Quadrature Detector/Front End Filter; Figure 83. General Location Of The Detector And Front End Filter; Figure 84. Close Up Of The Detector And The Rf Tuned Front End - NORCAL NC2030 Manual

Right now we are using a temporary McDonald's straw PTO coil. When the filter is tuned up, we will
find out that the LO frequency is off by quite a bit. We could tune the straw PTO just like we tune the
final PTO coil, but it will not help us when we put the actual PTO in the circuit because it will be off
also. The point of this initial tuning is to just make sure things are working and to get the tuning in the
right ball park.

Quadrature detector/front end filter

Figure 83. General location of the Detector and Front End Filter

Figure 84. Close up of the detector and the RF tuned front end

Norcal NC2030 v5 12-18-05
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