GM4YXI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Scotland Most frequent locator attributed to this token: IO87

Receiver-side FT8 activity involving GM4YXI, decoded by SO8OO in southeastern Poland. 200 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, across 12 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-21.

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 200 FT8 messages attributed to GM4YXI as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (56%), followed by 40 m (31%) and 80 m (13%). Several six-hour UTC windows tied for the largest share (89%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was -2 dB.

Overview

200

Messages attributed

UTC dates decoded

Active 15-min windows

-2 dB

Estimated median S/N

Bands

160m · 112 80m · 26 40m · 62

First attributed message: 2026-06-07
Last attributed message: 2026-09-21 09:23 UTC

Observed FT8 message patterns

Attributed sample: 200 messages
Active dates: 12 UTC dates
Estimated median S/N: -2 dB
Estimated 10th-90th percentile: -14 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 37, strong (≥ -8 dB) 149.

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 GM4YXI in decoded directed-looking exchanges:

5Z4VJ · Kenya ×2 4X1UF · Israel HS0ZNR · Thailand R9FF · European Russia RI1FJZ · Franz Josef Land UT5UGR · Ukraine AP2N · Pakistan BI3UPU · China BI6AN · China D44TWO · Cabo Verde TI4LAS · Costa Rica VI9POL · Australia

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 GM4YXI

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: IO87 · 139 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,821 km (approx.)
Last such locator decoded: 2026-09-21 09:23 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	GM4YXI S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 09:22	40m	-16 / -	HC2GRC	- / -	3	Partial capture
09-21 06:51	40m	-8 / -	TI4LAS	- / +2	3	✓ Closing fragment
09-20 18:54	160m	+1 / -	JF8QNF	- / -	6	Partial capture
09-20 18:49	160m	+1 / -8	UT5UGR	+19 / -	6	✓ Full exchange observed
09-20 18:48	160m	-1 / -2	4X1UF	+2 / +2	5	✓ Full exchange observed
09-20 18:46	160m	- / -10	DK7ZT	-19 / -	3	Partial capture
09-20 18:46	160m	- / -	RC2DD	-11 / -	3	Partial capture
09-20 18:44	160m	-8 / -	R9FF	- / -12	2	✓ Closing fragment
09-20 18:44	160m	- / -	UA3ZUX	+4 / -	2	Partial capture
09-20 18:42	160m	-10 / -	RI1FJZ	- / -10	4	✓ Closing fragment
09-20 18:37	40m	+10 / -	E21AZ	- / -	5	Partial capture
09-20 18:24	80m	+2 / -	RI1FJZ	- / -3	2	Partial capture
09-20 18:24	80m	- / -23	UR4LRG	+16 / -	13	Partial capture
09-20 07:12	40m	-11 / -	ZL2NU	- / -3	2	Partial capture
09-16 18:26	80m	- / 0	DK7ZT	+8 / -	5	Partial capture
09-16 18:26	80m	- / -	DO9BAU	+9 / -	13	Partial capture
09-14 21:14	80m	- / -	IZ2AMW	-1 / -	5	Partial capture
09-14 21:13	80m	+5 / -	4L7T	+2 / -1	5	✓ Full exchange observed
09-14 21:06	40m	-1 / -	D44TWO	- / -	6	✓ Closing fragment
09-12 07:33	40m	- / -	SP6FME	+9 / -	3	Partial capture
09-12 07:28	40m	-15 / -	VI9POL	- / -2	8	✓ Closing fragment
09-12 07:15	40m	- / -	PA3AGN	-16 / -	2	Partial capture
09-12 07:15	40m	- / -	HG8LXL	-2 / -	4	Partial capture
09-12 07:08	40m	-10 / -	VI9POL	- / -	5	Partial capture
09-12 07:04	40m	- / -	F5PBG	-16 / -	3	Partial capture
09-09 19:39	160m	- / -	F4HAB	-16 / -	2	Partial capture
09-09 19:35	160m	-3 / -	V51WH	- / -	18	Partial capture
09-06 18:44	40m	+12 / -	A61DD	- / -	7	Partial capture
09-06 18:38	40m	- / -	DK7ZT	-4 / -	4	Partial capture
09-06 18:36	40m	+5 / -	5Z4VJ	-17 / -2	5	✓ Closing observed
09-04 21:45	160m	0 / -	RI1FJL	- / -	18	Partial capture
09-04 21:39	80m	+2 / -	VR2ZXP	- / -	5	Partial capture
09-04 19:03	40m	- / -	DK7ZT	-8 / -	4	Partial capture
09-04 19:01	40m	+8 / -	VJ6X	- / -11	5	✓ Closing fragment
09-04 18:58	40m	+8 / -	BI6AN	- / -5	3	✓ Closing fragment
09-04 18:56	40m	+4 / -	BI3UPU	- / -22	2	✓ Closing fragment
09-04 18:56	40m	- / +5	DK7ZT	0 / -	2	Partial capture
09-04 18:53	40m	+5 / -	EK1KE	- / -	3	Partial capture
09-03 20:54	160m	-9 / -	RI1FJL	- / -17	43	Partial capture
09-03 20:52	160m	- / -	IU3RRX	-13 / -	2	Partial capture
09-03 20:49	160m	-6 / -	HS0ZNR	- / -6	4	✓ Closing fragment
09-02 21:27	80m	- / -	PE1NPS	-6 / -	4	Partial capture
09-02 21:27	80m	- / -	TA3GO	-8 / -	2	Partial capture
09-02 21:25	80m	-6 / -7	V51WH	-8 / -8	6	✓ Full exchange observed
09-02 21:24	80m	- / +2	DK7ZT	+10 / -	4	Partial capture
09-02 21:24	80m	- / -	EA1IOK	-2 / -	2	Partial capture
09-02 21:23	80m	0 / -11	5Z4VJ	-14 / -	3	✓ Closing observed
08-30 22:11	40m	-1 / -	TT1GD	- / -18	2	Partial capture
08-26 22:24	40m	+7 / -	AP2N	- / -5	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
210900  -1 2351  D44TWO GM4YXI R+14 (x2)
071200 -10 1925  ZL2NU GM4YXI IO87 (x2)
183715 +10 2603  E21AZ GM4YXI IO87 (x5)
065115 -11 2055  TI4LAS GM4YXI IO87 (x3)
092200 -16 2132  HC2GRC GM4YXI IO87 (x3)

160m

UTC    dB Audio  Message
184915  +4 2646  GM4YXI UA3ZUX KO90
184915 -12 1023  GM4YXI RX3DTN KO85
184945 +20  708  GM4YXI UT5UGR -08 (x2)
185100  -3 2310  UT5UGR GM4YXI R+14
185115 +19  708  GM4YXI UT5UGR RR73
185130  +5 2310  UT5UGR GM4YXI 73
185145  +9 2646  GM4YXI UA3ZUX KO90
185145 -14 1564  GM4YXI DL6EL JN57
185430  +0 2310  JF8QNF GM4YXI IO87 (x6)

80m

UTC    dB Audio  Message
182430 +14 2638  GM4YXI UR4LRG KO80
182445  +4 2502  RI1FJZ GM4YXI IO87
182500 +15 2638  GM4YXI UR4LRG KO80 (x3)
182615  -1 2502  RI1FJZ GM4YXI R-03
182630 +14 2638  GM4YXI UR4LRG KO80 (x9)

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee