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Those chirps and squawks heard on radios

I would like to find out how to get those sounds you hear when public safety units are on the radio.

There are those chirps and rapid DTMF and those double blips.

Ok, now, I would like to get those similar sounds as a "Roger-Beep" or End-of-transmission sound to use on CB. Yet I would hook up an inline unit between the radio and the Microphone and it would be heard as I keyed up or after I release the PTT.

What IC or ICs would be needed and other components to achieve close relation to those sounds heard on police/fire/rescue radio repeater systems.

Thank you :)

Sean KD4ADV "240-Robert / Mobile"

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sean
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unit

Reply to
sean

or

systems.

Google "roger beep generator". Build it, use it, and be prepared to be considered a wanker.

Cheers.

Ken

Reply to
Ken Taylor

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