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 |