Month: June 2017

Introduction to Surecom SR-112 Simplex Repeater Controller

The Simplex Repeater Controller Principle

The Surecom SR-112 Simplex Repeater Controller is a device that allows you to setup a “field” or “emergency” simplex repeater. In other words it is -and as we call it locally- a Parrot. It records and replays what it hears from the radio it is connected to.

So what the user has to do, is define the simplex repeater frequency, set it on the radio and connect the radio to a Simplex Repeater Controller by a purpose made/bought cable. The device will start repeating what the user will speak on the radio.

simplex_repeater_controller small

It is a dead simple, easy and economical way to set up a repeater and cover dead ground, but it does have its shortcoming. While simple technically, it is a bit complicated operationally. It requires all involved parties to expect a repetition of what they are hearing.

Let’s assume that a Simplex repeater is placed on the top of a ridge to cover its two sides. The caller will input the message on the repeater and another user on the other side will hear the repetition. but what if there is a third user on this side of the ridge, within range of the caller? It will hear the message twice! And if not advised Not to, he will probably try to respond on the call, disturbing the repetition….

Continue reading “Introduction to Surecom SR-112 Simplex Repeater Controller”

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Do NOT miss out on Bret’s SurvivalComms Youtube Channel

By a strike of luck the SurvivalComms name is used by me for this blog, and by another guy (Bret) for his YouTube channel.

It also happens that we both are focused on practical HAM radio matters for Survival and Prepping.

Bret is not only knowledgeable but also good at breaking down matters and applications  into simple, layman’s terms. Among these are his DIY simple antennas.

So DO subscribe to his channel.