R4HEA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO53

Receiver-side FT8 activity involving R4HEA, decoded by SO8OO in southeastern Poland. 608 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 48 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-10.

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 608 FT8 messages attributed to R4HEA as the transmitting token by decoded message structure across 48 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (66%), followed by 40 m (19%) and 10 m (14%). Most decodes (70%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

608

Messages attributed

UTC dates decoded

143

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 118 20m · 403 10m · 87

First attributed message: 2026-06-06
Last attributed message: 2026-09-10 16:54 UTC

Observed FT8 message patterns

Attributed sample: 608 messages
Active dates: 48 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -19.8 to -0.9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 168, moderate (-15 to -9 dB) 228, strong (≥ -8 dB) 212.

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 R4HEA in decoded directed-looking exchanges:

R3XBB · European Russia ×2 S59A · Slovenia ×2 RX9WN · Asiatic Russia DL1DXX · Fed. Rep. of Germany M7FQH · England EW8DG · Belarus PE1NAO · Netherlands UA9MA · Asiatic Russia R7IA · European Russia DF2KD · Fed. Rep. of Germany RA3TD · European Russia F4MQR · France

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 R4HEA

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: LO53 · 290 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,036 km (approx.)
Last such locator decoded: 2026-09-10 16:50 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	R4HEA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-10 16:53	40m	-8 / -	R3UDU	- / -8	3	Partial capture
09-10 16:50	40m	-6 / -	R3UDU	- / -	2	Partial capture
09-10 16:03	40m	-2 / -	R3WDW	+2 / +4	6	✓ Full exchange observed
09-10 15:58	40m	-5 / -	SP9UOP	- / -10	4	✓ Closing fragment
09-10 15:52	40m	-9 / -7	IQ2AAH	-12 / -18	7	✓ Full exchange observed
09-10 15:50	40m	-3 / -3	PB5DX	-5 / -11	5	✓ Full exchange observed
09-09 18:23	40m	-5 / -	BH3HAC	- / -	4	Partial capture
09-03 18:57	40m	-11 / -13	HA1TIB	-1 / -	4	✓ Closing observed
08-30 15:59	20m	-8 / -	VE7ZAX	- / -	5	Partial capture
08-30 15:57	20m	-5 / -	R1BRS	- / -	3	Partial capture
08-30 15:50	20m	+10 / -	M0LAD	- / -	2	Partial capture
08-30 15:49	20m	-2 / -	R6OV	- / -22	7	✓ Closing fragment
08-28 19:13	20m	-4 / -	II7MGFG	- / -	2	Partial capture
08-28 19:07	20m	+2 / +3	UB4HVA	-3 / -3	6	✓ Full exchange observed
08-27 09:14	10m	- / -	F5LHI	-14 / -	2	✓ Closing fragment
08-26 17:00	20m	-5 / -	LA4VUA	- / -6	2	✓ Closing fragment
08-21 17:37	40m	- / -5	R3XBB	-2 / -	3	✓ Closing fragment
08-21 17:36	40m	-13 / -9	PE1NAO	-13 / -23	3	✓ Full exchange observed
08-21 17:34	40m	-12 / -13	DL1DXX	-1 / 0	4	✓ Full exchange observed
08-21 17:26	40m	-13 / -7	R8CGO	-9 / -	3	✓ Closing observed
08-21 17:25	40m	-14 / -	R3KMI	-14 / -	2	✓ Closing observed
08-21 17:17	20m	+5 / -	F1MGE	- / -22	7	Partial capture
08-21 12:48	20m	-1 / -	JO4JOW	- / -	2	Partial capture
08-21 12:45	20m	-8 / -2	RA3DAD	-5 / +1	4	✓ Full exchange observed
08-21 12:43	20m	-10 / -	VK2LAW	- / -	6	Partial capture
08-20 19:41	20m	-4 / -	OZ/KD0NDU	- / -12	2	Partial capture
08-20 11:15	20m	-20 / -	BH1LKO	- / -	3	Partial capture
08-20 08:31	20m	-8 / -	YV5JLO	- / -	4	Partial capture
08-20 08:08	20m	-8 / -	<...>	- / -5	2	Partial capture
08-18 19:47	40m	-18 / -	PC4D	- / -16	3	Partial capture
08-18 19:35	40m	-18 / -	I8OHQ	- / -19	2	✓ Closing fragment
08-17 15:57	10m	- / +2	UA9MA	-8 / -	2	✓ Closing fragment
08-16 17:30	20m	- / -13	EB1DJ	-10 / -	2	✓ Closing fragment
08-16 17:28	20m	-17 / -2	DG3ACG	-10 / -	3	✓ Closing observed
08-16 17:22	20m	-16 / -	F5TFB	- / -	2	Partial capture
08-15 17:23	20m	+2 / -	TA7ARH	- / -	2	Partial capture
08-15 17:16	20m	0 / -	EA4FL	- / -19	3	✓ Closing fragment
08-15 17:13	20m	+3 / -18	M9OOS	+2 / -15	6	✓ Full exchange observed
08-15 17:11	20m	-2 / -	RU0AKG/M	- / -	2	Partial capture
08-15 15:37	20m	-8 / -	LA5LLA	- / -	12	✓ Closing fragment
08-14 18:16	20m	- / -20	<...>	-16 / -	2	Partial capture
08-14 08:58	20m	-19 / -	E77EA	- / -21	2	✓ Closing fragment
08-14 08:57	20m	-15 / -	ON1PK	- / -10	2	✓ Closing fragment
08-11 18:42	10m	- / -13	YT2TOR	-16 / -	2	Partial capture
08-05 21:09	20m	-8 / -	MM/F4MFS	- / -11	2	Partial capture
08-05 21:02	20m	-14 / -	CX8FB	- / -	5	Partial capture
08-05 19:17	20m	-16 / -	<...>	- / -	4	Partial capture
08-05 19:04	20m	-10 / -	DL7ET	- / -	2	✓ Closing fragment
08-03 10:58	20m	-12 / -	R2YES	-11 / -5	3	✓ Closing observed
08-02 19:53	20m	-9 / -	BI9ALM	- / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
155815 -10  730  SP9UOP R4HEA LO53 (x4)
160330  +4  418  R4HEA R3WDW KO81 (x2)
160415  -6  417  R3WDW R4HEA +04
160430  -6  418  R4HEA R3WDW R+14
160445  +2  417  R3WDW R4HEA RR73
160500  +4  417  R4HEA R3WDW 73
165015  -7 1983  R3UDU R4HEA LO53 (x5)

20m

UTC    dB Audio  Message
155115 +11 2872  M0LAD R4HEA LO53
155145  -1 1639  R6OV R4HEA R-22 (x5)
155730  -2 2103  R1BRS R4HEA LO53 (x3)
155900  -8 1341  VE7ZAX R4HEA LO53 (x5)
160530  -1 2103  R1BRS R4HEA LO53

10m

UTC    dB Audio  Message
080045 -15  998  R4HEA OZ1MAX -07
080245 -20 1307  R4HEA R3XBB -08 (x2)
131600  -5 1110  R4HEA S51KD RRR (x2)
191930  -1 2597  R4HEA RU3UR LO07 (x2)
103315 -15  888  R4HEA M8FQT -12 (x2)
184245 -16 2250  R4HEA YT2TOR -13 (x2)
155745 -10  813  R4HEA UA9MA +02 (x2)
091400 -11 1103  R4HEA F5LHI JN33 (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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