Siren/PA audio problem

WB4JGI · Post by **WB4JGI** » Fri Apr 28, 2006 2:18 pm

I have a HLN1185B siren/pa unit hooked up to a T83FWA7HA9AK no dek either everything done through the control head. The siren/pa unit was hooked up to a whelen SA314P speaker. I programmed it for PA and EXRD only and when I keyed the mic on PA I could hear my voice through the siren speaker but, it was reallly low and I had the PA volume set to 15. It wouldn't even sound the airhorn tone when I programmed it the second time. So what do you guys think? Bad amp or bad speaker, because the speaker is brand new.

jmr061 · Post by **jmr061** » Fri Apr 28, 2006 2:36 pm

What volume level is the PA volume set to. Have you turned it all the way up? Also have you double checked that the main power lead for the siren is getting power. That is what supplies power to the amplifier itself.

Jason

WB4JGI · Post by **WB4JGI** » Fri Apr 28, 2006 2:39 pm

I had the volume up to 15, sorry about not mentioning that before, I just edited my previous post. And no I didn't check the power lead. I don't have any way to check it now because I left the cable and siren at the radio shop and they won't reopen till monday.

jmr061 · Post by **jmr061** » Fri Apr 28, 2006 2:40 pm

Have you verified the main power lead for the siren is getting power into the 1185 unit and is it properly grounded.

Jason

WB4JGI · Post by **WB4JGI** » Fri Apr 28, 2006 2:42 pm

It was grounded to the seat bolt and the radio displayed that all the siren/pa functions were working normally.

jmr061 · Post by **jmr061** » Fri Apr 28, 2006 2:45 pm

You can disconnect the power and the ground and it still will show on the control head everything is working properly. You need to verify that it is getting power and is grounded good. The power lead supplies power for the AMPLIFIER within the 1185 itself, it doesn't supply power for it to work.

In a properly working system you can pull the fuse, turn the siren on, hear the siren noise being produced within the 1185 and hear it coming out the siren speaker just a little bit. It does this because the the AMPLIFIER isn't powered.

Jason

WB4JGI · Post by **WB4JGI** » Fri Apr 28, 2006 2:50 pm

what fuse is this? I never saw one or mabye I just didn't dig deep enough into the unit. I was able to verify it is set up for a 100 watt speaker. I don't really know if that will matter.