JH7RTQ — 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: QM07

Receiver-side FT8 activity involving JH7RTQ, decoded by SO8OO in southeastern Poland. 99 FT8 messages attributed to this token as transmitter, on 20m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-28.

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 99 FT8 messages attributed to JH7RTQ as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (72%), 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

20m · 99

First attributed message: 2026-06-06
Last attributed message: 2026-08-28 14:26 UTC

Observed FT8 message patterns

Attributed sample: 99 messages
Active dates: 10 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -18 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 49, strong (≥ -8 dB) 24.

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 JH7RTQ in decoded directed-looking exchanges:

D2ACE · Angola DF1DU · Fed. Rep. of Germany DL3OCF · Fed. Rep. of Germany ON4IQ · Belgium 7Z1CZ · Saudi Arabia R2RAU · European Russia

Most frequent locator attributed to JH7RTQ

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: QM07 · 76 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,616 km (approx.)
Last such locator decoded: 2026-08-28 14:26 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	JH7RTQ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 01:41	40m	- / -	NC3S	-11 / -	2	Partial capture
08-28 14:25	20m	-12 / -	RI1FJL	- / -	3	Partial capture
08-28 14:23	20m	-10 / -	TA2PWR	- / -16	2	Partial capture
08-28 14:20	20m	-12 / -	RI1FJL	- / -	2	Partial capture
08-25 14:28	20m	-15 / -	Z21ML	- / -18	2	Partial capture
08-23 13:06	10m	- / -14	DL3OCF	-5 / -	2	✓ Closing fragment
08-23 12:59	10m	- / -10	DF1DU	-11 / -	3	✓ Closing fragment
08-23 12:55	10m	- / -20	ON4IQ	+6 / -	3	✓ Closing fragment
08-23 12:19	20m	- / -11	R2RAU	+2 / -	2	✓ Closing fragment
08-23 11:34	20m	- / -	IK4LZH	+10 / -	4	Partial capture
08-19 23:42	20m	- / -10	7Z1CZ	-14 / -	2	✓ Closing fragment
08-18 12:13	20m	- / -	M0IEP	-14 / -	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
014130 -12 1540  JH7RTQ NC3S FM29 (x2)

20m

UTC    dB Audio  Message
115915  -6  758  JH7RTQ R9JE R+11
121945  +3 1208  JH7RTQ R2RAU -11 (x2)
123545  +4 1204  JH7RTQ DL3RN JN59
142830 -14  873  Z21ML JH7RTQ R-18 (x2)
143415 -15 3103  JH7RTQ VU2FR ML88
143515  +5  778  JH7RTQ TA2EE KM69
142015 -13  653  RI1FJL JH7RTQ QM07 (x2)
142300 -10  409  TA2PWR JH7RTQ QM07 (x2)
142515  -7  409  RI1FJL JH7RTQ QM07 (x3)

10m

UTC    dB Audio  Message
111115 -21 2158  JH7RTQ D2ACE RR73
125515  +2 2600  JH7RTQ ON4IQ JO20 (x3)
125945 -14 2385  JH7RTQ DF1DU JO40 (x3)
130245 -20 1926  JH7RTQ IT9CMZ -12
130645  -5  950  JH7RTQ DL3OCF -14 (x2)
135745 -24 1628  JH7RTQ II7MGXX -08

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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