Faraday cage fails to screen RF radiations from detection by Oscilloscope probe

trying to build a scalar wave detector that doesn't detect hertzian waves, and having trouble stripping one from the other..

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[Inquorate]

probably the capacitor one; it's foil tape so has a sticky side and not touching the metal box. And I didn't know the piezos made so much RF noise; for that matter, maybe there's even a scalar component to crystal's sparks. Not getting thru the front, it doesn't register without the probes. Thanks for the tips :)

[jarrettmattson]

You've got to ground the box.

[gmcjetpilot]

Could your scope be picking it up directly.... disconnect the probe and see.

[KESLaser]

Foil adhesive tape a no no!

[brendanmichaelpix]

@sixstringmania no it needs what it needs for the freq you want to block

[brendanmichaelpix]

@jarrettmattson false.the material does not shield the field

[nx7t]

The leads themselves are acting like antenna's and picking up the energy



[DouglasLee777]

The tapes sticky side make gaps in the shielding!

[maxlover55]

The Oscilloscope is not sheilded.. so the scope itself is picking up not the Cage,

[pollenark]

is that a faraday cage or a cavity oscillator?

[AnnBearForFreedom]

Wouldn't it make more sense to insulate the bottom and sides of your "cage", in case the probe inside is making contact with it?

[Shandybrother]

see if it works if you ground the input terminals

[halcyon180]

the oscilloscope internals can pick up that EMI from the piezio. If you really want to test a faraday cage then start with a good control. Build a cage that is completely connected at all seams and properly grounded. Unless you confirm that this is the case you dont have a control. Then place something you dont mind frying into the cage and zap it with real EMP.