19:37	80m	-4 / -	HB0WR	- / -15	2	Partial capture
09-02 19:33	80m	- / +3	SM0NSJ	-16 / -	2	✓ Closing fragment
09-02 19:26	60m	-7 / -1	OZ9FF	0 / -	4	✓ Full exchange observed
09-02 16:41	40m	+1 / -	GJ0KYZ	-8 / -13	9	Partial capture
09-02 16:40	40m	-2 / -	SK4IL	- / +6	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
194930  -6  462  US5EDZ SM7HJZ JO75
194945  -8  463  SM7HJZ US5EDZ -23
195000  -1  462  US5EDZ SM7HJZ JO75
195015  -4  463  SM7HJZ US5EDZ -20
195030  -4  462  US5EDZ SM7HJZ JO75
195045  -5  463  SM7HJZ US5EDZ -21
195100  -1  462  US5EDZ SM7HJZ JO75
195115  -4  463  SM7HJZ US5EDZ -20 (x2)
064715 -11  912  SM7HJZ F4LHL -15 (x3)
173645 -11 1195  RA9FUE SM7HJZ JO75 (x2)
201145  +0  949  UT2PC SM7HJZ JO75

60m

UTC    dB Audio  Message
192830 -21 1290  OH3KRH SM7HJZ 73
192945 -17 2148  SM7HJZ ES5MG KO38
193100 -23 2148  ES5MG SM7HJZ +01 (x3)
065900 -19 1536  F8BON SM7HJZ JO75
065915 -19 1535  SM7HJZ F8BON -15 (x2)
070000 -16 1536  F8BON SM7HJZ 73
171030 -15 2159  SM7HJZ OZ5AGJ +10
171045 -11 2159  OZ5AGJ SM7HJZ R+10
171100 -16 2159  SM7HJZ OZ5AGJ RR73
171115 -14 2159  OZ5AGJ SM7HJZ 73
171245 -11 2440  IU2VUD SM7HJZ -07 (x2)

40m

UTC    dB Audio  Message
202115 -17  826  SM7HJZ A61DD -16
202130  -5  825  A61DD SM7HJZ R-18
202145  -9  826  SM7HJZ A61DD -16
202200  -3  826  A61DD SM7HJZ R-17
202215  -9  826  SM7HJZ A61DD RR73
202230  -3  826  A61DD SM7HJZ 73
184200  -8 1716  SM7HJZ EX7CQ -07
184215 -19 1717  EX7CQ SM7HJZ R-11
184230 -10 1716  SM7HJZ EX7CQ RR73
184245 -16 1717  EX7CQ SM7HJZ 73
052945  -5 2038  RQ7R SM7HJZ JO75 (x5)

160m

UTC    dB Audio  Message
195500  +7  403  RA1N SM7HJZ R-08
195515 +14  403  SM7HJZ RA1N RR73
195530  +5  403  RA1N SM7HJZ 73
195645 -13 1102  EW2ZC SM7HJZ JO75
195700  +0 1102  SM7HJZ EW2ZC -19
195715 -12 1102  EW2ZC SM7HJZ JO75
195730  +2 1102  SM7HJZ EW2ZC -17
195745 -17 1102  EW2ZC SM7HJZ R-17
195800  +8 1102  SM7HJZ EW2ZC RR73
195815  -9 1102  EW2ZC SM7HJZ R-17 (x6)

20m

UTC    dB Audio  Message
065130  -7 2824  VK6KC SM7HJZ JO75
065700 -19 1094  SM7HJZ RY9W RR73
064945 -10 1421  SM7HJZ RD3FY R-08 (x2)
065115  -6 2735  SM7HJZ UN0GY -01
074430 -10 1196  NL8F SM7HJZ R-20 (x2)
083530 -24 2101  LA4ROA SM7HJZ JO75 (x3)
044200 -13  280  SM7HJZ W7MTH RR73
054000  -5 3027  SM7HJZ N2BJ -06 (x2)
083200  -7 2878  SM7HJZ F5PBG IN78

10m

UTC    dB Audio  Message
131030  -4 1052  SM7HJZ IW8XLD -15 (x2)
103930 -15 1312  SM7HJZ DN9DSP -03 (x2)
123715  +3 2495  SM7HJZ HB9EFK -04 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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