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.