High End 75 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) |
3.75-4.0 |
|
Channel Spacing |
Random |
|
Information Rate |
speech |
|
Emission Type(s) |
2K50J3E |
|
Transmitter Power (dBW) |
31.7 |
|
Transmission Line Loss (dB) |
Transmit: .2 Receive: 0.2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
12 |
|
Maximum e.i.r.p. (dBW) |
43.5 |
|
Receiver IF Bandwidth |
2500 Hz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-135 |
|
Receiver Signal-to-Noise Ratio (dB) |
+6 |
|
Maximum Long-Term Interference Power [dB(W/Hz)] |
To be determined |
|
Availability Target % |
|
|
Maximum Path Length (km) |
|
3 element yagi--K3ZO and others. Vertical polarization is sometimes preferred for distant contacts, trading off a lower ERP for a more suitable radiation pattern.
Typical 75M SSB contest station
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.75-4.0 |
|
Channel Spacing |
Random |
|
Information Rate |
speech |
|
Emission Type(s) |
2K50J3E |
|
Transmitter Power (dBW) |
31.7 |
|
Transmission Line Loss (dB) |
Transmit: .2 Receive: 0.2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
8 |
|
Maximum e.i.r.p. (dBW) |
39.5 |
|
Receiver IF Bandwidth |
2500 Hz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-135 |
|
Receiver Signal-to-Noise Ratio (dB) |
+6 |
|
Maximum Long-Term Interference Power [dB(W/Hz)] |
To be determined |
|
Availability Target % |
|
|
Maximum Path Length (km) |
|
Full wave horizontal loop at 50 ft.
High End 80M CW contest station
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.5-3.75 |
|
Channel Spacing |
Random |
|
Information Rate |
10 bit/sec |
|
Emission Type(s) |
100HA1A |
|
Transmitter Power (dBW) |
31.7 |
|
Transmission Line Loss (dB) |
Transmit: .2 Receive: 0.2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
12 |
|
Maximum e.i.r.p. (dBW) |
43.5 |
|
Receiver IF Bandwidth |
CW:100 Hz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-149 |
|
Receiver Signal-to-Noise Ratio (dB) |
+6 |
|
Maximum Long-Term Interference Power [dB(W/Hz)] |
To be determined |
|
|
|
|
Maximum Path Length (km) |
|
Typical 75 M SSB Amateur Station
The typical SSB amateur station communicates with other SSB using F layer propagation.
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.75-4.0 |
|
Channel Spacing |
Random |
|
Information Rate |
Speech |
|
Emission Type(s) |
2K50J3E |
|
Transmitter Power (dBW) |
31.7 |
|
Transmission Line Loss (dB) |
Transmit: .2 Receive: 0.2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
7 |
|
Maximum e.i.r.p. (dBW) |
38.5 |
|
Receiver IF Bandwidth |
SSB:2500 Hz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-135 |
|
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 40 ft
Typical 80M CW Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.5-3.75 |
|
Channel Spacing |
Random |
|
Information Rate |
10 bit/s |
|
Emission Type(s) |
100HA1A |
|
Transmitter Power (dBW) |
20 |
|
Transmission Line Loss (dB) |
Transmit: .2 Receive: 0.2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
7 |
|
Maximum e.i.r.p. (dBW) |
26.8 |
|
Receiver IF Bandwidth |
CW:100Hz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-149 |
|
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 40 ft
High End 80 M Digital Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.5-3.75 |
|
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: .2 Receive: .2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
8 |
|
Maximum e.i.r.p. (dBW) |
39.5 |
|
Receiver IF Bandwidth |
500 |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-142 |
|
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 80M Digital Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.5-3.75 |
|
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: .2 Receive: .2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
7 |
|
Maximum e.i.r.p. (dBW) |
23.8 |
|
Receiver IF Bandwidth |
500 Hz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-142 |
|
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 80 M SSTV Amateur Station
The typical SSTV amateur station exchanges pictures with other stations.
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.75-4.0 |
|
Channel Spacing |
Random |
|
Information Rate |
.22 to 7.5 frames/sec |
|
Emission Type(s) |
2K50J3E |
|
Transmitter Power (dBW) |
30 |
|
Transmission Line Loss (dB) |
Transmit: .2 Receive: .2 |
|
Antenna Polarization |
Horizontal; Vertical |
|
Antenna Maximum Gain (dBi) |
8 |
|
Maximum e.i.r.p. (dBW) |
41.4 |
|
Receiver IF Bandwidth |
2500 |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-145 |
|
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 80 M Beacon Amateur Station
N/A--There don’t appear to be any in operation.
Typical 80 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) |
3.75-4.0 |
|
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) |
-20 |
|
Maximum e.i.r.p. (dBW) |
-17 |
|
Receiver IF Bandwidth |
2500 Hz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-135 |
|
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 80M AM station
|
Characteristics
|
Values
|
|
Frequency Band (MHz) |
3.75-4.0 |
|
Channel Spacing |
Random |
|
Information Rate |
Speech |
|
Emission Type(s) |
6K0A3E |
|
Transmitter Power (dBW) |
31.7 |
|
Transmission Line Loss (dB) |
Transmit: .2 Receive: 0.2 |
|
Antenna Polarization |
Horizontal |
|
Antenna Maximum Gain (dBi) |
8 |
|
Maximum e.i.r.p. (dBW) |
39.5 |
|
Receiver IF Bandwidth |
6 kHz |
|
Receiver Noise Figure (dB) |
13 |
|
Receiver System Noise (dBW) |
-132 |
|
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 |
