DH4YM — 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: Fed. Rep. of Germany Most frequent locator attributed to this token: JO30

Receiver-side FT8 activity involving DH4YM, decoded by SO8OO in southeastern Poland. 320 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 23 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-31.

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 320 FT8 messages attributed to DH4YM as the transmitting token by decoded message structure across 23 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (40%), followed by 80 m (38%) and 60 m (15%). The busiest six-hour window was 16:00-22:00 UTC, containing 46% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

320

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 120 60m · 47 40m · 129 20m · 21 10m · 3

First attributed message: 2026-06-07
Last attributed message: 2026-10-31 07:36 UTC

Observed FT8 message patterns

Attributed sample: 320 messages
Active dates: 23 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -21 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 92, moderate (-15 to -9 dB) 146, strong (≥ -8 dB) 82.

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 DH4YM in decoded directed-looking exchanges:

RI1FJL · Franz Josef Land ×2 Z62NS · Republic of Kosovo ×2 MM0KQC · Scotland ×2 EG2FPA · Spain F4ACR · France K1BMW · United States LA8MGA · Norway TA1CQ · European Turkey TA6MMI · Asiatic Turkey 9A3AUH · Croatia DA1VA · Fed. Rep. of Germany DD3VV · Fed. Rep. of Germany

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 DH4YM

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: JO30 · 168 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,053 km (approx.)
Last such locator decoded: 2026-10-31 07:35 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	DH4YM S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-31 07:35	60m	-8 / -2	M0IOW	-14 / -19	4	✓ Full exchange observed
10-31 07:34	60m	-7 / +2	PA2PF	-16 / +10	5	✓ Full exchange observed
10-31 07:32	60m	-5 / +6	ON8LX	-6 / +10	5	✓ Full exchange observed
10-31 07:27	80m	- / +3	DK6WH	-12 / -	3	✓ Closing fragment
10-31 07:25	80m	-16 / -9	DM2GG	-3 / +1	4	✓ Full exchange observed
10-31 07:16	80m	- / +7	DO1FZL	-9 / -	3	✓ Closing fragment
10-31 07:05	80m	-17 / -6	DA6OOM	-18 / -	3	✓ Closing observed
10-31 07:02	80m	-19 / -1	F4EGM	-11 / -	4	✓ Closing observed
10-31 07:00	80m	-22 / +7	DO2NM	-2 / -	4	✓ Closing observed
10-31 06:57	80m	-24 / -5	DO1OAS	-11 / -15	4	✓ Full exchange observed
10-31 06:54	80m	-17 / -3	F4GUK	0 / -	5	✓ Closing observed
10-31 06:52	80m	- / 0	IU2THY	-1 / -	4	Partial capture
10-31 06:50	40m	- / -9	RN1TV	+1 / -	2	Partial capture
10-09 22:06	40m	- / -9	EX7CQ	-7 / -	2	✓ Closing fragment
10-09 22:04	40m	- / -18	UR9QQ	-18 / -	3	✓ Closing fragment
10-09 20:55	80m	-5 / +3	DB6LL/P	+1 / -	6	Partial capture
10-09 20:50	80m	-8 / -9	DH1KJ	+10 / -3	5	✓ Full exchange observed
10-09 20:44	80m	-4 / -3	DO1ID	+12 / +9	8	✓ Full exchange observed
10-03 17:19	80m	-8 / -1	OE5SMJ	-12 / -	4	✓ Closing observed
10-03 17:18	80m	- / -14	RV3X	0 / -	2	✓ Closing fragment
10-03 17:15	80m	-12 / +7	DL2PKK	-7 / +10	5	✓ Full exchange observed
10-03 17:01	80m	- / -8	II5GG	-2 / -	2	✓ Closing fragment
10-03 16:58	80m	-24 / -	SA6DST	-7 / -	2	✓ Closing observed
10-03 16:55	80m	-22 / -1	DO7AGN	-10 / +10	6	✓ Full exchange observed
10-03 16:50	80m	-9 / -14	EW2ZC	+10 / +8	6	✓ Full exchange observed
10-03 16:46	80m	-8 / -	9V1YC	- / -	2	Partial capture
10-03 16:44	80m	-9 / -16	DL4DP	-6 / -4	5	✓ Full exchange observed
10-03 16:42	80m	-8 / +7	DO5KHR	-10 / -11	4	✓ Full exchange observed
10-03 16:39	80m	-9 / +4	DC6NS	-5 / -6	5	✓ Full exchange observed
10-03 16:34	80m	-14 / -	DH0ZAL	- / -20	2	✓ Closing fragment
10-03 16:29	80m	-14 / -	TF4M	- / -15	3	✓ Closing fragment
10-03 16:26	80m	-13 / -	DK6IF	+5 / -	2	✓ Closing observed
10-03 16:22	80m	-8 / -2	DO2DLE	-14 / +5	4	✓ Full exchange observed
10-03 14:26	40m	-8 / -	G7SLB	- / -	2	Partial capture
10-03 14:25	40m	-12 / -	LA5ZUA	- / -3	3	✓ Closing fragment
09-27 16:06	40m	-13 / -	FR4KM/P	- / +1	3	Partial capture
09-27 16:05	40m	-14 / -1	PD1FL	-11 / +1	4	✓ Full exchange observed
09-27 15:20	40m	- / -	DF6CZ	+1 / -	2	✓ Closing fragment
09-27 15:16	40m	-19 / -1	DJ2CR	-12 / -	3	✓ Closing observed
09-27 13:20	40m	- / -7	9A3AUH	-3 / -	5	✓ Closing fragment
09-27 13:20	40m	- / -15	EU1AFX	-17 / -	3	✓ Closing fragment
09-26 14:44	40m	- / -8	DD3VV	-12 / -	2	✓ Closing fragment
09-26 14:33	40m	- / +6	HB9ELE	+2 / -	2	✓ Closing fragment
09-26 14:20	40m	- / -4	DL9KM	-4 / -	3	✓ Closing fragment
09-26 14:11	40m	- / -10	DD5DD	-13 / -	3	✓ Closing fragment
09-26 10:38	40m	- / -15	DG3YEV	-15 / -	2	✓ Closing fragment
09-26 06:14	80m	- / +2	DF0AWG	-6 / -	2	✓ Closing fragment
09-26 06:09	80m	- / -	DO5PY	-10 / -	6	Partial capture
09-26 06:04	80m	-22 / -	DG1FK	+1 / -	5	✓ Closing observed
09-26 05:58	80m	- / -	DO5PY	-8 / -	9	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
073230  -4 1129  ON8LX DH4YM JO30
073245  -5 1396  DH4YM ON8LX +06
073300  -3 1129  ON8LX DH4YM R+10
073315  -6 1396  DH4YM ON8LX RR73
073330  -7 1129  ON8LX DH4YM 73
073400  -6 1129  PA2PF DH4YM JO30
073415 -19 1344  DH4YM PA2PF +02
073430  -4 1129  PA2PF DH4YM R+10
073445 -14 1344  DH4YM PA2PF RR73
073500 -11 1129  PA2PF DH4YM 73
073530  -7 1129  M0IOW DH4YM JO30
073545 -14 1130  DH4YM M0IOW -02
073600  -7 1129  M0IOW DH4YM R-19 (x2)

