07-30-2013, 09:17 PM
The tracking between sections is really best adjusted after you have the radio up and working. The way I do it is to first align the low and high frequency ends with the low freq osc padder and high freq trimmer so that dial calibration is correct at these points. Then check at frequencies in between and bend the slotted end plates of the osc section so that the calibration agrees with the dial calibration. At a given frequency, you bend the rotor end plates section which is just still meshed with the stator as that setting.
Then align the high freq ant and RF trimmers at the high end of the dial as per the alignment procedure. Once this is done, repeat the plate bending of the ant and RF sections at progressively lower dial freq settings for peak signal until you have the response peaked at all points on the dial.
It is a bit of work, but the increase in sensitivity and performance makes it well worth the effort.
Then align the high freq ant and RF trimmers at the high end of the dial as per the alignment procedure. Once this is done, repeat the plate bending of the ant and RF sections at progressively lower dial freq settings for peak signal until you have the response peaked at all points on the dial.
It is a bit of work, but the increase in sensitivity and performance makes it well worth the effort.