On 2012-01-08, at 11:17 AM, [email protected] wrote: > Charlie, W0CD, found he could spread a coil or remove a turn to "customize" > the rejection for local stations. Although we do not have an actual > filter-response curve, we were able to move F4 up to 1400 KHz to nul a > local broadcast station just over a mile from my QTH, which seemed to also > move the start of the attenuation closer to 1.8 MHz.
Hi George, I'm curious as to how the results might compare, if one were to simply place a series-connected coil & capacitor wave trap (resonant to the BC station's frequency, of course) to ground at the receiver input...? Was that tried prior to the inclusion of the high-pass filter? The wave trap could be made even more effective if one were to place a second parallel-tuned trap in series with the antenna lead, and installed between the receiver & the series-tuned trap... ~73~ de Eddy VE3CUI - VE3XZ _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
