05-09-2011, 08:52 AM
If you can do it, put a piece of brass (large screw?)in some foam and put it inside the oscillator coil form. This will reduce the inductance possibly enough to allow misalignment and reception of 1540. The screw/foam can always be removed without damaging the original coil. Just be careful not to damage the coil leads in the center of the form.
In any stage where your trimmers are fully CCW, put some brass in the associated coil form to raise the resonant freq. Brass impedes the magnetic flux effectively lowering the inductance.
In any stage where your trimmers are fully CCW, put some brass in the associated coil form to raise the resonant freq. Brass impedes the magnetic flux effectively lowering the inductance.
Pete AI2V
