MB7IRX 4m Information

License details.

Callsign MB7IRX
Transmitter Frequency 70.350 MHz
Receiver Frequency 70.350 MHz
CTCSS Access Tone 82.5Hz on Receive and Transmit
Modes FM-Narrow 2.5KHz deviation
Antenna Dipole
Antenna Height Above Ground 20m
Maximum Antenna ERP 7 dBW, 5W
Responsible Licensee M0NFI

Radio Settings.

MB7IRX 4m gateway is one of the new non-NOV gateways allowed by the licence changes in February 2024.

To use a simplex gateway you need to listen and transmit on the same frequency,  MB7IRX 2m Gateway transmits and receives on 70.350MHz and requires a CTCSS tone of 82.5Hz. 

MB7IRX 4m gateway is permanently linked to HUBNet.

All simplex gateway nodes are licensed for narrow deviation only so please make sure your radios are set to narrow. If you operate your radio in wide deviation mode you could cause distortion and your signal may be dropped by the gateway radio. Leave a gap of four seconds between overs to allow all linked nodes to reset and for anyone else to join in. Before transmitting into a gateway please listen for a while to make sure it's not in use. Two people can use the same gateway to talk with other users but as it's only simplex you will be hearing the other local user directly from their radio to yours.

The tones from the gateway assist with determining who is operating from where.

When you transmit into the repeater and it's connected to another node, as you unkey, the gateway will reply with a morse K (dah-dit-dah) with a higher frequency of 1200Hz.

When you transmit into the repeater and it isn't connected to another node, as you unkey, the gateway will reply with a morse K (dah-dit-dah) with a lower frequency of 800Hz.

When a remote user on the network ends transmission you will hear a morse I ( dit-dit).

Coverage Prediction. 

MB7IRX 4m Gateway Coverage Prediction