DIY TGSL STEP BY STEP BUILDING AND TESTING

[chuubaba]

I am yet to move towards coil building

[dbanner]

Pay attention to type of epoxy, using a slow curing type and epoxy which doesn't "pull" as it cures.
I used epoxy resin of cheap fast cure and it pulled like ****.

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Balancing the coils is a bit tricky at first, but now it's very easy to do even without oscilloscope believe it or not. I it small plastic bolt to fine tune coil after sealing with epoxy as I found the fine nulling always change after epoxy cured.

[dbanner]

My first TGSL build was successful.
I had problems with my first coil because I didn't use correct gauge wire, my inductances were off by miles.
The other problem I had was with FET's, I used incorrect pinouts the first time but realized the mistake and corrected it
The last problem was I couldn't get chatter, so I did small mod I found on TGS thread that gave chatter, so now had ability to tune to max sensitivity( just before chatter
The final problem I had was shielding, I eventually used very good shielding salvaged from cable used to bring cable signal from road to house. It was perfect diameter for wrapping coil longitudinally instead of spiral.
I used the Version 3 layout
I found that Tl082 work better for me in one of the chips.
Now I'm very happy with its performance

[chuubaba]

Recently have been trying to build TGSL ver.3 as posed in sticky post. Gave it three attempts but all failed. I conclude its time a step by step building and testing procedure is prescribed to facilitate enthusiasts with my level of experience (my level is -10) .
Contribution by seniors gurus will help me a great deal whilst members at large benefit from it too.