ARRL

28MHz Reference Circuit

High End 10 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)

28.3-29.7

Channel Spacing

Random

Information Rate

speech

Emission Type(s)

2K50J3E

Transmitter Power (dBW)

31.7

Transmission Line Loss (dB)

Transmit: .7                    Receive: 0.7

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

21

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

52

Receiver IF Bandwidth

2500 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-158

Receiver Signal-to-Noise Ratio (dB)

+6

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

To be determined

Availability Target %

 

Maximum Path Length (km)

 

 

Popular band for stacked yagis on rotating towers.

 

 

Typical 10M SSB contest station

 

 

Characteristics

 

Values

Frequency Band (MHz)

28.3-29.7

Channel Spacing

Random

Information Rate

speech

Emission Type(s)

2K50J3E

Transmitter Power (dBW)

31.7

Transmission Line Loss (dB)

Transmit: .9                  Receive: 0.9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

16

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

46.8

Receiver IF Bandwidth

2500 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-158

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 10 M CW contest station

 

Characteristics

 

Values

Frequency Band (MHz)

28.0-28.3

Channel Spacing

Random

Information Rate

10 bit/sec

Emission Type(s)

100HA1A

Transmitter Power (dBW)

31.7

Transmission Line Loss (dB)

Transmit: .7                    Receive: 0.7

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

21

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

52

Receiver IF Bandwidth

CW:100 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-172

Receiver Signal-to-Noise Ratio (dB)

+6

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

To be determined

 

 

Maximum Path Length (km)

 

 

 

 

Typical 10 M SSB Amateur Station

 

The typical SSB amateur station communicates with other SSB using F layer propagation.

 

Characteristics

 

Values

Frequency Band (MHz)

28.3-29.7

Channel Spacing

Random

Information Rate

Speech

Emission Type(s)

2K50J3E

Transmitter Power (dBW)

31.7

Transmission Line Loss (dB)

Transmit: .9                    Receive: 0.9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

14

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

44.8

Receiver IF Bandwidth

SSB:2500 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-158

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

 

 

 

Typical 10 M CW Amateur Station

 

 

Characteristics

 

Values

Frequency Band (MHz)

28.0-28.3

Channel Spacing

Random

Information Rate

10 bit/s

Emission Type(s)

100HA1A

Transmitter Power (dBW)

20

Transmission Line Loss (dB)

Transmit: .9                   Receive: 0.9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

8

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

27.1

Receiver IF Bandwidth

CW:100Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-172

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 10 M Digital Amateur Station

 

 

 

Characteristics

 

Values

Frequency Band (MHz)

28.0-28.2

Channel Spacing

Random

Information Rate

45-1200 bit/sec

Emission Type(s)

Many different types

Transmitter Power (dBW)

31.7

Transmission Line Loss (dB)

Transmit: .7                  Receive: .7

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

21

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

52

Receiver IF Bandwidth

500

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-165

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 10 M Digital Amateur Station

 

 

Characteristics

 

Values

Frequency Band (MHz)

28.0-28.2

Channel Spacing

Random

Information Rate

45-1200 bit/sec, 0-1200 bit/sec worst case

Emission Type(s)

Many different types

Transmitter Power (dBW)

17

Transmission Line Loss (dB)

Transmit: .9                  Receive: .9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

8

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

24.1

Receiver IF Bandwidth

500 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-165

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 10 M SSTV Amateur Station

 

The typical SSTV amateur station exchanges pictures with other stations.

 

Characteristics

 

Values

Frequency Band (MHz)

28.3-29.7

Channel Spacing

Random

Information Rate

.22 to 7.5 frames/sec

Emission Type(s)

2K50J3E

Transmitter Power (dBW)

30

Transmission Line Loss (dB)

Transmit: .9                 Receive: .9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

14

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

43.1

Receiver IF Bandwidth

2500

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-158

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

 

High End 10 M Beacon Amateur Station

 

 

Characteristics

 

Values

Frequency Band (MHz)

28.19-28.225

Channel Spacing

N/A

Information Rate

10 bit/s

Emission Type(s)

50HA1A

Transmitter Power (dBW)

20

Transmission Line Loss (dB)

Transmit:.9

Antenna Polarization

Vertical

Antenna Maximum Gain (dBi)

0

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

19.1

Receiver IF Bandwidth

100 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-172

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 10 M Beacon Amateur Station

 

 

Characteristics

 

Values

Frequency Band (MHz)

28.19-28.225

Channel Spacing

N/A

Information Rate

10 bit/s

Emission Type(s)

50HA1A

Transmitter Power (dBW)

10

Transmission Line Loss (dB)

Transmit:.9

Antenna Polarization

Vertical

Antenna Maximum Gain (dBi)

0

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

9.1

Receiver IF Bandwidth

100 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-172

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 10 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)

28.3-29.7

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)

0

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

3

Receiver IF Bandwidth

2500 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-158

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 10 M FM Amateur Station

 

The typical FM amateur station communicates with other amateur stations using F layer propagation. 

 

Characteristics

 

Values

Frequency Band (MHz)

29.0-29.7

Channel Spacing

20 kHz

Information Rate

Speech

Emission Type(s)

15K0F3E

Transmitter Power (dBW)

17

Transmission Line Loss (dB)

Transmit: .9                    Receive: 0.9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

12

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

28.1

Receiver IF Bandwidth

15 kHz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-150

Receiver Signal-to-Noise Ratio (dB)

+7 dB for 12 dB SINAD

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

To be determined

 

 

Maximum Path Length (km)

Depends on propagation mode

 

 

10M FM Repeater Station

 

Elaborate repeater stations often include 10 meter access.  While difficult to implement at a single site, repeaters for this band are often practical with linked sites.

 

 

Characteristics

 

Values

Frequency Band (MHz)

29.5-29.7

Channel Spacing

20 kHz

Information Rate

Speech

Emission Type(s)

15K0F3E

Transmitter Power (dBW)

17

Transmission Line Loss (dB)

Transmit: .9                    Receive: 0.9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

0

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

16.1

Receiver IF Bandwidth

15 kHz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-150

Receiver Signal-to-Noise Ratio (dB)

+7 dB for 12 dB SINAD

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

To be determined

 

 

Maximum Path Length (km)

Depends on propagation mode

 

 

 

Typical 10M Satellite Downlink

 

 

Characteristics

 

Values

Frequency Band (MHz)

28.0-29.7

Channel Spacing

Random

Information Rate

10 bit/s

Emission Type(s)

100HA1A; 2K50J3E

Transmitter Power (dBW)

7 spread over ten 4 kHz bands

Transmission Line Loss (dB)

Transmit:.0

Antenna Polarization

linear

Antenna Maximum Gain (dBi)

2

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

-1

Receiver IF Bandwidth

100 Hz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-172’-158

Receiver Signal-to-Noise Ratio (dB)

+1;+6

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

To be determined

 

 

Maximum Path Length (km)

depends on propagation mode

 

 

Typical 10 M AM station

 

 

Characteristics

 

Values

Frequency Band (MHz)

29.0-29.2

Channel Spacing

Random

Information Rate

Speech

Emission Type(s)

6K0A3E

Transmitter Power (dBW)

17

Transmission Line Loss (dB)

Transmit: .9                    Receive: 0.9

Antenna Polarization

Horizontal

Antenna Maximum Gain (dBi)

12

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

28.1

Receiver IF Bandwidth

6 kHz

Receiver Noise Figure (dB)

7

Receiver System Noise (dBW)

-155

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