![Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ... Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ...](http://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/9MHz_Ladder_Crystal_Filter.gif)
Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ...
![Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ... Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ...](http://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/Variable_600Hz-1kHz_X-tal_Filter_DL2TM.gif)
Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ...
![Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ... Menu Helical Resonator Dimensions Crystal Filters Types 10 MHz SSB Ladder X-tal Filter 3.58 MHz CW Ladder Filter - N2DCH Variable Bandwidth X-tal Filter - G3UUR Variable Quartz Filter 4.43 MHz SSB Filter 27 MHz - 40 MHz Lumped Component ...](http://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/Roofing_Crystal_Filter.gif)