• To anyone looking to acquire commercial radio programming software:

    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

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    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

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TK7150 Horn Alert

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Feb 11, 2012
Tomball TX
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.



Lots and lots of watts
Premium Subscriber
Dec 5, 2008
Calif Whine Country
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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