80m

UTC    dB Audio  Message
071715  -9 1064  DH4YM DO1FZL R+07 (x2)
071930 -21 1656  CQ DH4YM JO30 (x5)
072330 -22 1656  DO1EA DH4YM 73
072515  +1 1551  DH4YM DM2GG JO51
072530 -16 1462  DM2GG DH4YM +01
072545  -2 1551  DH4YM DM2GG R-09 (x2)
072745  -8 1382  DH4YM DK6WH JO50 (x3)

40m

UTC    dB Audio  Message
142530 -13  872  LA5ZUA DH4YM R-03 (x2)
142645 -16 1346  DH4YM OH3MB KP20
142645  -7  872  G7SLB DH4YM JO30 (x2)
220245 -19 1509  BG0FQU DH4YM JO30
220315 -19 1396  CQ DH4YM JO30
220400 -24 1396  DH4YM UR9QQ R-18 (x3)
220630 -10 1717  DH4YM EX7CQ -09 (x2)
220845 -15 2493  VJ6X DH4YM JO30
065030  +1  639  DH4YM RN1TV -09 (x2)

20m

UTC    dB Audio  Message
062430  -8  989  NL8F DH4YM JO30
062700 -13  841  AH6HY DH4YM JO30 (x4)
175945 -10 2466  RI1FJL DH4YM RR73 (x2)
075130 -11  781  DH4YM Z62NS +06 (x2)
141500 -16 1809  LA8MGA DH4YM 73
170845 -15 2512  EP2AES DH4YM JO30 (x5)

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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