Total posts : 45366
MLR: << i didnt realize there was a tuning coil inside the sstran >>
There are, in fact, four coils in series. Which one(s) to be used is determined by the frequency of operation and each is selected or shorted by a DIP switch array. It is a separate DIP switch array from that used for selecting the PPL’s operating frequency. Tables are provided for the switches.
The coils are a part of a pi network tuning in a low pass configuration (good for harmonic suppression). A fixed capacitor to ground is on the input end of the coils and a variable capacitor, for fine tuning, is on the output (antenna) end.
Bill in SE Texas