Tour 4

3 April 2026, 09:00 (UTC)

Tour passport

Status: Closed Band: 20 m, 40 m, 80 m Submission deadline: 6 April 2026, 21:00 UTC

Season 1.2026

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Participants 6 total / 4 PRO / 2 Hobbyist

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TX SN0FMT Copied

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Locator KO02md Copied

Reference values

True station values at transmission time.

Carrier frequency (20 m) 14068683.43 Hz

Carrier frequency (40 m) 7036683.43 Hz

Carrier frequency (80 m) 3565683.43 Hz

PPS offset 10.7 ms

3rd pulse duration 46.3 ms

PRO ranking PRO

PRO participants ranked by total points.

Rank	Callsign	Points	FREQ Error (Hz)	PULSE Error (ms)	PPS Error (ms)
#1	G4BVE	163.1	+0.374	-0.6	-0.2
#2	KB4XR	148.5	-0.048	-2.3	-0.38
#3	DL5JP	127.7	+0.070	+0.7	-1.7
#4	RU0LL	113.5	+0.120	-0.75	+0.96

Method details — G4BVE

Method summary

Measure frequency offset using SpectrumLab. Scope trigger 1pps from RFzero. Measure pulse width and UTC offset on oscilloscope. Calibration using generator, counter and calibration transmissions.

Method details — KB4XR

Method summary

Record entire 20+ minutes and analyze using SciLab tools. Use Calibration waveform for doppler reference. GPSDO for rig offset. CHU Canada for PPS Was able to use the transmission schedule effectively. THANK YOU for that! About 1.4 Hz of doppler. Noisy in NA as in the previous tours. Makes pulse measurements extremely difficult. Averaging 350 pulse envelopes but even then the pulses are barely distinguishable unless heavily filtered. But then the rise/fall edges are smeared. Rig PPM is corrected in SciLab using CHU pulse times at start and end of test.

Carrier (FREQ)

Rank	Callsign	Points
#1	KB4XR	71.5
#2	DL5JP	54.6
#3	RU0LL	39.4
#4	G4BVE	23.5

Method details — KB4XR

Method summary

Method details — G4BVE

Method summary

Measure frequency offset using SpectrumLab. Scope trigger 1pps from RFzero. Measure pulse width and UTC offset on oscilloscope. Calibration using generator, counter and calibration transmissions.

Pulse (PULSE)

Rank	Callsign	Points
#1	G4BVE	66.9
#2	DL5JP	51.5
#3	RU0LL	36.5
#4	KB4XR	20.9

Method details — G4BVE

Method summary

Measure frequency offset using SpectrumLab. Scope trigger 1pps from RFzero. Measure pulse width and UTC offset on oscilloscope. Calibration using generator, counter and calibration transmissions.

Method details — KB4XR

Method summary

PPS (PPS)

Rank	Callsign	Points
#1	G4BVE	72.7
#2	KB4XR	56.1
#3	RU0LL	37.6
#4	DL5JP	21.6

Method details — G4BVE

Method summary

Measure frequency offset using SpectrumLab. Scope trigger 1pps from RFzero. Measure pulse width and UTC offset on oscilloscope. Calibration using generator, counter and calibration transmissions.

Method details — KB4XR

Method summary

Hobbyist ranking Hobbyist

Hobbyist participants ranked by total points.

Rank	Callsign	Points	FREQ Error (Hz)	PULSE Error (ms)
#1	DC4HF	82.6	+0.070	-0.3
#2	G0PEB	46.9	-71.053	-0.3

Method details — DC4HF

Method summary

Hello, first submission here. I just did some simple measurements using IC-7300, WSJT-X and Audacity to compare the calibration carrier/pulse with the unknown ones. Averaging was done in mental arithmetic only :-) No PPS measured. I heard all transmissions but used only the 80m run, as it was the cleanest. I try to come back next time with some GPSDO stuff. Cheers...

Carrier (FREQ)

Rank	Callsign	Points
#1	DC4HF	49.1
#2	G0PEB	13.4

Method details — DC4HF

Method summary

Pulse (PULSE)

Rank	Callsign	Points
#1	G0PEB	33.5
#2	DC4HF	33.5

Method details — DC4HF

Method summary

1PPS Offset (informational)

This data is for reference only and does not affect Hobbyist rankings or scoring.

#	Callsign	Measured, ms	Reference, ms	Error, ms
1	G0PEB	12	10.7	+1.3
2	DC4HF	0	10.7	-10.7