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