OH7DFM — 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: Finland Most frequent locator attributed to this token: KP10

Receiver-side FT8 activity involving OH7DFM, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-08-15 and 2026-10-22.

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 26 FT8 messages attributed to OH7DFM as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 80 m (31%) and 60 m (15%). Several six-hour UTC windows tied for the largest share (69%), 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 · 8 60m · 4 40m · 14

First attributed message: 2026-08-15
Last attributed message: 2026-10-22 15:12 UTC

Observed FT8 message patterns

Attributed sample: 26 messages
Active dates: 8 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -20 to -8 dB
Recurring-pattern threshold: Met

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

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 OH7DFM in decoded directed-looking exchanges:

GM3JIM · Scotland YO6LM · Romania G4DBW · England HB9ELE · Switzerland RL2F · Kaliningrad SQ8LE · Poland 9A4ZM · Croatia DL1AOB · Fed. Rep. of Germany 9A5E · Croatia DO4TYW · Fed. Rep. of Germany OH5KNL · Finland RA2FU · Kaliningrad

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 OH7DFM

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: KP10 · 8 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,177 km (approx.)
Last such locator decoded: 2026-10-22 15:12 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	OH7DFM S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 15:11	40m	-12 / -	BU2FF	- / -	2	Partial capture
10-17 06:38	40m	- / -	DG4YT	-15 / -	2	Partial capture
10-17 06:33	40m	- / -	DG4YT	-16 / -	4	Partial capture
10-17 06:30	40m	- / -	DG4YT	-11 / -	2	Partial capture
10-10 09:16	40m	-19 / -9	SQ5ANT	-11 / -4	3	Partial capture
10-07 16:09	40m	- / -7	HB9ELE	+3 / -	2	✓ Closing fragment
10-07 16:03	60m	-20 / -11	9A4ZM	+3 / -2	6	✓ Full exchange observed
10-07 16:01	60m	-20 / -1	DL1AOB	-3 / -2	4	✓ Full exchange observed
10-06 16:50	80m	- / -13	DO4TYW	-18 / -	2	✓ Closing fragment
10-06 16:46	80m	- / -	R2AL	-13 / -	2	Partial capture
10-03 16:49	40m	-18 / -7	RL2F	-14 / -9	4	✓ Full exchange observed
10-03 08:20	40m	- / -7	G4DBW	-14 / -	2	✓ Closing fragment
09-30 17:57	80m	-12 / +5	OH5KNL	+8 / +1	3	✓ Full exchange observed
09-30 17:53	80m	-10 / -8	RA2FU	+4 / -7	5	✓ Full exchange observed
09-25 20:01	80m	-16 / -9	9A5E	+1 / -	7	✓ Closing observed
09-25 19:59	80m	-13 / -13	Z62NS	-4 / -2	4	✓ Full exchange observed
09-22 13:25	40m	-15 / -	RI1FJZ	- / -20	3	Partial capture
09-22 11:47	40m	-8 / -	RI1FJZ	- / -16	2	Partial capture
08-15 16:04	40m	- / +6	SQ8LE	-12 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
161000  +4  742  OH7DFM HB9ELE RR73 (x2)
091615 -20 1950  SQ5ANT OH7DFM KP10
091630 -11 1949  OH7DFM SQ5ANT -09
091645 -18 1950  SQ5ANT OH7DFM R-04
063015 -12 1201  OH7DFM DG4YT JO31 (x8)
151130 -16 2271  BU2FF OH7DFM KP10 (x2)

10m

UTC    dB Audio  Message
100715 -22 1885  OH7DFM F6HRP -16

60m

UTC    dB Audio  Message
160130  -4 1424  OH7DFM DL1AOB -01
160145 -19 1423  DL1AOB OH7DFM R-02
160200  -2 1424  OH7DFM DL1AOB RR73
160245 -20 1424  DL1AOB OH7DFM RR73
160300  +0 1419  OH7DFM 9A4ZM JN86 (x2)
160345 -21 1424  9A4ZM OH7DFM -02
160400  +2 1419  OH7DFM 9A4ZM R-11
160415 -19 1423  9A4ZM OH7DFM RR73
160430  +6 1419  OH7DFM 9A4ZM 73

80m

UTC    dB Audio  Message
175315  -9 1201  RA2FU OH7DFM KP10
175330  +4 1201  OH7DFM RA2FU -08
175415 -11 1201  RA2FU OH7DFM R-07 (x3)
175630  +2 1196  OH7DFM 9A4ZM JN86
175730  +7 2654  OH7DFM OH5KNL +05
175745 -12 2653  OH5KNL OH7DFM R+01
175800  +9 2654  OH7DFM OH5KNL RR73
164615 -23 1503  OH7DFM R7DX KN84
164615 -23 1666  OH7DFM R2AL KO85 (x2)
164930  -9  684  OH7DFM DO3ME JO31
165000 -16 1290  OH7DFM DO4TYW -13 (x2)

20m

UTC    dB Audio  Message
100715 -20 1950  OH7DFM RN6MA +02
131100 -11 2521  OH7DFM YO6LM RR73
131230 -12  978  OH7DFM GM3JIM RR73
134330  -7 2662  OH7DFM EG2FPA -10

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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