For the 2010 Field Day, KARC decided to add 10 and 15 meter antennas to the half-wave verticals we had for 20 and 40 meters. The FD site layout was designed to have antennas for CW and Phone operation on the same band. The antennas were separated so simutaneous operation on the same band was possible, with no interferece bewtween CW and Phone stations. FD 2010 plans call for two sets of antennas for 10, 15, 20 and 40 - a total of 8 antennas. Members had enough high impedance tuners to support four antennas, but we needed a total of eight. Thus was born the 2010 FD Tuner project.

Martin, KH6MB, agreed to handle procurement and asembly of the tuners. A BOM was generated, procurement started and completed by mid-April and assmembly is in process. Below is a collection of information about the onging project. We'll report on status and results right thru Field Day. (To display a section of interest, click on the + sign to display the information.)

The rotor shaft of the capacitor should attach to the 50 Ohm side. This keeps the high voltage away from your hand while tuning. Keep about 2 inches spacing between the inductor and the capacitor. The red wire and the brown wire from the inductor to the ground connection on the coax connector are #12 or #10 gage wire. This is where all the current is. The blue wire is #16 gaga. One goes to the antenna the other to the ground mat. These are low current lines. Note the orientation of the inductor; wider spacing wire turns towards back of unit.