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TK7150 Horn Alert

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radiomedic

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Feb 11, 2012
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I have set up a tk7150 for use as an alerting radio for a fire station. Right now it only opens the speaker when the two tone is recieved and then remutes the audio after 3 minutes. I am trying to take this a step further and control some lights via relays using the horn alert output of the unit. My question:
1) how do I set up the radio to do this in the software
2) Can the radio do both horn alert and mute and unmute audio with two tones
3) does the horn alert output provide voltage or more of a dry contact closure?

Any help would be greatly appreciated. I am fairly knowledgable about radios and relays and electronics and know how to do this using a motorola radio, but need some guidance on the kenwood.

Thanks,
 
ramal121

ramal121

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Dec 5, 2008
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Location
Sonoma, CA
1) Horn alert is controlled by a button, program one up to enable/disable this feature (later models use the ignition sense to control horn alert on/off). In optional features page 1, set the on time for the horn alert. You may also consider checking off hook horn alert and horn alert backup. That should do it.

2) Yes

3) By default pin 16 of the DB-25 connector goes to ground on alert. Removing jumper R754 inside changes this to a dry contact closure between pins 16 and 23. This is a relay, 1A max.
 
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