Differences

This shows you the differences between two versions of the page.

--- omni30mmod [2017/04/29 16:35]
n1ooq
+++ omni30mmod [2017/04/29 16:44]
n1ooq
@@ Line 75: / Line 75: @@
 Lowpass board, bottom side, showing pads for 30m mod: {{:img0019a_-_edit.jpg?100}}
-Lowpass board, top side, showing finished 30m filter mod. Right, a 330 pF cap. Center, a 560 pF cap. Left, a 270 pF cap. The 2nd leg of the caps is soldered to the ground plane on the top side of the circuit board, as directed in the Tentec instructions. Near the center, the two inductors : {{:img0034a_-_edit.jpg?100}}
+Lowpass board, top side, showing finished 30m filter mod. Right, a 330 pF cap. Center, a 560 pF cap. Left, a 270 pF cap. The 2nd leg of the caps is soldered to the ground plane on the top side of the circuit board, as directed on Diagram 1 of the Tentec instructions. Near the center, the two inductors : {{:img0034a_-_edit.jpg?100}}
 ===Alignment and Testing===
+A general-coverage receiver with a BFO will be needed for alignment of the 9 MHz bandpass filter. Adjust the capacitor with a non-metallic tool only! A metallic tool will introduce a large amount of noise into the circuit, which will pass directly to the power amplifier. Adjust for minimum signal at 9.000 MHz. The rig may or may not need to be connected to an antenna, and may or or may not need to be transmitting (at low power) to hear the signal.

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