Repeaters must have a control link which allows the repeater to be disabled by re-mote control if necessary. Note that such a controller cannot detect and correct im-proper use of the repeater. Although no control operator is required to be present at a control point while the repeater is op-erating under automatic control, it is still
The controller manages the PTT of the main repeater and associated radio links. Each transmitter can be enabled or disabled, and control of TX functions can also include CTCSS control. Timeouts are fully flexible on main timeout (mins), callsign (mins), length of tail, presence of courtesy tones etc. etc. Three callsign modes are supported.
Electronic Control System. High quality JFET opamp - Top audio quality, High output. High quality JFET transistors used in the audio circuit. Low rolloff <50hz. Beacon mode. Discriminator or straight through audio. Five high quality pots (Bourns) for level adjustments. Five LED's for system status indication. Built in Watchdog timer.
Elektra 2500CT - Controller. Repeater controller board with buil in CTCSS decoder and Voice ID . $185 Add to cart View. Available. SSM400 - MÓDULO SUPER SQUELCH.
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Controller in use Controller Bill of Material Link to Controller Board w/RELAYS . PROJECT BLOG PAGE . MORE PICTURES AT THE BOTTOM OF THIS PAGE . I know, I know.... not another repeater controller! After all there are at least a half a dozen very good 16F84 PIC based Amateur Radio repeater controllers on the net.
The repeater would have an audio filter that would extract the tone, and only if it was present would the repeater activate. The standard frequency generally adopted for this is 1750 Hz in Europe. A margin of around 25 Hz either way will normally access a repeater although it is wise to maintain the tone burst frequency more accurately than this.