RX4HX — 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 RX4HX, decoded by SO8OO in southeastern Poland. 255 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 37 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-11.

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 255 FT8 messages attributed to RX4HX as the transmitting token by decoded message structure across 37 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (60%), followed by 20 m (18%) and 160 m (8%). Most decodes (82%) fell within the six-hour window 14:00-20:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was -3 dB.

Overview

255

Messages attributed

UTC dates decoded

Active 15-min windows

-3 dB

Estimated median S/N

Bands

160m · 20 80m · 154 40m · 19 20m · 45 10m · 17

First attributed message: 2026-06-06
Last attributed message: 2026-09-11 17:25 UTC

Observed FT8 message patterns

Attributed sample: 255 messages
Active dates: 37 UTC dates
Estimated median S/N: -3 dB
Estimated 10th-90th percentile: -11 to +6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 42, strong (≥ -8 dB) 205.

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 RX4HX in decoded directed-looking exchanges:

R50RKZ · European Russia ×2 BG7BVI · China ×2 UB0SMX/P · Asiatic Russia ×2 UA3NFG · European Russia YO4NT · Romania DL6EL · Fed. Rep. of Germany RM4N · European Russia RJ3T · European Russia RN3DDW/P · European Russia R9FFJ · European Russia R3UCC/P · European Russia R3BDQ · European Russia

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 RX4HX

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 · 52 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,036 km (approx.)
Last such locator decoded: 2026-08-27 18:57 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	RX4HX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-11 17:23	80m	+8 / +3	R2DGN	+4 / +2	6	✓ Full exchange observed
09-11 17:22	80m	+9 / -	UA9AJK	-15 / -3	3	✓ Closing observed
09-11 17:22	80m	+8 / -	R5BM/M	- / -12	2	Partial capture
09-11 17:20	80m	+14 / -	II4PAGE	- / -15	3	Partial capture
09-10 15:34	40m	-2 / -	BG7BVI	- / -17	2	✓ Closing fragment
09-10 15:33	40m	0 / -	UB0SMX/P	- / -18	2	✓ Closing fragment
09-02 18:23	80m	-4 / -	SM1OII	- / -9	2	Partial capture
08-31 19:25	80m	-11 / -	VK2JAS	- / -19	2	Partial capture
08-31 18:49	80m	-6 / -	VK4DAD	- / -15	2	Partial capture
08-31 18:45	80m	-9 / -	VK4DAD	- / -10	3	Partial capture
08-29 19:21	160m	+1 / -	SM5KNV	+4 / -17	3	✓ Full exchange observed
08-27 18:53	80m	-3 / -	RI1FJL	- / -24	6	Partial capture
08-26 13:24	20m	+14 / -	BG7BVI	- / -22	2	✓ Closing fragment
08-26 13:22	20m	+7 / -	UB0SMX/P	- / -21	3	✓ Closing fragment
08-26 13:20	20m	+7 / -	<...>	- / -4	3	Partial capture
08-24 17:14	40m	+1 / -	DH7WW/P	- / -6	3	Partial capture
08-24 17:08	40m	-4 / -1	R7DX	+4 / -	4	✓ Closing observed
08-21 18:38	80m	+4 / -	RC7LX	- / -14	2	✓ Closing fragment
08-21 18:36	80m	+2 / +1	UF4S/P	-10 / 0	5	✓ Full exchange observed
08-14 19:07	80m	+4 / -	R50RKZ	+13 / +9	5	✓ Full exchange observed
08-14 19:02	160m	-10 / +8	R2UZ/P	-13 / -	2	✓ Closing observed
08-14 18:24	80m	+3 / -	R6DOB/7	- / -12	7	Partial capture
08-11 15:51	20m	-4 / -	<...>	-15 / -2	2	Partial capture
08-08 19:16	160m	-6 / -	RJ3T	- / -18	2	✓ Closing fragment
08-08 19:13	160m	-5 / -	UA9CMN	- / -2	5	✓ Closing fragment
08-07 18:38	80m	-4 / -	UB6OAK	-22 / -11	4	✓ Closing observed
08-07 18:37	80m	-7 / -	RA9FDR	- / -13	2	✓ Closing fragment
08-07 18:35	80m	-6 / +1	SV1EKI	-4 / -19	5	✓ Full exchange observed
08-07 18:34	80m	-4 / -	R1ZH	-17 / -9	3	✓ Closing observed
08-06 17:44	80m	-5 / -	<...>	- / +3	2	Partial capture
08-06 17:42	80m	0 / -	RT25KS	- / +3	4	Partial capture
08-04 19:33	80m	-9 / -	<...>	- / -	2	Partial capture
08-04 17:49	40m	-6 / -	<...>	- / +1	2	Partial capture
08-01 18:44	80m	-4 / -	UB0SMX/P	- / -4	3	Partial capture
08-01 18:43	80m	+2 / -	<...>	- / -2	3	Partial capture
07-28 19:05	40m	- / +1	RA3AV	-13 / -	3	✓ Closing fragment
07-28 19:03	40m	-19 / -	RC6OZ	-12 / -	3	✓ Closing observed
07-20 19:48	160m	-14 / -5	R2EA	0 / -21	4	✓ Full exchange observed
07-20 19:42	80m	+4 / -	RW3RN	+2 / +2	5	✓ Full exchange observed
07-17 19:02	20m	+11 / -5	<...>	-10 / -22	4	Partial capture
07-16 18:44	80m	-8 / -	UB0SMX/P	- / -14	2	Partial capture
07-14 19:12	20m	+4 / -	R3NC	- / -11	2	✓ Closing fragment
07-13 19:48	160m	- / -	R6ML	-5 / -	3	Partial capture
07-13 19:46	160m	-5 / -	R90PNR	- / -13	2	✓ Closing fragment
07-13 19:44	160m	-5 / -1	R2HB	-4 / -17	4	✓ Full exchange observed
07-13 19:43	160m	-5 / -	R90PNR	- / -	3	Partial capture
07-13 18:20	40m	-12 / -	RI1PC	- / -14	2	Partial capture
07-13 13:28	20m	0 / +1	R2PA	-16 / -	3	✓ Closing observed
07-13 13:27	20m	-3 / -	R8CGE	- / -4	2	✓ Closing fragment
07-13 13:26	20m	-1 / -4	IK2ZJR	+8 / -4	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
190230  -7 2531  VK5XDX RX4HX -11
172000 +14  503  II4PAGE RX4HX -15 (x3)
172200  +8 2580  R5BM/M RX4HX -12
172215 -15 2129  RX4HX UA9AJK LO93
172230  +8 2580  R5BM/M RX4HX R-13
172315  -6 2732  RX4HX R2DGN KO94
172330  +6 2580  UA9AJK RX4HX -03 (x2)
172415  +6 2755  RX4HX R2DGN KO94
172430  +7 2579  R2DGN RX4HX +02
172445  +6 2755  RX4HX R2DGN R+03
172500 +10 2580  R2DGN RX4HX RR73
172515 +11 2755  RX4HX R2DGN 73

