SP4TZ — 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: Poland Most frequent locator attributed to this token: KO13

Receiver-side FT8 activity involving SP4TZ, decoded by SO8OO in southeastern Poland. 204 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-15.

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 204 FT8 messages attributed to SP4TZ as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (52%), followed by 160 m (31%) and 80 m (10%). Several six-hour UTC windows tied for the largest share (47%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

204

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

160m · 63 80m · 20 40m · 106 20m · 15

First attributed message: 2026-06-07
Last attributed message: 2026-10-15 19:26 UTC

Observed FT8 message patterns

Attributed sample: 204 messages
Active dates: 10 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -17 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 27, moderate (-15 to -9 dB) 72, strong (≥ -8 dB) 105.

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 SP4TZ in decoded directed-looking exchanges:

OK1FHI · Czech Republic ×2 F5SJC · France 9A2AJ · Croatia DK7ZT · Fed. Rep. of Germany E77EA · Bosnia-Herzegovina ES3TI · Estonia EW1I · Belarus HA5AO · Hungary OM2WQ · Slovak Republic OZ9GA · Denmark PA3FR · Netherlands SM7XON · Sweden

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 SP4TZ

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: KO13 · 115 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 405 km (approx.)
Last such locator decoded: 2026-10-15 19:24 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	SP4TZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-15 19:24	160m	-14 / -19	OM2WQ	+8 / -8	6	✓ Full exchange observed
10-15 19:23	160m	-16 / -6	DK7ZT	+1 / -23	4	✓ Full exchange observed
10-15 19:20	160m	-4 / -	OZ9GA	-13 / -20	4	✓ Closing observed
10-15 19:18	160m	-10 / -	ES3TI	-5 / -	2	✓ Closing observed
10-15 19:15	160m	-12 / -	UD8D	- / -	2	Partial capture
10-15 19:12	160m	-5 / -	EB5A	- / -	3	Partial capture
10-15 19:05	160m	-6 / -5	E77EA	+9 / -1	5	✓ Full exchange observed
10-15 19:04	160m	-15 / -14	SM7XON	-2 / -	3	✓ Closing observed
10-15 19:02	160m	-10 / -	F5SOI	- / -	2	Partial capture
10-15 18:59	160m	-15 / -22	HA5AO	+6 / -15	6	✓ Full exchange observed
10-09 19:01	80m	+10 / -	R3ZBY	- / -5	2	✓ Closing fragment
10-09 18:57	80m	+14 / -	LZ2SJ	-4 / -7	6	✓ Closing observed
10-09 18:57	80m	+15 / -	SP5DFK/QRP	-7 / -10	2	✓ Closing observed
10-06 10:33	40m	-8 / -	RL6ZZ	- / -9	2	✓ Closing fragment
10-06 10:32	40m	-14 / +2	EW2GI	-15 / +3	4	✓ Full exchange observed
10-06 10:24	40m	-2 / -12	DL2VN	-8 / -11	5	✓ Full exchange observed
10-06 10:22	40m	-8 / -	DK2MAX	- / -19	3	✓ Closing fragment
10-06 10:19	40m	-8 / -1	DL3FSC	+2 / +5	5	✓ Full exchange observed
10-06 10:12	40m	-7 / -	DL0RDG	-18 / -7	3	✓ Closing observed
10-06 10:01	40m	- / -16	DA1ST	-7 / -	3	✓ Closing fragment
10-06 09:50	40m	-16 / -	IN3IBW	-11 / -	2	✓ Closing observed
10-06 09:47	40m	-16 / -15	HA1BF	-12 / -4	3	✓ Full exchange observed
10-06 09:42	40m	-14 / -	US1MM	-1 / -2	6	Partial capture
09-05 19:15	160m	-15 / -	IK0HBN	- / -12	4	Partial capture
09-05 19:08	160m	-17 / -	SV8JE	- / -21	5	Partial capture
09-05 19:06	160m	-17 / -	9A2AJ	- / -9	2	✓ Closing fragment
09-05 19:01	160m	-16 / -15	EW1I	+3 / +3	3	✓ Full exchange observed
09-05 18:58	160m	-16 / -18	SP9UPH	+13 / -9	4	✓ Full exchange observed
09-05 18:55	160m	-18 / -15	PA3FR	-6 / -11	5	✓ Full exchange observed
09-05 17:25	80m	0 / -9	OK2RM	-17 / -11	5	✓ Full exchange observed
09-05 17:24	80m	+4 / -	SQ1EIC	-8 / -1	4	✓ Closing observed
09-05 17:23	80m	+6 / -	YL2TM	- / -8	2	✓ Closing fragment
09-05 17:21	80m	+7 / -8	UR4LG	-12 / -7	6	✓ Full exchange observed
09-05 17:20	80m	+8 / 0	SP9WAZ	+2 / -6	5	✓ Full exchange observed
09-04 17:28	40m	-7 / -	UW5KW	-2 / -2	5	Partial capture
09-04 17:27	40m	-3 / -17	OZ1NIB	-17 / -4	3	Partial capture
08-30 06:52	20m	- / -5	F5SZB	+13 / -	2	✓ Closing fragment
08-30 06:31	20m	- / 0	E70SZ	0 / -	3	✓ Closing fragment
08-30 06:28	20m	- / -11	UB4CJS	+1 / -	2	✓ Closing fragment
08-30 06:17	20m	- / -	RZ9A	-5 / -	3	Partial capture
08-30 05:39	20m	- / -13	R3KCW	+13 / -	3	✓ Closing fragment
08-30 05:37	20m	- / -2	UA3VVA	+11 / -	4	✓ Closing fragment
08-30 05:35	20m	- / -10	EA4HEW	-4 / -	2	✓ Closing fragment
08-27 08:35	20m	- / +7	G8KLC	-10 / -	2	✓ Closing fragment
08-25 05:55	40m	-6 / -	PV8AJ	- / -	5	Partial capture
08-25 05:54	40m	-10 / -5	YO3GNF	-14 / -6	6	✓ Full exchange observed
08-25 05:52	40m	-12 / -3	SP6AXW	-2 / -7	8	✓ Full exchange observed
08-25 05:49	40m	-14 / -14	IW2DNI	-8 / -7	8	✓ Full exchange observed
08-25 05:49	40m	-14 / +5	OK1FHI	+5 / 0	5	✓ Full exchange observed
08-25 05:47	40m	-12 / -	PV8AJ	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
191945 -12 1345  SV2AEL SP4TZ KO13
192045  -6 1096  OZ9GA SP4TZ KO13 (x2)
192130 -13 1002  SP4TZ OZ9GA RR73
192145  -1 1096  OZ9GA SP4TZ 73
192300  +2  823  SP4TZ DK7ZT -06
192315 -17 1096  DK7ZT SP4TZ R-23
192330  +0  824  SP4TZ DK7ZT RR73
192345 -14 1096  DK7ZT SP4TZ 73
192445 -17 1096  OM2WQ SP4TZ KO13
192500 +11 1840  SP4TZ OM2WQ -19
192515 -10 1096  OM2WQ SP4TZ R-08 (x2)
192600  +6 1840  SP4TZ OM2WQ RRR
192615 -13 1096  OM2WQ SP4TZ 73

