Did you consider Corriflute?
https://mindsetsonline.co.uk/shop/corriflute-3/
It’s very light yet rigid, especially if two layers are used with the corrugations at 90 degrees to each other.
Another neat job sir.
In my former life, changes to existing kit that needed to be modified pronto whilst “out in the field”, often with paperwork to follow, a field modification.
Did you modify this in a field, or is it just for use in a field, and will it affect the field current of the search coil?
I’ll get my coat.
That sounds just the job JB. Once I have proved that the machine does what it should do, I can go back over and modify the coil and some of the electronics, and even try different methods of winding the coils. Even perhaps adding an amplifier to make it more sensitive.
Thanks Fruitcake, much appreciated…
Your sense of humour really appeals to my sense of humour Fruitcake…
Would you describe me as being outstanding in my field…
(with a metal detector)
Good luck, OGF, but I’m sure it will work perfectly.
(Oh, can I have 10% of the treasure please?)
So, what’s happened? Is the metal detector up and running as yet? How about a progress pic
Thanks for your inquiry Minx…I’m chuffed to see you in here…
At the moment I’m concentrating on the enclosure for the electronics. I’ve worked out where to situate things like the ‘Potentiometer’ (the knob that adjusts the sensitivity) the connections for the leads from the search coil, and the power input socket. There is also an on/off switch and an output jack to allow headphones to be attached. As you will appreciate it takes time to decide the most convenient place to place the various controls.
Unlike the search coil construction, it doesn’t actually show any progress as each stage is completed, because in order not to damage a completed stage it has to be removed before construction of the next. Only when all stages have been completed can it all be assembled. However, because of you kind enquiry, I will take some pictures tomorrow so you can see what I mean…Thanks again Minx…
So there has been substantial progress. I saw a pic of the Potentiometer a few pages back on this thread so no need for more pics on my account -thanks.
Your workmanship is very neat and professional.
Have you decided on an Oscilloscope as yet.
One of the members on the forum donated an oscilloscope to the Foxy workshop Minx, to which I am very grateful.
Having not had much experience with an oscilloscope I hope to give it some attention once I have finished the Metal Detector and one or two other projects in the pipeline. I must point out that my workshop is in the loft, and although I have got it insulated, it gets very cold when the temperature drops, so it it’s not all that comfortable at times to perform delicate work. Bring on the spring!..
Thanks for your kind complement Minx…:hug:
Found the generous soul - of course it had to be Visitor!
Great bloke Minx, and made me very welcome when I visited…Had times been different we would have had a lot to discuss…
Do you remember Steptoe and Son? There was an episode where one of them threw the house keys into the scrapyard in a fit of pique.
After a while they both realised they needed to find the keys again, so Albert had the bright idea of digging out a piece of kit to help with this.
You then see him with an old WW2 Mine Detector set, saying it would soon find the metal keys.
Harold then pointed out that the whole scrapyard was full of metal.
Ah, the classics.
We used a lot of O-Scopes at work. When I first started there were banks of twin-beam scopes to look at signals being recorded on 14 and 28 track magnetic tape tape. Later we went to more but smaller single beam scopes, and used anything up to two 42 track tapes in an artic-trailer.
Then it all went digital so scopes and frequency analysers appeared on banks of pooter monitors instead.
Do you have a signal generator to set your scope up?
We used Levell Decade Oscillators but later went to fancy multi-function signal generators that could produce just about any waveform you liked, and even sweep a frequency output from 0 to 20 kHz.
I’m assuming you’ve got a decent multimeter or two. I’ve still got my Fluke 73.
Do you need something that reads frequency as well?
… and there’s me, a mechanical enginerd talking electronoids, or borax as it is otherwise known.
Truth be told, I wouldn’t have a clue how to do what you are doing, or anything at all about electronics. Anything beyond Ohms law is a Black Art as far as I am concerned.
I’d take my hat off to you but my bonce would get cold then.
Same here Fruitcake, I wouldn’t have a Scooby Doo. My Old Man was an electrical wizard but, it was hard to tune in to his wavelength.
How clever you are Foxy
Thanks Muddy, but I couldn’t draw and paint like you…
I might risk a visit to the workshop today Fruitcake…Brrrrrrr, and post some photos of my equipment…:shock:
We do tend to go off on one occasionally Spitty…Electronics certainly excites me…
[CENTER]Breaking News![/CENTER]
I’m expecting a delivery of some bits for the Detector today…
That depends on where you apply the, ahem, device surely. 
Progress !