ARRL

14 MHz Reference Circuit

 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

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

14.0-14.100

 

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