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Fredbox: 2m AM tcvr: Oscillator testing |
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Written by Hans Summers
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Sunday, 28 June 2009 03:41 |
 | 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.
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