A friend of mine in our local radio club sent me the following email "I'm 6/10's of a mile from an AM 910 KHz. transmitter. They operate with 5k daytime and 2k at night.
They're S9+45db on 160 meters with clear audio and S9+35db on 80 meters. have an inverted "V" resonant at 3.715 MHz. orientated east-west, towards their reflector tower." The station is willing to pay for a filter for my friends station, and he has looked at notch and band pass filters but has concerns. I recommended he look at transmit high pass filters to knock out signals below 1.8 Mhz and provided him with various links: https://www.dunestar.com/store/160-Meter-Highpass-Filter-pid-8.html http://www.kf7p.com/KF7P/Morgan_Filters.html https://www.dxengineering.com/search/part-type/transmit-high-pass-filters/product-line/dlw-associates-am-broadcast-band-brick-wall-high-pass-filters?autoview=SKU&sortby=Default&sortorder=Default I have no practical experience with any of these filters and was wondering what the TB Gang thought. He would prefer one that handled 1.5 KW but I told him he may have to settle for 200W. He prefers an "out of the box" solution. Thanks Mark K3MSB _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector