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        Discussion Question about your Lost Model Alarm

#1 dgfinch Aug 27, 2009 09:38 AM

Question about your Lost Model Alarm
 
Having tromped through the woods for about 4 hours in an unsuccessful attempt to find my plane, I have decided that I need a Lost Model Alarm.

I hope you can give me some advice.

The models I have found include:

http://www.skykingrcproducts.com/acc...del_alarm.html

http://www.allthingsrc.com/webshop/p...products_id/39

http://www.californiasailplanes.com/...l%20alarm.html

http://www.towerhobbies.com/products.../hcap0335.html

and

this one on eBay http://tinyurl.com/nt3q7j


I am looking for a LOUD model (preferably over 100db).

There is quite a range of prices and many of the Lost Model Alarms don't indicate db.

Can you share with me what I should be looking for? Please feel free to plug the model you are selling!

Thanks in advance for your advice and counsel.

#2 woodsy Aug 27, 2009 09:56 PM

my 2c worth.

LOUD is good, the louder the better, also low power consumption, you don't want 200db for 5 seconds, may be even something thats intermitent beep would be better.

I'm sure Paul will jump in with some real advice :)

#3 dgfinch Aug 28, 2009 09:20 AM

Well, that didn't seem to work.

Anybody have an email address for Paul?

Thanks

#4 realtimerecon Aug 28, 2009 09:23 AM

Put a set of these on & hear any alarm from a far...RTR
http://www.activeforever.com/t-Heari...ng_Device.aspx

#5 dgfinch Aug 28, 2009 02:06 PM

I hope that I don't have to resort to this. If I have to spend that much money, I think I would prefer to go with http://www.brickhousesecurity.com/child-locator.html.

I haven't heard from Paul. Maybe he has gotten out of the LMA business?

Thanks for taking an interest in my project.

Damian

#6 PLD Aug 29, 2009 05:28 PM

Hi,

I actually didn't see this thread, sorry.

First up, getting to 100dB means you're going to require a physically very large unit and will need an external battery pack to drive it (3S lipo would be typical). It can be done, just that it's quite large.

The units I have are 85~92dB units.

Paul.

#7 oldpilot Dec 04, 2009 09:39 PM

Quote:

Originally Posted by pldaniels (Post 12991293)
Hi,

I actually didn't see this thread, sorry.

First up, getting to 100dB means you're going to require a physically very large unit and will need an external battery pack to drive it (3S lipo would be typical). It can be done, just that it's quite large.

The units I have are 85~92dB units.

Paul.

I am hard of hearing----and Pauls unit pierces my ear---:eek:

#8 PLD Dec 04, 2009 09:47 PM

Oldpilot,

You're not wearing those LMAs in your ears are you... (pierced ears ;) ) Okay, bad joke, just that I see so many people wearing strange earings at this time of the year.

On a more serious/legitimate note, I'm finding that there's a bit of a variance between some of the buzzers, from the same batch (I buy them in bricks of 500 now), if the frequency moves +/-5% from the peak resonance it can seem quieter, though the dB rating still seems quite close. There's the other problem of how our own ears perceive the loudness across a frequency spread. A third factor, and one which makes a BIG difference is the chamber in which the buzzer/LMA is installed. I've found just cupping my hand around the buzzer can significantly raise the perceived output level to pain levels :wince: .

btw Oldpilot, didn't realise you were hard of hearing... nice to see I'm not the only one.


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