SV7JAR — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: KN31

Receiver-side FT8 activity involving SV7JAR, decoded by SO8OO in southeastern Poland. 1,150 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 32 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-31.

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 1,150 FT8 messages attributed to SV7JAR as the transmitting token by decoded message structure across 32 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (92%), followed by 40 m (7%) and 80 m (1%). The busiest six-hour window was 03:00-09:00 UTC, containing 43% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -6.7 dB.

Overview

1,150

Messages attributed

UTC dates decoded

145

Active 15-min windows

-6.7 dB

Estimated median S/N

Bands

80m · 9 40m · 77 20m · 1,063 10m · 1

First attributed message: 2026-06-06
Last attributed message: 2026-08-31 03:53 UTC

Observed FT8 message patterns

Attributed sample: 1,150 messages
Active dates: 32 UTC dates
Estimated median S/N: -6.7 dB
Estimated 10th-90th percentile: -16 to +2.8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 132, moderate (-15 to -9 dB) 357, strong (≥ -8 dB) 661.

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 SV7JAR in decoded directed-looking exchanges:

PD0HLA · Netherlands ×2 DK8HC/P · Fed. Rep. of Germany ×2 GJ0KYZ · Jersey ×2 JH5AVM · Japan ×2 YO4NF · Romania ×2 RW6HP · European Russia UA4FKT · European Russia 4X5UK · Israel 7Z1BM · Saudi Arabia 7Z1BQ · Saudi Arabia 9A3AUH · Croatia 9A4CU/P · Croatia

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 SV7JAR

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: KN31 · 595 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,021 km (approx.)
Last such locator decoded: 2026-08-31 03:51 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	SV7JAR S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-31 03:51	40m	+1 / -5	PC2J	-14 / -1	6	✓ Full exchange observed
08-31 03:49	40m	+2 / -	R3DBX	-8 / +8	2	✓ Closing observed
08-31 03:48	40m	- / -	PE1NPS	-15 / -	2	Partial capture
08-31 03:45	40m	+5 / -	WA2HIP	- / +2	6	Partial capture
08-31 03:45	40m	- / +2	F1PBZ	+13 / -	3	Partial capture
08-31 03:45	40m	- / -	TC30AGU	-2 / -	8	Partial capture
08-31 03:42	40m	-1 / -	4L7T	-11 / +6	3	✓ Closing observed
08-30 19:13	40m	+10 / -	JA5NSR	- / -	4	Partial capture
08-30 18:56	40m	+13 / -	TC30AGU	- / -	5	Partial capture
08-30 18:54	40m	+7 / +5	UB3ANV	-4 / +2	6	✓ Full exchange observed
08-30 18:52	40m	+2 / -	ER1CW	- / -11	2	✓ Closing fragment
08-30 18:48	40m	+4 / -7	R3ZBY	+10 / +6	3	✓ Full exchange observed
08-30 18:47	40m	- / -	F1RCQ	-5 / -	3	Partial capture
08-30 18:44	40m	- / -	M9OOS	-4 / -	3	Partial capture
08-30 18:43	40m	-2 / 0	DO4AW	-8 / -	7	✓ Closing observed
08-30 18:41	40m	-6 / -	PD2RAL	- / -1	4	Partial capture
08-30 18:22	40m	0 / -	II7MGML	- / -	11	Partial capture
08-29 06:23	20m	- / -	OE2EJN	-9 / -	2	Partial capture
08-29 06:23	20m	- / -	R7OV	+1 / -	4	Partial capture
08-29 06:22	20m	+10 / -	F4HSB	- / -8	2	✓ Closing fragment
08-29 06:19	20m	+9 / -	DK8HC/P	- / -4	4	✓ Closing fragment
08-29 06:16	20m	+11 / -	UA1AOF	- / -10	4	Partial capture
08-29 06:11	20m	+12 / -	VK2GCA	- / -11	4	Partial capture
08-28 19:59	40m	+3 / -	BG0HP	- / -1	9	✓ Closing fragment
08-28 19:57	40m	+8 / -	JA8DIV	- / -	4	Partial capture
08-28 19:50	40m	-1 / +1	DK7ZT	0 / -4	6	✓ Full exchange observed
08-28 19:48	40m	-1 / -	JG3LGD	- / -15	4	✓ Closing fragment
08-28 19:48	40m	+2 / -	TA3GO	-2 / -	10	✓ Closing observed
08-28 19:45	40m	-1 / -11	GJ0KYZ	+4 / -4	6	✓ Full exchange observed
08-27 03:40	20m	- / -	RA9FUE	-13 / -	3	Partial capture
08-14 06:10	20m	-10 / -	9K2HN	- / -	2	Partial capture
08-13 19:39	80m	- / -	IT9FEG	-10 / -	2	Partial capture
08-13 19:34	80m	+2 / -	LZ01MIKU	- / -	8	Partial capture
08-13 19:32	80m	+3 / -4	R8FB	-5 / -	3	Partial capture
08-12 09:41	20m	-17 / -	UA2FFD	- / -	6	Partial capture
08-12 09:36	20m	-17 / +10	F6ARS	-2 / -13	11	✓ Full exchange observed
08-12 09:35	20m	-19 / -2	R6OAG	-16 / -10	2	Partial capture
08-12 09:33	20m	-7 / -	SP9FB	- / -	2	Partial capture
08-12 09:04	20m	- / -	DG6TOM	-7 / -	5	Partial capture
08-12 09:02	20m	-16 / -	HZ1YJ	- / -22	3	✓ Closing fragment
08-12 05:06	20m	-6 / -	N8HRZ	- / -13	4	Partial capture
08-12 05:03	20m	-6 / +3	ES2AJ	+6 / +8	4	✓ Full exchange observed
08-12 04:57	20m	-6 / -	TI5RR	- / -15	2	Partial capture
08-12 04:56	20m	- / -	UA3ZMQ	-22 / -	3	Partial capture
08-12 04:53	20m	-2 / -	OZ1BLP	- / -13	2	Partial capture
08-12 04:52	20m	0 / -	OD5KU	- / -	2	Partial capture
08-12 04:51	20m	+3 / -	F1MXE	- / -13	2	✓ Closing fragment
08-12 04:47	20m	- / -15	YO8RSL	-13 / -	3	✓ Closing fragment
08-12 04:28	20m	-6 / -	LZ1ZF	- / -	4	Partial capture
08-12 04:26	20m	-4 / -	NE5TX	- / -2	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
034845  +5 2514  WA2HIP SV7JAR +01
034900 -15 2286  SV7JAR PE1NPS JO22
034915  +2 2513  R3DBX SV7JAR R+08
035000  -5  304  <SV7JAR> TC30AGU
035000  -8 1539  SV7JAR R3DBX RR73
035015  -4 1540  ZA/IK3BNO SV7JAR +09
035030  +1  304  SV7JAR TC30AGU
035115  -2 1539  CQ SV7JAR KN31                        a1
035130 -15 1540  SV7JAR PC2J JO22
035145  +2 1540  PC2J SV7JAR -01
035200 -11 1540  SV7JAR PC2J JO22
035215  +0 1539  PC2J SV7JAR -01
035230 -14 1540  SV7JAR PC2J R-05 (x2)
035345  +2 1540  IU5SCG SV7JAR +01

