Telephone: 08 9370 5533 -
International: +61 8 9370 5533

Jenal Communications is no longer operating as a company and no products are for sale.

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Click here to go to our home page Send us an e-mail spacer CM2 Replacement mic for Codan 9323 DM1 DTMF Keypad microphone SC2 Selcall/Telcall Microphone spacer CM1 Replacement mic for Codan 9323 CWID1 Repeater/Beacon controller DT8 DTMF controlled relay unit FA1 Fleetsync controlled interface unit SC12 Aircraft unit SC51 Internal vehicle tracking/selcall unit SC90 Selcall unit for Kenwood TK-90 radios spacer Download manuals here Spares Download schematics here Find radio modifications here

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Definition: Selcall
Definition: Telcall

SC33 - Selcall/Telcall/GPS Display Radio Remote Control Head

Discontinued product - for information only

The SC33 is a versatile unit which can be used to enhance the operation of many different types of radio. The unit adds capabilities such as Selcall and GPS location (for tracking - requires a separate GPS receiver) and can also control scanning or channel selection for some radios (depending on the channel control interface). The built in 1 Watt audio amplifier (with mute) and adjustable microphone pre-amplifier make audio interfacing easy while the 2 line by 16 character backlit LCD gives visual feedback and information.

Selcall, Selcal, Telcall, Telcal, Decoder, Display Click here for the SC33 Manual

Brief Specifications:

Transmit Selcall types: Transmit Selcall types: Selcall, Telcall, Beacon, Hang up, GPS request, GPS location, GPS emergency call, Emergency Selcall
Receive Selcall types: Selcall, Telcall, Beacon, GPS request, GPS location, GPS emergency call, Emergency Selcall
Channel control: Binary (64 channels), 2 x BCD (40 channels), Strobed (100 channels) Normal and inverted control logic programmable
Audio output power: 1 watt into 8 ohms with mute circuit
Microphone input: 8 pin circular connector - pins can be re-assigned
Information display: LCD 2 line x 16 character, backlit
Interface connectors: 15 way D connector for radio interface (audio, power and control)
9 way D connector for GPS interface (RS232 or TTL levels)
8 pin microphone connector, 3.5mm mono jack for loudspeaker
Dimensions: 180mm wide x 85mm high x 65mm deep - not including cradle
195mm wide x 105mm high x 65mm deep - including cradle
Jenal Communications design and manufacture a wide range of radio related devices including units which use the standard HF selcall and telcall signalling as used by Barrett, Codan, Icom and Q-Mac. Thousands of these products are being used all around the world by Governments, NGOs, Commercial organisations and Amateur Radio operators. We also manufacture a number of devices which use the common DTMF (or touchtone) signalling system.
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Last modified: 13 January 2025.