40m

UTC    dB Audio  Message
174915  -5 2764  <...> RX4HX LO53 (x2)
170530  -1 2413  D2ACE RX4HX -18
170845  +0 1885  RX4HX R7DX KN84 (x2)
170930  -4 2413  R7DX RX4HX RR73
170945  +8 1886  RX4HX R7DX 73
171445  +1 2738  DH7WW/P RX4HX -06 (x3)
171645  -6  780  RV7B/9 RX4HX -10
153315  +0 2767  UB0SMX/P RX4HX -18 (x2)
153415  -1 2767  BG7BVI RX4HX R-17 (x2)

160m

UTC    dB Audio  Message
193100  +0 2397  RX4HX R50RKZ RR73
191315  -7 2481  UA9CMN RX4HX LO53 (x5)
191615  -6 2481  RJ3T RX4HX -18 (x2)
190200 -13 2116  RX4HX R2UZ/P R+08
190215 -10 2540  R2UZ/P RX4HX RR73
190230 -12 2116  RX4HX RR73; RA6LTD <...> -20
192100  +1 2714  SM5KNV RX4HX -17
192115  +4  779  RX4HX SM5KNV R+17
192130  +1 2713  SM5KNV RX4HX RR73
193700 -20 1252  RX4HX RN1ON R-03

20m

UTC    dB Audio  Message
190215 +10 2817  <...> RX4HX LO53
190230 -10 2548  RX4HX <...> -05
190245 +12 2817  <...> RX4HX R-22 (x3)
155130 -15 2170  RX4HX <...> R+13
132000  +2 2802  <...> RX4HX LO53 (x3)
132215 -20 3119  RX4HX EA4IFO IN80
132245  +4 2605  UB0SMX/P RX4HX LO53 (x3)
132415 +17 2605  BG7BVI RX4HX R-22 (x2)

10m

UTC    dB Audio  Message
182730 -18 2070  RX4HX RT3K RR73
184700  -8 1256  RX4HX R7NO RR73
184730  +5 2872  RX4HX D44EC R-02
184800  +1 2872  RX4HX RR73; DL1BJL <...> -18
180630 -11 2309  RA1PO RX4HX -05 (x3)
181000 -13  320  RV3YR RX4HX -12 (x2)
182045 +13 2663  RX4HX RC6OG KN98 (x6)

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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