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omni30mmod [2017/04/29 12:13]
n1ooq
omni30mmod [2017/04/29 12:18] (current)
n1ooq
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 ==Adding the lowpass filter to the board== ==Adding the lowpass filter to the board==
-The lowpass filter is built directly on the lowpass filter board. The two inductors are wound from #18 magnet wire - 16 turns, close-wound over a 5/16-inch drill bit. The target inductance is 0.9 uH for both inductors. 1000V capacitors are used in the filter, as it will be handling the full output power of the rig.+The lowpass filter is built directly on the lowpass filter board. The two inductors are wound from #18 magnet wire - 16 turns, close-wound over a 5/16-inch drill bit. The target inductance is 0.9 uH for both inductors. 1000V capacitors are used in the filter, as it will be handling the full output power of the rig. There is a jumper wire which needs to be removed - see the Tentec instruction sheet.
  
 Lowpass board, bottom side, showing pads for 30m mod: {{:​img0019a_-_edit.jpg?​100}} Lowpass board, bottom side, showing pads for 30m mod: {{:​img0019a_-_edit.jpg?​100}}

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