internal setting 1260x

[Koala]

Bought one of these broken for the shaft coil and box. However when I have had a look at it there is just a broken battery wire.

When switching it on the sensitivity was very bad and a small chip of ferrite give a massive signal.

I suspect someone has had a play with the internal pots.

Did notice a photo of the 1220 has the same PCB

I have marked the 5 POTS and had a quick try.

Found the ground balance. Doesn't reject fully the ferrite but not far of.

I assume the setup is going to be similar the 1266x except without the static mode.

Turned two of the pots until a threshold sound is heard and backed them off a bit

Leaving two unknowns which don't appear to have much affect. One across the RX

Now air test 12" on a "copper" 2p and 7 1/2" on a silver sixpence.

Tested on a 10" buried Victorian penny and its an easy target even with the disc set quite high. My IDX struggles unless the disc is set to zero.

The front tune button adds a tone to the headphone but this doesn't alter

Any help appreciated

[kt315]

Did notice a photo of the 1220 has the same PCB

interesting. can you share some pics of your board? my email [email protected]
a schematic is being and you can find all pots functionally.

[Koala]

I will take some better pictures when the lights better

[kt315]

low resolution pics are not informative. i had gave my address and gmail is adaptive for files of any length. thanks.

[Koala]

Been having a play with it and quite impressed.


Found a large piece of coke in my finds bag that I accidently dug up last time out and waved in font of the coil. Turned the disc up until it made the iron spit sound and did the same with my IDX.

Then waved various items with the coke in both in the horizontal and vertical plane.

except for a cut Halfpenny it wipes the floor with an average extra 2 inches depth and nicer tone.


a silver sixpence is fine but a cut Halfpenny with that amount of discrimination gives a very broken sound that I would not dig. Sort of a cross between a double beep and iron spit.


On this one test its about 30% better.

[Koala]

Been giving it a test on some pasture with long wet grass and plenty of iron. Getting good depth on the coins. Spade blade is 9" long after cleaning the soil out of the hole some coins were still in the compacted base of the hole. So well over 10" if you include the grass more likely closer to 12" but this is a guess.

Only dug two pieces of iron both of these I thought was iron but dug to see the limits of the machine and one piece of coke which gave a nice solid tone. Discrimination is very good if you use good quality headphone. Very similar to the Whites 6000 in it needs a fast swing to discriminate properly. So I do a normal 2 second sweep then a fast wiggle of the coil over any potential targets.

Detector was so stable even though I had the sensitivity turn up to the edge of stability. Normally I would expect a few random cracks and pops especially as I was digging through bits a broken bricks pots coke and rocks. Nothing just a repeatable spit from large iron or rounded tone from good target.


Only slight problem is it doesn't like small lead. Small iron is discriminated out at 4 and a small pistol shot at 5. However small thin lead is also discriminated out at 4.

Apart from the lead it blows both my IDX and Bandido out of the water for reliable hitting the deeper target in those ground conditions.

Original I was going to gut the innards and just use the mechanics and coil but think its too good to destroy.

[kt315]

thank you!

Fisher 1260x coil specs.pdffischer 1260.pdf

[kt315]

...... fisher1260.pdf

[Koala]

Really is a great detector. Boy if the 1266-x is better.


You do have to be careful with the sensitivity setting. Depth drops of very quickly. 45 degrees of the POT and you loose 1/3rd of your depth.


Small silver coin are an easy signal at 8" inch in the house and still fair target at 9". If the same as the copper coin in the garden I don't expect much loss in the ground. Same coin tested in the house on a T2 at maximum sensitivity constantly chirping away was an iffy 8"


The best bit though is it makes no difference how you sweep. Fast, slow or even ultra slow makes no deference nice sweet rounded tone every single time.


Discrimination seems very good in the field. You do have to speed up the sweep for it to work correctly.Been out twice and only dug a couple of bits of iron. Not bad as I run only enough discrimination to partly reject a forged nail. Long thin iron vertical fools it every time. Luckily not much like that in the field.