YU7MA — 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: Serbia Most frequent locator attributed to this token: KN05

Receiver-side FT8 activity involving YU7MA, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-06-28.

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 17 FT8 messages attributed to YU7MA as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -5 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

20m · 17

First attributed message: 2026-06-28
Last attributed message: 2026-06-28 20:29 UTC

Observed FT8 message patterns

Attributed sample: 17 messages
Active dates: 1 UTC dates
Estimated median S/N: -5 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 11.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with YU7MA in decoded directed-looking exchanges:

DA2DA · Fed. Rep. of Germany DF5KX · Fed. Rep. of Germany DN9CHV · Fed. Rep. of Germany F5THL · France IU0MBJ · Italy R9FFZ · European Russia RU3FA · European Russia PD3LKN · Netherlands TA2EE · Asiatic Turkey DL3KVR · Fed. Rep. of Germany F4GRW · France

Most frequent locator attributed to YU7MA

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: KN05 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 497 km (approx.)
Last such locator decoded: 2026-06-28 20:27 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	YU7MA S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-24 07:49	10m	- / -8	R9FFZ	-21 / -	4	✓ Closing fragment
09-27 20:09	40m	- / -25	F4GRW	-2 / -	2	✓ Closing fragment
09-22 19:17	40m	- / -14	DL3KVR	+8 / -	2	✓ Closing fragment
08-30 12:33	20m	- / -	PD3LKN	-6 / -	2	✓ Closing fragment
08-28 18:13	20m	- / -18	TA2EE	-12 / -	5	✓ Closing fragment
08-28 17:46	20m	- / -3	BG7BMG	-18 / -	2	Partial capture
08-24 18:54	80m	- / -	SP3IPA	+4 / -	10	Partial capture
08-20 18:24	10m	- / +8	DF5KX	-10 / -	2	✓ Closing fragment
08-16 08:40	10m	- / -	DN9OPA	-12 / -	7	Partial capture
08-16 08:33	10m	- / -5	DA2DA	-9 / -	2	✓ Closing fragment
08-16 08:08	10m	- / -	DN9OPA	-3 / -	5	Partial capture
08-16 08:02	10m	- / -5	RU3FA	-11 / -	2	✓ Closing fragment
08-09 13:48	10m	- / -5	F5THL	-4 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
084400 -11 2394  YU7MA DN9OPA JN38
094145 -21 1323  YU7MA DC5IU R-15
094615 -12 2392  YU7MA DN9OPA JN38
094700 -18 1081  YU7MA IU0MBJ RR73
154430 -11  905  YU7MA DN9SHA -21
155530 -18 1774  YU7MA DO1ANB -14
182430 -11  909  YU7MA DF5KX +08 (x2)
082045 -12  981  YU7MA R6DWD -18
100830 -20 1697  YU7MA PD1ALW -19
074930 -21 1666  YU7MA R9FFZ LO89 (x4)
075630 -20 2084  YU7MA BG4UCZ PM02

40m

UTC    dB Audio  Message
191745 +12  520  YU7MA DL3KVR -14 (x2)
200945  +0 1369  YU7MA F4GRW -25 (x2)

20m

UTC    dB Audio  Message
174600 -17 2345  YU7MA BG7BMG -03 (x2)
181315 -11  532  YU7MA TA2EE KM69 (x5)
123330  -5 1302  YU7MA PD3LKN JO22
123400 -11 2562  YU7MA IW5ALZ JN53
123430  -7 1302  YU7MA PD3LKN 73
123430  -7 1565  YU7MA DB1EF JO41

80m

UTC    dB Audio  Message
185415  +4  993  YU7MA SP3IPA JO82 (x10)

CW

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

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee