detector stem

[bernte_one]

here my last one
made from elbow crutch and water pipes


regards bernd

[Gold Finger]

I have experimented with various materials such as aluminium crutches, telescopic mop handles and hikers sticks.
By far the best suited tube for detector stems in my opinion is carbon fibre, which I use. It is very strong in compression, doesn't flex like plastic, and is extremely lightweight.
An anglers landing net pole is probably the easiest method to gain the correct strength material.

[TH Jim]

Gold Fingerer:

Are you not going to show some photo's of your detector modifications?

Regards Jim

[Gold Finger]

No need to, as it is very straight forward to construct.

[Jerry]

Here is my latest effort at building a TGSL. The board is the EDU version with a few changes to the threshold of U107.

The housing for the control box is from a junk DC to AC converter. Armrest is cut from 4 inch diameter thin wall aluminum irrigation tubing. Shaft for armrest is a piece taken from a spring loaded shower curtain arm. The 45 degree elbows are 3/4 inch PVC fittings. The tubing OD is 3/4 inch and fits so tight that I used PVC cement as a lubricant to enable seating the tubing all the way. Once set, I can not move them. The upper shaft is from a weed eater. The lower shaft is from a wood broom handle turned to fit the tubing and sanded square at the ends to fit the coil. Bolt is from a toilet bowl lid. Cable is from an old USB device.

The material for the armrest padding is from an old bag type cell phone. I glued the foam to the aluminum armrest and the wife sewed the cover which has a pocket on each end so it can be slipped over the ears of the armrest.

Power is two nine volt batteries under the armrest. In retrospect the detector would have balanced better if I had used a 12 volt pack of AA cells and just accepted the added weight. (About 3 1/4 oz difference)

This is the lightest detector I have made so far. It weighs 3 pounds 2.4 oz with the batteries installed.

I am not real happy with the 45 degree PVC elbow to make the S shaft. They appear to be plenty strong enough, but I do not like the feel of them compared to the Garrett At Pro shaft that I have for my other TGSL. I will probably switch them around and use this one for a testing detectors.

This has been long but maybe it will give some one an idea of possible materials to use.

Jerry.

[sdesic]

Can I make a square coil (holder) ?
I have 16x16 cm square that can hold coil ...

[inio_01]

Hello Brnete_one
maybe it's not a perfect design, but I can share my solution. made a few came to the conclusion that it is easier to convert an elbow crutch with separate armrest and handle, just like the pictures, you have to turn the handle 180 degrees and fold back lower part I made from PVC pipe (Nibco) 1/2 "of about 25cm in length




Regards

[Davor]

My "design" is almost the same as Bernte's, with a twist. Literally. I added an adapter for a camera. I also realised that centre of gravity is off in case device is mounted in front, and I found a position where to fix it to get a proper balance. Much better this way. Feels much lighter with centre of gravity put right.

[inio_01]

Hello
Devor thank you for your answer, probably both of these versions have their supporters and opponents, I wrote that among the solutions that I managed to do this seems to me to be the most beneficial (of course, only taking into account rework an elbow crutch). if you have an elbow crutch same lengths my version (tube rotated relative to the handle about 180 degrees) arm will be less tired because it is more straight. I do not use cameras, electronics I put on top of the handle, I put the batteries do not accidentally in the back. the center of gravity is a vertical line in the circle, in my opinion, is in the right place, if you grip the handle search coil slightly outweighs the whole construction forward, the weight is distributed in part on the handle and armrest. but only I uphold to the handle, do not carry it by the handle.

of course, on this and other topics can talk forever, I have presented only versions use an elbow crutch as a detector stem, if anyone has questions about the rebuilding an elbow crutch in this way I will help

Regards

[WM6]

Good work guys, almost Pro solutions.

[bernte_one]

hello friends

took the last years but finally in 2013 i made i perfect for me
thanks for following this thread and giving inspiration




kind regards

[Dixix]

I used a 1-leg tripod (aluminum). All segments I shortened, so that the rods are pretty small push together. The lower stem I replaced by a PVC rod. In plastic rod I have milled with a router table 2 grooves. The head where the coil is mounted is made of PVC and glued with two component adhesive. When everything is done, I make a final photo.
Regards, Dirk

[Magnette]

Here is the mockup of the Surf 1.2 PI that I am currently making. I made ther lower stem from 22m overflow pipe and modified the various glue on unions and junctions. Using a glue on connector, I literally glued it to the lower half of the crutch. I used plumbing washers for the rubber inserts.

[bernte_one]

state of art

ok

it last some years to reach this perfection
but this stem (straight shaft) and one other from germany (s-shaft)

are the current state of art

thanks also to georgi for the armrest (i think at moment the best i can get)

enjoy looking these pictures

kind regards

[Thomas]

Nice, very clean lines, is the grip adjustable?