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.

 

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: .4                    Receive: 0.4

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

17

Maximum e.i.r.p. (dBW)

48.3

Receiver IF Bandwidth

2500 Hz

Receiver Noise Figure (dB)

13

Receiver System Noise (dBW)

-149  (29000 Kelvin background)

Receiver Signal-to-Noise Ratio (dB)

+6

Maximum Long-Term Interference Power [dB(W/Hz)]       

To be determined

Availability Target %

 

Maximum Path Length (km)

 

 

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