WSPR 15m (21.000 - 21.450 MHz) band activity data recorded for a 24 hour period on the 06 ~ 09/11/2017

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Data from the WSPR web site relating to monitoring and transmission from VK6YSF Northam Western Australia.

WSPR Frequency: Dial 21.0946 MHz USB (occupied bandwidth 21.0960 - 21.0962 MHz)

Grid location: OF88II

Local Time = +8:00 hours (0:00 = 8:00AM)

Transmission Power 37 dBm (5Watts)

SSN (Sun Spot Number): 27

Equipment: TS-930 at 5W, Radio computer interface

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

This exercise was to compare the 40m Sloper Antenna with the Doublet Antenna and the L antenna for operations on the 15m amateur band.

Conclusion is that there is no compelling performance deference between the Antennas.

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

DF4UE – Lichtenwald, Germany- RECEIVED BY VK6YSF 

Distance: 13801 km

Grid location: JN48rr

dBm: 30

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

JA5NVN – TOKUSHIMA, Japan - RECEIVED BY VK6YSF 

Distance: 7542 km

Grid location: PM74ec

dBm: 33

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

JG1EIQ – JAPAN - RECEIVED BY VK6YSF 

Distance: 7632 km

Grid location: PM74ns

dBm: 23

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

K0KQ – Jefferson, CO, USA - RECEIVED BY VK6YSF 

Distance: 16118 km

Grid location: DM79dg

dBm: 33

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

ON7KO – VRASENE Belgium - RECEIVED BY VK6YSF 

Distance: 14212 km

Grid location: JO21ce

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

TA4/G8SCU – Alanya Turkey - RECEIVED BY VK6YSF 

Distance: 11694 km

Grid location: KM56ov

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK2GZZ – Sydney, NSW, Australia - RECEIVED BY VK6YSF 

Distance: 3201 km

Grid location: QF56

dBm: 23

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK6PK – WOOROLOO, WA, Australia- RECEIVED BY VK6YSF 

Distance: 37 km

Grid location: OF88ee

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

YB0Z – Jakarta, Indonesia - RECEIVED BY VK6YSF 

Distance: 3013 km

Grid location: OI33jt

dBm: 33

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK6YSF WSPR Signal received by: DK6UG  

Weisenheim, Germany

Distance: 13906km

Grid location: DK6UG

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK6YSF WSPR Signal received by: EA8BFK  

Islas Canarias, Canary Islands, Spain

Distance: 15291 km

Grid location: IL38bo

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK6YSF WSPR Signal received by: JA5NVN   

TOKUSHIMA, Japan

Distance: 7542 km

Grid location: PM74ec

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK6YSF WSPR Signal received by: VK5MR    

Roxby Downs, SA, Australia

Distance: 1921 km

Grid location: PF89kk

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK6YSF WSPR Signal received by: VK6PK  

WOOROLOO, WA, Australia

Distance: 37km

Grid location: OF88ee

dBm: 37

WSPR data has been graphed using Excel. Horizontal axis = UTC Time, Vertical axis = dB below the noise floor.

Antenna:  Sloper Antenna:  Sloper Antenna  -  40 & 15m Bands with T-Match tuner  

                 Doublet Antenna: Multi-band dipole with T-Match tuner and 4-1 Current Balun 

                 L Antenna:           L Antenna with T-Match tuner  

VK6YSF WSPR Signal received by: VU3KAZ   

Bangalore, India

Distance: 6467km

Grid location: MK82tu

dBm: 37

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Page initiated 09 November, 2017

Page last revised 05 November, 2025