WSPR 160m (1.80 - 1.87MHz) band activity data recorded for a 4 day period 26/06/2018 ~ 30/06/2018

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

WSPR Frequency: Dial 1.8366MHz USB (occupied bandwidth 1.8380 - 1.8382 MHz)

Grid location: OF88II

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

RX and TX

SSN (Sun Spot Number): 0

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

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

Antenna#2: 'T" Antenna configuration with T-Match tuner

This exercise was to compare the Multi-band dipole antenna with the same antenna configured as a ’T’ Antenna used for operations on the 160m amateur band.

The main HF antenna is an All Band Doublet feed with ladder line and matched with a T-Match antenna tuner including a 1:4 current balun giving access to all HF band including the 160m band. With a view to get better performance particularly on lower frequency bands this antenna was reconfigured as a type of Marconi ‘T’ Antenna by simple bonding the ladder line in the shack and connecting directly to the T-Match antenna tuner.

This antenna requires a counterpoise to work well and this will achieved at least initially by using the galvanized building roof to serve this purpose.  

Conclusion

While the Marconi ‘T’ Antenna configuration has clear advantages over relatively long distance communication within the 160m band when compared to the All Band Doublet. The Marconi ‘T’ Antenna as I currently have it configured is prone to much greater noise making it worse as a receive antenna when compared to the All Band Doublet.

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

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

Antenna#2: 'T" Antenna configuration with T-Match tuner

VK6YSF WSPR Signal received by: VK2KRR The Rock, NSW Australia

Distance: 2832km

Grid location: QF34mr    

dBm: 37 (5 Watts)

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

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

Antenna#2: 'T" Antenna configuration with T-Match tuner

VK6YSF WSPR Signal received by: VK5MR South Australia

Distance: 1921km

Grid location: PF89kk     

dBm: 37 (5 Watts)

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

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

Antenna#2: 'T" Antenna configuration with T-Match tuner

VK6YSF WSPR Signal received by: VK5PJ South Australia

Distance: 2101km

Grid location: PF95mk     

dBm: 37 (5 Watts)

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

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

Antenna#2: 'T" Antenna configuration with T-Match tuner

VK6YSF WSPR Signal received by: VK6HP West Australia

Distance: 91km

Grid location: OF77ww      

dBm: 37 (5 Watts)

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

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

Antenna#2: 'T" Antenna configuration with T-Match tuner

RECEIVED: VK2EFM

Distance: 3233km

Grid location: QF56pn       

dBm: 37 (5 Watts)

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

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

Antenna#2: 'T" Antenna configuration with T-Match tuner

RECEIVED: VK6HP

Distance: 91km

Grid location: OF77ww        

dBm: 40 (10 Watts)

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Page last revised 05 May, 2025