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Elk 150RT Siren Whining Problem
Posted 24 August 2009 - 12:31 PM
Global 26 is set to voltage.
The siren functions OK on alarm.
The trouble alert functions OK if the siren is disconnected.
The non alarm voltage is around two volts at output 2.
The siren has a low volume, high pitch whine present at non alarm times.
Any ideas how to fix this? What is the problem?
Posted 26 August 2009 - 12:56 PM
Posted 26 August 2009 - 05:41 PM
Brad suggested one, then two resistors to bleed down the supervising voltage. Didn't help much.
My siren placement is close to a walk path, so what is a problem for me, may not be an issue for a gable.
I am considering gutting the siren of the driver board and driving the speaker direct from the main control.
Seems like a win-win, but I don't know why an Elk siren doesn't peacefully exist with an Elk control.
Posted 28 August 2009 - 12:05 PM
Posted 28 August 2009 - 12:25 PM
I have this same problem with the high pitch noise. Did you ever solve the problem?
Well, yes, sort of.
When I received no further response from Brad over on the Elk site, (after asking whether or not I would be better to gut the siren), I figured that no answer, may have been my answer.
The siren driver sits neatly inside, cut that puppy right out, wired direct to the speaker, changed global 26 back to use the siren driver in the ELK unit itself. I now have siren and voice output. All seems fine.
Posted 29 August 2009 - 02:04 AM
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