High End 40 M SSB contest station
Competitive contest stations use big antennas in an effort to contact even the smallest and most remote stations.
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.0-7.3 Receive, 7.075-7.1 and 7.15-7.3 Transmit
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
speech
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: 0.3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
15
|
|
Maximum e.i.r.p. (dBW)
|
46.4
|
|
Receiver IF Bandwidth
|
2500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-142
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+6
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
Availability Target %
|
|
|
Maximum Path Length (km)
|
|
Big horizontally yagis are somewhat common--probably more common than vertical arrays among the elite contest stations.
Typical 40M SSB contest station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.0-7.3 Receive, 7.075-7.1 and 7.15-7.3 Transmit
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
speech
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: 0.3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
12
|
|
Maximum e.i.r.p. (dBW)
|
43.4
|
|
Receiver IF Bandwidth
|
2500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-142
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+6
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
Availability Target %
|
|
|
Maximum Path Length (km)
|
|
Shortened two element yagis are quite popular.
High End 40 CW contest station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.0-7.15
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
10 bit/sec
|
|
Emission Type(s)
|
100HA1A
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: 0.3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
15
|
|
Maximum e.i.r.p. (dBW)
|
46.4
|
|
Receiver IF Bandwidth
|
CW:100 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-156
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+6
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
|
Typical 40 M SSB Amateur Station
The typical SSB amateur station communicates with other SSB using F layer propagation.
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.0-7.3 Receive, 7.075-7.1 and 7.15-7.3 Transmit
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
Speech
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: ..3 Receive: 0.3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
6
|
|
Maximum e.i.r.p. (dBW)
|
37.4
|
|
Receiver IF Bandwidth
|
SSB:2500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-142
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+6
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
Depends on propagation mode
|
Dipole at 60 ft
Typical 40M CW Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.0-7.15
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
10 bit/s
|
|
Emission Type(s)
|
100HA1A
|
|
Transmitter Power (dBW)
|
20
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: 0.3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
6
|
|
Maximum e.i.r.p. (dBW)
|
25.7
|
|
Receiver IF Bandwidth
|
CW:100Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-156
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+1
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
Depends on propgation mode
|
Dipole at 30 ft
High End 40 M Digital Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.0-7.1
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
45-300 bit/sec
|
|
Emission Type(s)
|
Many different types
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: .3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
12
|
|
Maximum e.i.r.p. (dBW)
|
43.4
|
|
Receiver IF Bandwidth
|
500
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-149
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+3
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
Depends on the propagation mode
|
Typical 40 M Digital Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.0-7.1
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
45-300 bit/sec, 0-300 bit/sec worst case
|
|
Emission Type(s)
|
Many different types
|
|
Transmitter Power (dBW)
|
17
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: .3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
6
|
|
Maximum e.i.r.p. (dBW)
|
22.7
|
|
Receiver IF Bandwidth
|
500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-149
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+3
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
Depends on propagation mode
|
Typical 40 M SSTV Amateur Station
The typical SSTV amateur station exchanges pictures with other stations.
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.15-7.3
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
.22 to 7.5 frames/sec
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
30
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: .3
|
|
Antenna Polarization
|
Horizontal; Vertical
|
|
Antenna Maximum Gain (dBi)
|
6
|
|
Maximum e.i.r.p. (dBW)
|
35.7
|
|
Receiver IF Bandwidth
|
2500
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-142
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+30
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
Depends on propagation mode
|
Typical 40 M Beacon Amateur Station
N/A--There don’t appear to be any in operation.
Typical 40 M Hand-Held Amateur Station
The typical SSB hand-held amateur station can communicate with some other SSB voice amateur stations.
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.075-7.1, 7.15-7.3
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
speech
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
3
|
|
Transmission Line Loss (dB)
|
Transmit: .0 Receive: 00
|
|
Antenna Polarization
|
Vertical
|
|
Antenna Maximum Gain (dBi)
|
-15
|
|
Maximum e.i.r.p. (dBW)
|
-12
|
|
Receiver IF Bandwidth
|
2500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-142
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+6
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
Availability Target %
|
|
|
Maximum Path Length (km)
|
|
Mizuho sell these little radios.
Typical 40 M AM station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
7.15-7.3
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
Speech
|
|
Emission Type(s)
|
6K0A3E
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .3 Receive: 0.3
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
6
|
|
Maximum e.i.r.p. (dBW)
|
37.4
|
|
Receiver IF Bandwidth
|
6 kHz
|
|
Receiver Noise Figure (dB)
|
7
|
|
Receiver System Noise (dBW)
|
-139
|
|
Receiver Signal-to-Noise Ratio (dB)
|
10
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
Depends on propagation mode
|
