Metal Detector Model's that can be improoved or modified........

Welcome to our forum! That's a pretty interesting Mod! Did you design it yourself? I'm sure everybody here would lobe to learn more about it.

Best wishes,

Christian

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Hi to every owner of a Garrett Ace 250,
I have made an important discovery, which will significantly improve the depth you can find metal and we've all been doing it without realising it.
Whatever you have found normally can always be pinpointed. Therefore when you use the 'Pinpoint Button' it always penetrates deeper than in 'Normal Mode'.

Ideally fitting an over-ride switch to the pinpoint button is the answer, but I can see no practical way of doing so, as its all sealed in under plastic.

If you can find a way to hold the 'Pinpoint Button' down, then you can run your detector in 'All Metal' (Pinpoint Mode) all the time. Reverting back to normal use by releasing the button.

The only other thing you need to do is to fit a volume control to your headphones, because the 'pinpointing noise' would be deafening all the time.
Some may say, "but I have already got an 'All Metal Mode' on my detector".
Yes, that is true, but that mode is only telling you that you are searching for 'all metals' and not discriminating (notching) any out.
I made this discovery when I was comparing the Ace 250 to the new detector I have built.
My experiment was to find out if my newly built detector would find metal deeper than the Ace 250. I tried a patch of lawn in my garden approx. 3M x 4M and in this I found 29 objects with the Ace 250 I then tried out my new detector and found 5 more objects.
(I couldn't dig them as I am banned from digging holes in the lawn).
I went back to my Ace 250 again and couldn't find them; I then tried the pinpoint button and easily found the items.
I think this test proves the greater depth available beyond doubt.
The 'pinpointing button' when pressed draws the same current as the normal mode.

ps:- I tried this test with my larger ?Pro 12" Coil ? and this found less objects than with the standard coil. I didn't think at the time to try the 'pinpoint mode' with this coil.

So to anyone who has an Ace 250 detector it could be worth a try.

Good hunting Mike.


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I will give you some ideas to improve the depth of your detector:
1- To increase the tx power:  (if there is enough place in detector box -  with extra batteries) increase the voltage of the oscillator output transistor within safety limits; or if possible make a ferrite transformer before tx coil to increase voltage on it; or apply the oscillator output to a fraction (let's say at the middle point) of the tx coil to form a autotransformer in there to increase tx output.
2- To increase the rx amplification increase the the feedback resistor at the first preamplifier in the limits of stability.

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Making that hip mount for the 1270, but the stock 8" coil has a 3' cable and need a 7' cable. Asked Fisher if they have one or can make one they say it won't work and they don't have any and I asked them if the cable can be lengthened with a splice and they said that wouldn't work to get a new coil w/7' cable. I can't believe it won't work,  they something about the resistance in the wire, I said the 3' and the 7' use the same wire right he said yes, so I said there isn't any problem when I switch between my 8" w/3' cable and my 10.5" with a 7' cable so why cant I make the cable longer, he just said it won't work. So thats what i'm looking for. Know of anything  for the problem? Have 3 extension cables for my Fisher 555-D that I got from them with a Hip mont kit but the ends are diff. Any mods on a fisher 1270?


Making that hip mount for the 1270, but the stock 8" coil has a 3' cable and need a 7' cable. Asked Fisher if they have one or can make one they say it won't work and they don't have any and I asked them if the cable can be lengthened with a splice and they said that wouldn't work to get a new coil w/7' cable. I can't believe it won't work,  they something about the resistance in the wire, I said the 3' and the 7' use the same wire right he said yes, so I said there isn't any problem when I switch between my 8" w/3' cable and my 10.5" with a 7' cable so why cant I make the cable longer, he just said it won't work. So thats what i'm looking for. Know of anything  for the problem? Have 3 extension cables for my Fisher 555-D that I got from them with a Hip mont kit but the ends are diff. Any mods on a fisher 1270?



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