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SPEAKER SETUP FOR DETECTING; Making your own
Topic Started: Wednesday 16-04-2008, 17:22 (257 Views)
Topcat
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Hi Everyone,

For those with a little technical knowledge & wish to make their own external speaker setup for the Minelab SD series & have a signal enhancer on their setup.
All you need is:
1. Soldering Iron & some resin cored solder.
2. A 5cm (2inch) 4 ohm 5 watt speaker like the one that is fitted in a personal computer for the 'beep' alarms.
3. A suitable phone-jack (same as for your headphones)
4. A short length (I only used 800mm) of single core shielded cable similar to your headphone cable.
5. A small plastic zippy box of suitable size from Dick Smith to fit the speaker.
6. Belt clip. (I used one off a measuring tape that I didn't need anymore)

Most of the items I had laying around the garage & what I didn't have was available from Dick Smith for $5.00. & it works a treat. I drilled a series of small holes in the lid of the speaker box in a circular fashion to allow for the sound to be heard. Should work on the later minelab machines as well.

Cheers,

Ted


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Gypsy
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Great setup Ted,
will have to give it a go and see if i can make one.
cheers for the info!
Don't wish it was easier, wish you were better.
Don't wish for less problems,wish for more skills.
Don't wish for less challenges,wish for more wisdom.


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Deleted User
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Thanks Ted

is a speaker for a PC OK, the external type that attaches to your PC? Or will that draw too much current, I am using a GPX4000

regards
Norm
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Topcat
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Hi Norm,
The speaker I used was out of a PC (the little one that is fitted for the Beep Alarms). If it is the same impedance & wattage (4 ohm 5 watt) then it should work. I think anything bigger then that would possible need a separate amplifier to run it. The signal enhancer (Coil-Tech) I have when turned full on is loud enough to hear comfortably. The only way is to try it & see.

Cheers,

Ted


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www.havewheelswilltravel.iinet.net.au
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whose life has given them vodka, & have a party"!!!!

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Thanks Ted

Are the "signal enhancers" simply inline audio amplifiers, or is there more to it than that?
Can you make your own for the GPX4000?

regards
Norm
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Nightjar
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Hello Normyjohn,
I believe Ted is out on the track.
You can run an external speaker straight from your machine using the threshold.
The only problem with this is, if there is any wind it is difficult to pick out the faint signals.
Give it a try you can't do any damage.

Cheers
Peter
Good luck & safe travels
Peter


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Thanks Peter,

Have you ever experimented with an Audio Amplifier Kit etc, basically that is all a Signal Enhancer is it would appear? Is there any "special" circuitry needed in one to give a steady, quiet signal? If they are only a simple audio amp then the prices charged seem a little over the top?
Dick Smith has some kits, I think I might give one a try.

regards
Norm
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Nightjar
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Morning Normyjohn,
Have put together many of the Dick Smith circuitary models in the years gone by however never an amplifier. One problem is the power supply, most models require 12V
Jaycar also have a range www.jaycar.com.au
Nothing ventured nothing gained.
Lets us know how you go.

Cheers
Peter
Good luck & safe travels
Peter


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