Crystal Filter Modifications

Yellow arrows show the capacitors that have been removed. The ones on the left (3.547 MHz Filter) had been changed to 39pf to widen the bandwidth. Not a bad idea when just using one crystal also. The "Q" is so high with these crystals that a wide bandwidth is hard to obtain.

The white arrows point to the jumpers that are installed between the remaining crystal and the last capacitor before the output transformer.

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Last Update: 7/12/2002
Web Author: David White, WN5Y