GM4CXM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Scotland Locator transmitted in a decoded message: IO75

Receiver-side FT8 activity involving GM4CXM, decoded by SO8OO in southeastern Poland. 301 related FT8 messages, 34 CQ messages, observed on 160m, 80m, 60m, 40m, 20m, 10m, across 30 UTC dates. Heard between 2026-05-26 and 2026-08-23.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

301

Related messages

CQ messages

UTC dates heard

-6 dB

Mean decoder S/N

Bands

80m 20m 40m 60m 10m 160m

First seen: 2026-05-26
Last seen: 2026-08-23 18:42 UTC

Frequent QSO partners observed at SO8OO

Stations GM4CXM worked most often, as logged from our receiver:

F1IQH · France ×3 UA9SAV · Asiatic Russia ×2 DA6MS · Fed. Rep. of Germany ×2 ON4MAP · Belgium ×2 4L7T · Georgia ×2 PD9JPV · Netherlands ×2 M8JJS · England HL2CFY · Republic of Korea E75W · Bosnia-Herzegovina SQ1MAK · Poland PD4RJ · Netherlands JH3UHG · Japan

Activity Heatmap

Locator transmitted by GM4CXM

Approximate centre of IO75, decoded 2026-08-23 20:41 UTC. A transmitted locator is not proof of the operator's permanent location.

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	GM4CXM S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 20:41	20m	+17 / -	DL3EBJ	+4 / 0	5	✓ Full exchange observed
08-23 20:40	20m	+12 / -	IU2VUZ	- / -24	2	✓ Closing fragment
08-23 20:06	20m	- / -	OE7MAH	-8 / -	2	Partial capture
08-23 20:05	20m	-4 / -	SP6FME	- / -2	2	✓ Closing fragment
08-23 20:03	20m	-3 / -	SP6AXW	- / +1	2	✓ Closing fragment
08-23 20:01	20m	+5 / -	ER3CT	- / -1	3	✓ Closing fragment
08-20 03:48	80m	-11 / -	KF8EXX	- / -	2	Partial capture
08-20 03:45	80m	-15 / -	HI3QMT	- / -	3	Partial capture
08-20 03:40	80m	-17 / -	KF8EXX	- / -	4	Partial capture
08-20 03:36	80m	-18 / -	HI3QMT	- / -	2	Partial capture
08-20 03:34	80m	-19 / -14	YO3GNF	-24 / -18	4	✓ Full exchange observed
08-20 03:32	80m	-18 / -5	UR1CCT	+4 / +3	5	✓ Full exchange observed
08-20 03:31	80m	-19 / -16	YO6LM	-8 / -16	5	✓ Full exchange observed
08-20 03:29	80m	-12 / -	HI3QMT	- / -	3	Partial capture
08-20 03:26	80m	-9 / -	KP2B	- / -16	6	✓ Closing fragment
08-20 03:25	80m	-6 / -	CX6TU	- / -20	3	✓ Closing fragment
08-20 03:23	80m	-10 / -5	OE5DML	+4 / -6	5	✓ Full exchange observed
08-20 03:22	80m	-8 / -13	E75FM	0 / -13	5	✓ Full exchange observed
08-17 22:44	20m	- / -14	DK7ZT	-9 / -	2	Partial capture
08-17 22:31	20m	- / -13	DK7ZT	-12 / -	4	Partial capture
08-17 22:21	20m	- / -18	DK7ZT	-13 / -	5	Partial capture
08-17 22:14	20m	- / +3	YO4NF	-4 / -	2	Partial capture
08-17 22:10	20m	- / +4	UT5MD	+8 / -	2	Partial capture
08-17 21:53	20m	- / -13	DK7ZT	-13 / -	2	Partial capture
08-17 21:49	20m	- / -1	YO4ATW	-8 / -	2	✓ Closing fragment
08-17 21:45	20m	- / -4	DK7ZT	-14 / -	2	Partial capture
08-17 19:04	20m	-1 / -	HB9HRB	- / -	3	Partial capture
08-17 19:03	20m	-4 / -	RZ4AZ	- / -9	2	✓ Closing fragment
08-17 19:02	20m	0 / -	IU4PRI	-20 / +9	5	✓ Full exchange observed
08-17 18:58	20m	-1 / -	RY3PAG	- / -15	3	✓ Closing fragment
08-17 18:57	20m	0 / -	RZ4AZ	-17 / -7	2	Partial capture
08-17 18:56	20m	+5 / -	MM0TBH	- / +2	3	✓ Closing fragment
08-17 18:55	20m	-3 / -10	TA6MMI	-16 / -18	5	✓ Full exchange observed
08-17 18:51	20m	-6 / -	BG7JPT	- / -15	2	Partial capture
08-17 18:47	20m	-5 / -	TA1SW	- / -25	2	Partial capture
08-17 18:38	20m	- / -13	OS4K	-3 / -	3	Partial capture
08-17 18:37	20m	-1 / -	BI6AN	- / -13	3	✓ Closing fragment
08-17 18:34	20m	-6 / -	BI4IWL	- / -25	2	Partial capture
08-17 18:30	20m	-8 / -	BU2FW	- / -21	4	Partial capture
08-17 18:28	20m	-3 / -	YL2KF	- / -2	3	✓ Closing fragment
08-16 22:43	20m	-17 / -	RA0SCA	- / -6	3	✓ Closing fragment
08-16 22:33	20m	-18 / -	W0OVX	- / -14	2	Partial capture
08-16 22:25	20m	-14 / -	BA3NZ	- / -	2	Partial capture
08-16 22:17	20m	-17 / -	BV2NF	- / -20	4	✓ Closing fragment
08-16 22:17	20m	- / +2	YO4NF	-5 / -	2	Partial capture
08-16 22:15	20m	-18 / -	DS5USH	- / -21	3	✓ Closing fragment
08-16 22:14	20m	-13 / -	JA4DND	- / -13	2	✓ Closing fragment
08-16 22:13	20m	-16 / -	N0STL	- / -22	2	✓ Closing fragment
08-16 22:07	20m	- / +3	IK4TVP	-19 / -	4	Partial capture
08-16 22:06	20m	-12 / -	LU3OZ	- / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
200500  -4 1653  SP6FME GM4CXM -02
200515 -13  914  GM4CXM JE1NVD PM96
200530  -3 1653  SP6FME GM4CXM RR73
200615  -8 2908  GM4CXM OE7MAH +20 (x2)
200700  -1 1654  RA1QX GM4CXM RR73
200945  -4 2908  GM4CXM OE7MAH +22
204015 +10  846  IU2VUZ GM4CXM R-24 (x2)
204115 +15  846  DL3EBJ GM4CXM IO75
204130  +2  635  GM4CXM DL3EBJ +21
204145 +19  845  DL3EBJ GM4CXM R+00
204200  +5  634  GM4CXM DL3EBJ RR73
204215 +16  845  DL3EBJ GM4CXM 73
204245 +21  846  OK2VCR GM4CXM -03

