FM

No current amateur digital mode can match the audio quality of a strong clear FM signal. Almost every radio amateur has access to a 2m FM radio which is why it's important we keep a balance between FM repeaters and the newer digitals modes. 

Operating Information

The information below is based on GB3RF but most of our repeaters are controlled and operate in the same way.

As an Allstar controlled repeater, GB3RF is using digital technology even though it is an FM repeater. It can be linked to other repeaters and gateways using both Allstar and EchoLink connections. It is important that 4 second gaps are left between overs. This allows other users to break in, lets the hang timer reset and also any linked repeaters/gateways to reset.

End of over tones, known as courtesy tones are used on the repeater and they inform users where transmissions originated from. 

At the end of a direct radio transmission, the repeater transmits a morse K - dah dit dah

At the end of network-based Allstar overs, the repeater transmits a morse I which is short for internet - dit dit 

EchoLink overs are identified by the repeater transmitting a morse I followed by an E which is short for Internet Echolink - dit dit      dit 

GB3RF has an 8 second hang timer, this means at the end of an over the repeater will stay in transmit for 8 seconds. You should wait 3 seconds after hearing the tones before you reply. The main reason for the hang timer is to remove the squelch crunch as the repeater ends its transmission.