ARRL

25MHz Reference Circuit

High End 12 M SSB  station

 

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

24.93-24.99

 

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; Vertical

 

Antenna Maximum Gain (dBi)

 

15

 

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

 

46.1

 

Receiver IF Bandwidth

 

2500 Hz

 

Receiver Noise Figure (dB)

 

7

 

Receiver System Noise (dBW)

 

-156

 

Receiver Signal-to-Noise Ratio (dB)

 

+6

 

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

 

To be determined

 

Availability Target %

 

 

 

Maximum Path Length (km)

 

 

 

 4 el yagi

 

Typical 12 SSB  station

 

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

24.93-24.99

 

Channel Spacing

 

Random

 

Information Rate

 

speech

 

Emission Type(s)

 

2K50J3E

 

Transmitter Power (dBW)

 

31.7

 

Transmission Line Loss (dB)

 

Transmit: .8                    Receive: 0.8

 

Antenna Polarization

 

Horizontal; Vertical

 

Antenna Maximum Gain (dBi)

 

12

 

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

 

42.9

 

Receiver IF Bandwidth

 

2500 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

 

Availability Target %

 

 

 

Maximum Path Length (km)

 

 

 

High End 12 M CW station

 

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

24.89-24.99

 

Channel Spacing

 

Random

 

Information Rate

 

10 bit/sec

 

Emission Type(s)

 

100HA1A

 

Transmitter Power (dBW)

 

31.7

 

Transmission Line Loss (dB)

 

Transmit: .6                    Receive: 0.6

 

Antenna Polarization

 

Horizontal; Vertical

 

Antenna Maximum Gain (dBi)

 

15

 

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

 

46.1

 

Receiver IF Bandwidth

 

CW:100 Hz

 

Receiver Noise Figure (dB)

 

7

 

Receiver System Noise (dBW)

 

-170

 

Receiver Signal-to-Noise Ratio (dB)

 

+1

 

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

 

To be determined

 

 

 

 

 

Maximum Path Length (km)

 

 

 

  Typical 12 M CW Amateur Station

 

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

18.068-18.110

 

Channel Spacing

 

Random

 

Information Rate

 

10 bit/s

 

Emission Type(s)

 

100HA1A

 

Transmitter Power (dBW)

 

20

 

Transmission Line Loss (dB)

 

Transmit: .8                   Receive: 0.8

 

Antenna Polarization

 

Horizontal; Vertical

 

Antenna Maximum Gain (dBi)

 

8

 

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

 

27.2

 

Receiver IF Bandwidth

 

CW:100Hz

 

Receiver Noise Figure (dB)

 

7

 

Receiver System Noise (dBW)

 

-170

 

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 12 M Digital Amateur Station

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

24.89-24.99

 

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: .8               Receive: .8

 

Antenna Polarization

 

Horizontal; Vertical

 

Antenna Maximum Gain (dBi)

 

15

 

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

 

45.9

 

Receiver IF Bandwidth

 

500

 

Receiver Noise Figure (dB)

 

13

 

Receiver System Noise (dBW)

 

-163

 

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 12 M Digital Amateur Station

 

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

24.89-24.99

 

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: .8                  Receive: .8

 

Antenna Polarization

 

Horizontal; Vertical

 

Antenna Maximum Gain (dBi)

 

8

 

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

 

24.2

 

Receiver IF Bandwidth

 

500 Hz

 

Receiver Noise Figure (dB)

 

13

 

Receiver System Noise (dBW)

 

-163

 

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 12 M SSTV Amateur Station

 

 

 The typical SSTV amateur station exchanges pictures with other stations.

 

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

24.93-24.99

 

Channel Spacing

 

Random

 

Information Rate

 

.22 to 7.5 frames/sec

 

Emission Type(s)

 

2K50J3E

 

Transmitter Power (dBW)

 

30

 

Transmission Line Loss (dB)

 

Transmit: .8                Receive: .8

 

Antenna Polarization

 

Horizontal; Vertical

 

Antenna Maximum Gain (dBi)

 

12

 

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

 

41.2

 

Receiver IF Bandwidth

 

2500

 

Receiver Noise Figure (dB)

 

7

 

Receiver System Noise (dBW)

 

-156

 

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 12 M Beacon Amateur Station

 

 

None in operation in the USA, but 100 watt beacons at W6YX and KH6WO are a possibility.

 

 

Characteristics

 

 

 

Values

 

Frequency Band (MHz)

 

24.93

 

Channel Spacing

 

N/A

 

Information Rate

 

10 bit/s

 

Emission Type(s)

 

50HA1A

 

Transmitter Power (dBW)

 

20

 

Transmission Line Loss (dB)

 

Transmit:.8

 

Antenna Polarization

 

Vertical

 

Antenna Maximum Gain (dBi)

 

0

 

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

 

19.2

 

Receiver IF Bandwidth

 

100 Hz

 

Receiver Noise Figure (dB)

 

13

 

Receiver System Noise (dBW)

 

-170

 

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 12 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)

 

24.93-24.99

 

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)

 

-2

 

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

 

1

 

Receiver IF Bandwidth

 

2500 Hz

 

Receiver Noise Figure (dB)

 

7

 

Receiver System Noise (dBW)

 

-156

 

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.