uBITX AM BCI Filter (3.5mhz High Pass Filter)
Based on:http://vk3il.net/projects/broadcast-band-filter/
Use T30-6 :
1.622uH = 21 turns (0.4mm wire, 31cm length)
1.461uH = 20 turns (0.4mm wire, 29cm length)
Use 1206 SMD NPO capacitors.
2x 560pF
2x 1500pF/1.5nF
The board:
9mm x 33mm
Installation:
Cut the second trace down and tap the filter in there.
Pick up the 2 grounds from unused C216 and C210
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