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579audfilter [2007/03/28 15:30]
n5na created
579audfilter [2007/05/20 20:43] (current)
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 ====== Century 22 Audio Filter Mod ====== ====== Century 22 Audio Filter Mod ======
-**From the Ten Tec Reflector March 4, 1999**+**From the Ten-Tec Reflector March 4, 1999**
  
 Recently I acquired a nice Century 22. This rig uses an audio filter between the detector and audio amplifier for all of it's selectivity. When I advanced the "filter" control for maximum selectivity, I noticed that the peaked or resonant frequency of the filter was very low, around 350hz. This did not correspond to the manual's specification of 750hz and made for uncomfortable listening. Recently I acquired a nice Century 22. This rig uses an audio filter between the detector and audio amplifier for all of it's selectivity. When I advanced the "filter" control for maximum selectivity, I noticed that the peaked or resonant frequency of the filter was very low, around 350hz. This did not correspond to the manual's specification of 750hz and made for uncomfortable listening.