F4MRA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN23

Receiver-side FT8 activity involving F4MRA, decoded by SO8OO in southeastern Poland. 58 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-08-20.

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 58 FT8 messages attributed to F4MRA as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (84%), followed by 80 m (14%) and 40 m (2%). Several six-hour UTC windows tied for the largest share (60%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 8 40m · 1 20m · 49

First attributed message: 2026-06-17
Last attributed message: 2026-08-20 20:04 UTC

Observed FT8 message patterns

Attributed sample: 58 messages
Active dates: 11 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -21 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 17.

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 F4MRA in decoded directed-looking exchanges:

SV2CLJ · Greece 8B81JB · Indonesia 9K2OK · Kuwait A71CT · Qatar BG5JGG · China EC5M · Spain F4HTA · France IN3GHP · Italy LZ1ZF · Bulgaria OE6TNO · Austria RX3ASQ · European Russia SV1GYG · Greece

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 F4MRA

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: JN23 · 35 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,462 km (approx.)
Last such locator decoded: 2026-08-20 20:04 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	F4MRA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 13:17	40m	- / -	S51PV	-12 / -	3	Partial capture
08-29 20:16	40m	- / -6	IZ8VYU	-1 / -	3	✓ Closing fragment
08-23 18:26	40m	- / -	IU4PPL	-6 / -	2	✓ Closing fragment
08-23 18:26	40m	- / -	DL2BS	-4 / -	9	Partial capture
08-23 18:21	40m	- / -11	DK7ZT	-3 / -	3	✓ Closing fragment
08-23 18:19	40m	- / -	PD8MD	+4 / -	13	Partial capture
08-23 18:18	40m	- / -20	RA4Y	0 / -	4	✓ Closing fragment
08-20 19:55	20m	-16 / -	UN0GY	-2 / -9	2	✓ Closing observed
08-19 14:04	20m	- / -4	DL3EYB	-8 / -	3	Partial capture
08-19 13:53	20m	- / -	PD8MD	-13 / -	3	Partial capture
08-03 06:51	40m	- / -18	DJ0MAB	-12 / -	2	✓ Closing fragment
08-02 20:43	80m	- / -24	DD0AM	-12 / -	3	✓ Closing fragment
08-02 20:40	80m	- / -11	9A5E	+4 / -	2	✓ Closing fragment
07-31 08:08	20m	- / -	DL1R	-1 / -	6	Partial capture
07-31 08:06	20m	- / -7	OE6TNO	-3 / -	3	✓ Closing fragment
07-30 19:11	80m	-15 / 0	DL1IP	-4 / -3	11	✓ Full exchange observed
07-30 19:08	40m	- / -24	RL2F	-18 / -	5	Partial capture
07-30 18:50	20m	-23 / -	9K2OK	- / +5	3	✓ Closing fragment
07-28 19:34	60m	- / -19	HA7TM	+16 / -	3	✓ Closing fragment
07-28 19:30	80m	- / -10	IW4EGP	+14 / -	2	✓ Closing fragment
07-28 06:51	20m	-21 / -	W5XO	- / -	2	Partial capture
07-27 19:16	20m	-10 / -	JH5AVM	- / -	3	Partial capture
07-27 19:14	20m	-5 / -	BG5JGG	- / -25	3	✓ Closing fragment
07-27 08:59	20m	- / -12	EC5M	-20 / -	2	✓ Closing fragment
07-21 10:59	20m	- / +1	IN3GHP	-8 / -	2	✓ Closing fragment
07-09 20:47	80m	- / -15	PI4APD	+3 / -	5	✓ Closing fragment
07-08 17:37	10m	- / -7	SV2CLJ	-6 / -	2	✓ Closing fragment
07-06 21:41	80m	- / -19	E75AA	+7 / -	2	✓ Closing fragment
06-24 20:46	20m	-16 / -	SV1GYG	- / -10	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
182630  -4 2705  F4MRA DL2BS JO32 (x2)
182800  -5  701  F4MRA IU4PPL RR73
182800  -5 2705  F4MRA DL2BS JO32 (x6)
201645  -2 1926  F4MRA IZ8VYU JN71 (x3)
131715  -9 2437  F4MRA S51PV JN76 (x3)

20m

UTC    dB Audio  Message
135315 -13  875  F4MRA PD8MD JO32 (x3)
135715 -12  687  F4MRA PD3LKN JO22
140330  -8  686  CQ POTA F4MRA JN23
140445  -6  687  F4MRA DL3EYB JN59 (x3)
140845 -21 2107  F4MRA EA5D JN00
140845 -17  725  F4MRA DK5UR JO40
141215 -19 1085  F4MRA EC5CSW IM99
195330 -11 1765  F4MRA <...> -16
195530 -16  839  UN0GY F4MRA R-09
195530 -24 1765  <F4MRA> 8B81JB RR73
195545  -2 2181  F4MRA UN0GY RR73

80m

UTC    dB Audio  Message
191200  -6 1153  F4MRA DL1IP JN49
191215 -16 1153  DL1IP F4MRA -02
191230  -2 1153  F4MRA DL1IP R+00
191245 -14 1153  DL1IP F4MRA RR73
191300  -7 1153  F4MRA DL1IP R+00
191315 -14 1153  DL1IP F4MRA RR73
191330  +1 1154  F4MRA DL1IP R+00
191345 -16 1153  DL1IP F4MRA RR73
191400  -3 1153  F4MRA DL1IP 73
204000  +3 2134  F4MRA 9A5E -11 (x2)
204300 -24 2454  F4MRA DD0AM -24 (x3)
212715 -18  877  TF4M F4MRA JN23

60m

UTC    dB Audio  Message
193400 +16  819  F4MRA HA7TM JN97 (x3)

10m

UTC    dB Audio  Message
173730  -8  847  F4MRA SV2CLJ -07 (x2)
114400 -21 1795  F4MRA CN2DX -02

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