In my remote contest station I have a tower with a 3 el 40 m yagi (DIS 7-3) which is no more than 70 feet from aan other tower with 5 over 5 el 20/15 m stack (JK 2015). Unfortunately I discovered that the 3 el 40 has broad resonances at 16,6 and 22,5 MHZ (< 1.4:1) which couples strongly to 20 and 15 m bands of JK20/15 yagi. Of course putting in band pass filters and stubs could diminish these artifacts a 60 dB + 25 dB = 85 dB but still produce considerable signals into either 40 m or 20 m ham bands of the 6700.
I understand that the preselector add 20 db of isolation per ham band. How broad are these filters per ham band? How are the RX inputs (A and B) protected?
I have read about the ADC overload indicator with the protection relay- has this function been improved anyway?
I understand that the preselector add 20 db of isolation per ham band. How broad are these filters per ham band? How are the RX inputs (A and B) protected?
I have read about the ADC overload indicator with the protection relay- has this function been improved anyway?
Posted 1 year ago
