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Bandpassfilter for 80 meter band (3.5 MHz) with Amidon T50-2 cores.

Updated: Nov 30, 2020

5,5 µH coil versus 55 µH coil.


Picture:

Schematic:

34 turns = 5.5 µH capacitor is approx. 320 pF.

104 turns = 55 µH capacitor is approx. 30 pF.

Results:

34 turns: 104 turns:

IL 34 turns:


IL 104 turns:


RL 34 turns:


RL 104 turns:


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