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Old Aug 27, 2009, 09:38 AM
Registered User
Stone Mountain, GA
Joined May 2007
408 Posts
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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.
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Old Aug 27, 2009, 09:56 PM
Woodsy
Drouin, Australia
Joined Sep 2003
2,117 Posts
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
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Old Aug 28, 2009, 09:20 AM
Registered User
Stone Mountain, GA
Joined May 2007
408 Posts
Well, that didn't seem to work.

Anybody have an email address for Paul?

Thanks
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Old Aug 28, 2009, 09:23 AM
Real Time Recon
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smith mt. lake VA.
Joined Jan 2007
8,258 Posts
Put a set of these on & hear any alarm from a far...RTR
http://www.activeforever.com/t-Heari...ng_Device.aspx
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Old Aug 28, 2009, 02:06 PM
Registered User
Stone Mountain, GA
Joined May 2007
408 Posts
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
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Old Aug 29, 2009, 05:28 PM
PLD
Magicsmoke maker
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Australia, QLD, Charters Towers
Joined Dec 2003
17,397 Posts
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.
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Old Dec 04, 2009, 09:39 PM
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Australia, NSW, Katoomba
Joined May 2002
5,430 Posts
Quote:
Originally Posted by pldaniels View Post
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---
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Old Dec 04, 2009, 09:47 PM
PLD
Magicsmoke maker
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Australia, QLD, Charters Towers
Joined Dec 2003
17,397 Posts
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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