Home / Radio / Fredbox: 2m AM Transceiver / Oscillator Testing
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L4 at maximum inductance. Not much going on.
Decreasing the inductance of L4, signals suddenly snap in at about 66 and 86MHz (86MHz might be a spurious response)
Decreasing some more, the freq of the 66MHz peak slowly moves to what looks like 72MHz and "locks" there. Again, the 85MHz peak is suspected of being a spurious response.
Decreasing the inductance still further: signal locks at about 58 and 78MHz. Further decrease in inductance reduces the amplitude of these until they dissappear.