100% Permalloy Core Autoformer soft iron shielding case (easy to install top side of chassis and looks good. Using three mounting bolts, 28 steps! Suitable for use in TVC (AVC). 28 step gives about 60 DB of attenuation.

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Attached find the test data as installed in Do-It Box.
Our EMU1616 is not quite flat at the top. Based on loop back measurement of EMU
Correction to be applied to measurements of FR using EMU:
20KHz +0.25dB
30KHz +0.50dB
40KHz +1.00dB
50KHz +1.75dB
60KHz +2.50dB
70KHz +3.50db
80KHz +4.50db
This means measuring -6db @ 80KHz actually is -1.5db from the DUT and 4.5db from the test setup.