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579audfilter [2007/03/28 19:30] n5na created |
579audfilter [2007/03/29 09:31] n5na |
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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. |