Crystal Filter Design

Design

• Butterworth, Chebyshev filters
• Narrow bandwidth filters for CW or SSB
• Several crystal filer designs
• Bin crystals using Colpitts Crystal Oscillator
  • Hand select close values from a pile of crystals

W7ZOI Filters

• 9 MHz Filters With Inexpensive Crystals - W7ZOI

CW 5 Crystal

SSB 4 Crystal

SSB 6 Crystal

References

• Crystal ladder filters – Software
• Crystal Ladder Filters for All - ARRL QEX
• DISHAL software by DJ6EV
• A Practical Test Set for Comprehensive Crystal Testing
• Crystal characterization and crystal filter design
• Crystal parameters Written by Hans Summers

Videos

Charlie Morris

• Jan '21

• Mar '20