I am waiting to receive a "defective" PCB of an NFG-230 anutomatic antenna tuner a friend of mine bought as second hand. Unfortunatelly the tuner did not work and my friend was unable to repair it. He kept the case and gave me the PCB as a gift. I would like to try to repair it but unfortunatelly I have neither documentation nor schematic diagramms. I wonder if someone could help me getting at least the schematics and if possible a troubleshooting chart. I would like to use the tuner in a new antenna setup at the base of a marine whip around 30 feet height (it is going to be settled in a really windy area, with speeds above 75mph). Any feedback or advice will be welcome. Thanks in advance for your kind cooperation and help. Best 72