80m

UTC    dB Audio  Message
172600 -24 1632  SP4TZ OK2RM RRR
172615  +0 1642  OK2RM SP4TZ 73
185630 +17 1471  CQ SP4TZ KO13
185700 +15 1471  SP5DFK/QRP SP4TZ -10
185715  +0 1904  SP4TZ LZ2SJ KN33
185745  -7 1469  <SP4TZ> SP5DFK/QRP 73
185745  -8 1904  SP4TZ LZ2SJ KN33 (x2)
185830 +14 1471  LZ2SJ SP4TZ -07 (x3)
190100 +13 1471  CQ SP4TZ KO13
190115  +3  808  SP4TZ DO5HOK JO41
190130 +11 1471  R3ZBY SP4TZ R-05 (x2)

40m

UTC    dB Audio  Message
103230 -14 1301  SP4TZ EW2GI KO43
103245 -14  794  EW2GI SP4TZ +03
103300 -16 1300  SP4TZ EW2GI R+02 (x2)
103345  -7  794  RL6ZZ SP4TZ -09 (x2)
103445  -8  794  CQ SP4TZ KO13 (x9)

20m

UTC    dB Audio  Message
061700  -5  945  SP4TZ RW6HPS LN15
061730  -3 1665  SP4TZ RZ9A MO04 (x2)
062830  +3 1182  SP4TZ UB4CJS -11 (x2)
063130  +0 1944  SP4TZ UA3PAB KO84
063130  -2  944  SP4TZ E70SZ JN84 (x3)
065230 +14  425  SP4TZ F5SZB -05 (x2)
183845 -15 1189  SP4TZ M7KSV +06
183945 -15 1563  SP4TZ DL1UDO JO31
184515  -7 2692  SP4TZ IW5ALZ JN53
185345  -4 1651  SP4TZ M7JVT IO94

10m

UTC    dB Audio  Message
091745 -13  605  SP4TZ F5SJC JN05
091815 +16  491  SP4TZ IK4LZH JN54
091815  -9  605  SP4TZ F5SJC R+02
091845 +11  491  SP4TZ IK4LZH JN54
091845  -6  605  SP4TZ F5SJC 73

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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