80m

UTC    dB Audio  Message
033515 -24 1779  GM4CXM YO3GNF R-14
033600 -21 1654  YO3GNF GM4CXM RR73
033645 -19 1654  HI3QMT GM4CXM IO75 (x2)
033830 -15 1654  TI2JR GM4CXM IO75
034045 -15 1654  KF8EXX GM4CXM IO75 (x4)
034500 -23 2440  TI2JR GM4CXM IO75
034545 -15 2441  HI3QMT GM4CXM IO75 (x3)
034815 -12 2204  KF8EXX GM4CXM IO75 (x2)

40m

UTC    dB Audio  Message
212930 -12 2177  PD4RJ GM4CXM 73
212945 -13 1609  GM4CXM GW0ARK +06
213030 -11 2177  GW0ARK GM4CXM 73
213100  -8 2177  CQ GM4CXM IO75
213115  -7 2736  GM4CXM F1PBZ -02
213130  -9 2177  DH6MM GM4CXM -06
213145  -8 2736  GM4CXM F1PBZ -02
213200 -10 2177  DH6MM GM4CXM RR73
213230 -14 2177  CQ GM4CXM IO75
213300 -11 2177  DH6MM GM4CXM +10
213400 -10 2177  PY4LX GM4CXM -25 (x2)
213500  -9 2177  SP9DPI GM4CXM -20 (x3)

10m

UTC    dB Audio  Message
230615 -10  659  GM4CXM SV2CLJ -13 (x2)
070745 -22 1645  GM4CXM YO4GIY -10 (x2)
070845  -7 1157  GM4CXM DN9SGE JO42
070915  +2 2948  GM4CXM DO1FDK JO41
070915  -5 1157  GM4CXM DN9SGE R+09
070945  +0 2948  GM4CXM DO1FDK JO41
070945  -3 1157  GM4CXM DN9SGE 73
071045  +3 2947  GM4CXM DO1FDK JO41

60m

UTC    dB Audio  Message
231115  -9  782  M0HQB GM4CXM IO75 (x3)
231300  -4  737  GM4CXM F1IQH -02
231315 -10  782  F1IQH GM4CXM R+21
231330  -5  737  GM4CXM F1IQH RR73
231345 -11  782  F1IQH GM4CXM 73
231445 -11  782  MW0RSS GM4CXM +04 (x2)

160m

UTC    dB Audio  Message
222915 -23 1807  DD0AM GM4CXM IO75 (x3)
223200  +2  903  GM4CXM DD7EE -03
223215 -24 1807  DD7EE GM4CXM R-08
223230  +4  903  GM4CXM DD7EE RR73
223245 -24 1807  DD7EE GM4CXM 73

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.