Station alerting question

[jban]

Ok, let's see if I can explain this right.

I have a Minitor 5 piped into the station PA system. Works fine. Problem is auto reset. I want it to reset after 30 seconds WITHOUT open squelch.

This setup is run thru an amp charger. Anyway, I thought I could use the relay circuit from the amp charger to do this.

1. Could I use the dry contacts from the charger to trigger a relay to open the audio output to the PA system?

2. Could I interface a timer to the charger front panel reset button to shut off the audio?

If this would work, I could program the pager normal and not have the open squelch issue. We have the station radio (CDM1550) piped into the PA for monitoring and I had it set to decode but could not make it reset on its own.

I am trying to use existing equipment (have a lot of spare pagers)

Any ideas appreciated.

[nmfire10]

I believe the amp charger's dry contacts when used an auto-reset configuration will time-out after 10 seconds. There is no way to adjust the time on that. It is either latched until manual reset, or it is 10-second timer.

What I did was use an Altronix 6062 timer board. (http://www.altronix.com/index.php?pid=2&model_num=6062) It has a double throw relay and trigger input with a user adjustable timer. It runs on 12 volt. Super easy.

The charger's timed contact closure trips the 6062 timer. This closes the relay contact and I have it set for about 45 seconds. I also tied the contact closure from the charger into an alert tone generator on the PA system. It was working flawlessly until the amp charger died.

[jban]

Thanks, I will give that a try.