First thing that comes to mind is bad electrical connection from the batteries to the siren or bad batteries (DC model); or bad electrical connection to the siren from the power lines or transformer issues (if its an AC/DC or AC model).weasel2htm wrote:Several years ago when Sedalia, MO got their system of 2001s there were complaints of the sirens not being loud enough, according to some friends who literally have one at the end of their driveway (it replaced an STH-10) some workers came out an worked on it and tested it several times throughout the day and every test was noticeably louder.
Short of increasing the chopper voltage, what could they have been doing?
From what I understand, they were doing whatever it was to all the city sirens, all of which were brand new. I do know that the sirens have battery backup (one of the reasons for the new siren system)uncommonsense wrote: First thing that comes to mind is bad electrical connection from the batteries to the siren or bad batteries (DC model); or bad electrical connection to the siren from the power lines or transformer issues (if its an AC/DC or AC model).
While that might be true, what is also true is that we're enthusiasts which doesn't automatically mean we have access to such information. It has to come out publicly, and if Federal are keeping their cards close to their chest, so be it.SIRENMAN wrote:Come on guys this site is the premere site for knowledge of sirens. I am trying to find out two things.
It has been speculated that the increase in sound pressure output is an increased rotor speed which leads to an increased suction force in the rotor, therefore more sound pressure to project. This has the side effect of increasing the pitch, which at a distance (depending on conditions) almost cancels out the increase in sound pressure output. It seems that this might be more a marketing gimmick than anything.SIRENMAN wrote:What is the difference between the 2001SRNB and the 2001-130 to boost the db up so much
Google is your best friend. Why not use that? As I said before: if Federal have not released the test results, it is highly unlikely that any of us would have them, since (I'm presuming) that it would be protected information for use by those only involved in the bidding process for contracts.SIRENMAN wrote:Has the 2001-130 ever been tested and if so was it by ANSI S12.14 and where is the report.
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