Cleveland RAYNET Group

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Relays

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Not all stations in a network may be in direct contact with each other.  If not, we will relay a message through an existing station.  If the planning of the event indicates that most of the stations probably won't be able to speak to each other, we'll provide a separate relay station at a good radio location.

A manual relay consists of the message being sent from A to B to C.  If relay B has talk-through facility, the message is sent on one frequency from A to B.  Relay B automatically retransmits the message on another frequency.  Station C listens on that other frequency.

An Amateur Radio repeater is at a designated fixed location and much paperwork and planning is required before a licence is issued.  The process could take weeks or months.  Any licensed Radio Amateur is allowed to use an existing repeater.

RAYNET talk-through is a very similar thing, except it is done on an ad hoc basis.  Talk-through is used where it is needed at a particular event.  It is provided by and for the sole use of the RAYNET operators at that event.

Talk-though Unit

A single talk-through facility is often enough to link the Control station with all outstations.

Talk-through in tandem

To cover longer distances or larger areas, talk-through units can be made to work one after another.

In the above diagram, Control could be in Stockton-on-Tees, the first TTU could be on a hill overlooking Stockton and the second TTU could be on a hill overlooking Durham City.

Alternatively, Control could be in an underground room in Middlesbrough, the first TTU could be in a nearby car park and the second TTU could be on a hill overlooking Middlesbrough.

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Page updated on 09 January 2017

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