JR8BRK — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: QN02

Receiver-side FT8 activity involving JR8BRK, decoded by SO8OO in southeastern Poland. 53 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 11 UTC dates in the available aggregate history. Observed between 2026-09-11 and 2026-11-02.

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 53 FT8 messages attributed to JR8BRK as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (64%), followed by 40 m (36%). Several six-hour UTC windows tied for the largest share (100%), 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 · 34 40m · 19

First attributed message: 2026-09-11
Last attributed message: 2026-11-02 21:33 UTC

Observed FT8 message patterns

Attributed sample: 53 messages
Active dates: 11 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -19 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 27, strong (≥ -8 dB) 7.

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 JR8BRK in decoded directed-looking exchanges:

HA7XL · Hungary ×2 5B4AMX · Cyprus 9A5CW · Croatia A92AE · Bahrain A93MO · Bahrain DK5WL · Fed. Rep. of Germany EA3EDU · Spain EA7ALL · Spain EA8UP · Canary Islands EI9HQ · Ireland EX7CQ · Kyrgyzstan GM0OPS · Scotland

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 JR8BRK

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: QN02 · 39 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,163 km (approx.)
Last such locator decoded: 2026-11-02 21:33 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	JR8BRK S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-07 06:17	10m	- / -13	EP2AES	-20 / -	2	Partial capture
11-05 21:47	40m	- / -	DL8RWO	+2 / -	2	Partial capture
11-05 20:33	80m	- / -18	OE8DDX	+16 / -	2	✓ Closing fragment
11-02 21:32	80m	-12 / -	OD5ZZ	- / -	3	Partial capture
11-02 20:35	80m	- / -25	S53R	+20 / -	2	✓ Closing fragment
10-26 19:50	80m	- / -	RT6C	+7 / -	2	Partial capture
10-25 19:17	80m	- / -19	UA2FF	+13 / -	3	✓ Closing fragment
10-24 20:43	80m	- / -14	UW5KW	+9 / -	4	Partial capture
10-24 19:59	80m	- / -	YL3KZ	-4 / -	2	Partial capture
10-24 19:55	80m	- / -	R3HH	-2 / -	2	Partial capture
10-24 19:52	80m	- / -18	SV8JE	+12 / -	3	✓ Closing fragment
10-24 19:52	80m	- / -	OK1XV	+2 / -	4	Partial capture
10-24 19:50	80m	- / -23	LY1DY	+14 / -	4	✓ Closing fragment
10-24 19:19	80m	- / -8	UA4FKT	+10 / -	3	✓ Closing fragment
10-24 19:17	80m	- / -20	RU3T	+3 / -	3	✓ Closing fragment
10-24 19:17	80m	- / -9	UR3HC	-5 / -	3	✓ Closing fragment
10-23 21:23	80m	- / -	RA3ZH	-4 / -	3	Partial capture
10-23 21:21	80m	-18 / -8	4O4A	+9 / -9	10	✓ Full exchange observed
10-22 18:15	80m	- / -16	RU9CK	-5 / -	2	Partial capture
10-22 18:15	80m	- / -19	S59A	+20 / -	2	✓ Closing fragment
10-20 22:03	40m	- / -	CT2HSM	-16 / -	3	Partial capture
10-20 22:02	40m	- / -	LZ1GC	-8 / -	3	Partial capture
10-19 22:11	40m	- / -25	IK5SRB	-8 / -	7	✓ Closing fragment
10-18 21:30	80m	- / -16	IZ3ENH	+15 / -	2	Partial capture
10-18 20:56	80m	- / -8	DK7ZT	-6 / -	3	Partial capture
10-18 20:52	80m	-14 / -12	S52D	+16 / -	3	Partial capture
10-18 20:38	80m	-12 / -16	HA7XL	+11 / -	5	✓ Closing observed
10-18 20:32	80m	-8 / -	ON6AA	-1 / -	2	✓ Closing observed
10-18 20:29	80m	-10 / -	F6CTT	-13 / -	13	✓ Closing observed
10-17 16:42	40m	- / -5	RW6HPS	-12 / -	2	Partial capture
10-16 19:32	40m	- / -	RZ4FWA	-15 / -	3	Partial capture
10-15 19:17	40m	- / -15	LY5J	-5 / -	2	Partial capture
10-15 19:12	40m	- / -12	IW0BSQ	-6 / -	5	Partial capture
10-14 20:15	80m	- / -16	EW6BZ	+3 / -	2	✓ Closing fragment
10-14 20:12	80m	- / -14	RO2X	-6 / -	5	✓ Closing fragment
10-14 20:00	80m	- / -	RO2X	-5 / -	2	Partial capture
10-14 19:54	80m	- / -	RK6OQ	-6 / -	5	Partial capture
10-14 19:53	80m	- / -	RO2X	-5 / -	3	Partial capture
10-14 19:31	80m	- / -18	HA5OV	+2 / -	2	✓ Closing fragment
10-13 20:51	80m	- / -	UX1AA	-14 / -	6	Partial capture
10-13 20:35	80m	- / -	UX1AA	-4 / -	5	Partial capture
10-13 20:30	80m	- / -	UX1AA	-1 / -	3	Partial capture
10-13 20:26	80m	- / -	UX1AA	+7 / -	3	Partial capture
10-13 20:08	80m	- / -15	EW6BZ	+2 / -	2	Partial capture
10-13 19:40	80m	- / -	UX1AA	-12 / -	3	Partial capture
10-12 19:30	80m	- / -	RX3DTN	-9 / -	2	Partial capture
10-12 19:26	80m	-16 / -	PI4DX	- / -	4	Partial capture
10-11 20:00	80m	- / -20	4Z5AV	-15 / -	2	Partial capture
10-09 21:03	40m	- / -	DL9KM	-12 / -	5	Partial capture
10-09 21:03	40m	- / -17	IZ5IMD	-6 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
061730 -19 1808  JR8BRK EP2AES -13 (x2)

40m

UTC    dB Audio  Message
221415  -5 2008  JR8BRK IK5SRB 73
215830  -9 2833  JR8BRK A92AE -15
215930  -9 2746  JR8BRK LZ1GC KN22
220200  -5 2832  JR8BRK A92AE RR73
220230 -10 2746  JR8BRK LZ1GC KN22
220300 -15 2138  JR8BRK CT2HSM IN50
220330  -7 2746  JR8BRK LZ1GC KN22
220330 -16 2138  JR8BRK CT2HSM IN50
220400  -7 2746  JR8BRK LZ1GC KN22
220400 -18 2139  JR8BRK CT2HSM IN50
192800  +3 2483  JR8BRK SV9GPV RR73
193130 -16 2150  JR8BRK IW2DNI JN45
215300 -18 1071  JR8BRK 5B4AMX RR73
214730  +0 2641  JR8BRK DL8RWO JN58 (x2)

80m

UTC    dB Audio  Message
191745 +15 1189  JR8BRK UA2FF -19 (x3)
195045  +8  482  JR8BRK RT6C KN95 (x3)
203545 +19  553  JR8BRK S53R -25 (x2)
213200 -11 2731  OD5ZZ JR8BRK QN02 (x3)
205000  -4 2309  JR8BRK 5B4AMM +04
212800  +2 1652  JR8BRK OK1PI -19
203330 +15 2554  JR8BRK OE8DDX -18 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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