High End 20 M SSB contest station
Competitive contest stations use big antennas in an effort to contact even the smallest and most remote stations.
Stacked yagis in the Antenna book feed with 200 ft of Hardline in a quiet rural location.
Typical 20M SSB contest station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.15-14.35
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
speech
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .6 Receive: 0.6
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
14
|
|
Maximum e.i.r.p. (dBW)
|
46.1
|
|
Receiver IF Bandwidth
|
2500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-145
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+6
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
Availability Target %
|
|
|
Maximum Path Length (km)
|
|
Single 4 element yagi in a typical suburban location. Height primarily affects the vertical pattern but not the maximum gain.
High End 20M CW contest station
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Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.0-14.100
|
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Channel Spacing
|
Random
|
|
Information Rate
|
10 bit/sec
|
|
Emission Type(s)
|
100HA1A
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .4 Receive: 0.4
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
17
|
|
Maximum e.i.r.p. (dBW)
|
48.3
|
|
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 20 M SSB Amateur Station
The typical SSB amateur station communicates with other SSB using F layer propagation.
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.15-14.35
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
Speech
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .6 Receive: 0.6
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
12
|
|
Maximum e.i.r.p. (dBW)
|
43.1
|
|
Receiver IF Bandwidth
|
SSB:2500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-145
|
|
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
|
Legal limit amp and a small tribander like the Force 12 C3 (12’ boom). Tribander has 4.5 dB gain over a dipole.
Typical 20M CW Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.0-14.1
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
10 bit/s
|
|
Emission Type(s)
|
100HA1A
|
|
Transmitter Power (dBW)
|
20
|
|
Transmission Line Loss (dB)
|
Transmit: .5 Receive: 0.5
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
8
|
|
Maximum e.i.r.p. (dBW)
|
27.5
|
|
Receiver IF Bandwidth
|
CW:100Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-159
|
|
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
|
High End 20 M Digital Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.0-14.1
|
|
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: .4 Receive: .4
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
17
|
|
Maximum e.i.r.p. (dBW)
|
48.3
|
|
Receiver IF Bandwidth
|
500
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-152
|
|
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 20M Digital Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.0-14.1
|
|
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: .6 Receive: .6
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
8
|
|
Maximum e.i.r.p. (dBW)
|
24.4
|
|
Receiver IF Bandwidth
|
500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-152
|
|
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 SSTV Amateur Station
The typical SSTV amateur station exchanges pictures with other stations.
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.15-14.35
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
.22 to 7.5 frames/sec
|
|
Emission Type(s)
|
2K50J3E
|
|
Transmitter Power (dBW)
|
30
|
|
Transmission Line Loss (dB)
|
Transmit: .6 Receive: .6
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
12
|
|
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 20 M Beacon Amateur Station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.1
|
|
Channel Spacing
|
N/A
|
|
Information Rate
|
10 bit/s
|
|
Emission Type(s)
|
50HA1A
|
|
Transmitter Power (dBW)
|
20
|
|
Transmission Line Loss (dB)
|
Transmit:.5
|
|
Antenna Polarization
|
Vertical
|
|
Antenna Maximum Gain (dBi)
|
0
|
|
Maximum e.i.r.p. (dBW)
|
19.5
|
|
Receiver IF Bandwidth
|
100 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-159
|
|
Receiver Signal-to-Noise Ratio (dB)
|
+1
|
|
Maximum Long-Term Interference Power [dB(W/Hz)]
|
To be determined
|
|
|
|
|
Maximum Path Length (km)
|
depends on propagation mode
|
Typical 20 M Hand-Held Amateur Station
The typical SSB hand-held amateur station can communicate with other SSB voice amateur stations.
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.15-14.35
|
|
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)
|
-10
|
|
Maximum e.i.r.p. (dBW)
|
-7
|
|
Receiver IF Bandwidth
|
2500 Hz
|
|
Receiver Noise Figure (dB)
|
13
|
|
Receiver System Noise (dBW)
|
-145
|
|
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 20 M AM station
|
Characteristics
|
Values
|
|
Frequency Band (MHz)
|
14.15-14.3
|
|
Channel Spacing
|
Random
|
|
Information Rate
|
Speech
|
|
Emission Type(s)
|
6K0A3E
|
|
Transmitter Power (dBW)
|
31.7
|
|
Transmission Line Loss (dB)
|
Transmit: .5 Receive: 0.5
|
|
Antenna Polarization
|
Horizontal
|
|
Antenna Maximum Gain (dBi)
|
12
|
|
Maximum e.i.r.p. (dBW)
|
43.2
|
|
Receiver IF Bandwidth
|
6 kHz
|
|
Receiver Noise Figure (dB)
|
7
|
|
Receiver System Noise (dBW)
|
-142
|
|
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
|