20m

UTC    dB Audio  Message
061845  +6  403  DK9NP SV7JAR R+06
061915  +6  403  DK8HC/P SV7JAR R-04 (x4)
062145 +12  403  SQ9CXH SV7JAR -08
062215  +8  403  F4HSB SV7JAR -08
062245 +14  403  CQ SV7JAR KN31
062300  +0  403  SV7JAR R7OV KN87
062315 +11  403  F4HSB SV7JAR RR73
062330  -2  403  SV7JAR R7OV KN87
062330 -11 1333  SV7JAR OE2EJN JN67
062400  +5  403  SV7JAR R7OV KN87
062400  -7 1333  SV7JAR OE2EJN JN67
062430  +2  403  SV7JAR R7OV KN87

80m

UTC    dB Audio  Message
193230  +3 2040  R8FB SV7JAR KN31
193315  -4 2039  SV7JAR R8FB -04 (x2)
193415  +0 1866  LZ01MIKU SV7JAR KN31 (x4)
193600 -10 2506  SV7JAR IT9FEG JM77
193615  +6 1866  LZ01MIKU SV7JAR KN31 (x4)
193900 -10 2435  SV7JAR IT9FEG JM77 (x2)

10m

UTC    dB Audio  Message
083200 -22 1480  SV7JAR R6DV LN04 (x2)
083400  -9  475  SV7JAR ON4KEB JO20
083745  -8  473  CQ SV7JAR KN31
083930 -18 2465  SV7JAR DN9AD JO52
151300  +5  742  SV7JAR IU3QCG JN55 (x4)
091630  -3 2553  SV7JAR PE1LYU -23
073130 -17 2111  SV7JAR UA4FKT 73
073900  -7 1126  SV7JAR DL3MIB JN57 (x2)
074100  +6 2640  SV7JAR F1PBZ -08 (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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