DIY Pulse Induction Detector (Impulse III)

[Bush]

Coil Works in Progress.
1. 12`` coil foam insert.
2. New coil top & base. Armstrong bucket base & 20 liter oil tub.
3. Base & coil workings
4. Conductive painted shields.
5. 13`` Shield plate Ohms resistance test.
6. 13`` Shield 1.5 AAA battery DC volt test.
7. 8`` shield Ohms test.
8. 1940`s 8`` shield Ohms test.

 

[Bush]

NF 12`` Coil Modified re-build for SDC2300.
Air tested maximum faint signal depth results in mm.
Lead shot fishing sinkers.
0.46 g ... 30 mm
0.9 ... 45
1.5 ... 135
5g ... 190
10 ... 210
46 ... 240
104 ... 270

Results disappointing as no significant depth advantages over the standard OEM 8`` coil.
Conclusion ; Faraday shielding coatings are excessively conductive as predicted ref post Modified SDC2300.
Coil weight 860 grams.
Re-Hash on the cards.