I've got QRM around the house. I haven't identified where it is coming from but between Amtraks overhead power lines 100' away and a confluence of HV overheads & perhaps a plasma set or two nearby, I have to move my Rx antenna. I've killed the power to the house & ran the K3 from battery power and the problem still exists. I tried putting a 17M inv on the roof and the QRM was S6 which explains why the Hi-Z 50' away was much louder on 160 than the Tx antenna 350' away. (Looks like I have to keep using the 80M vert for 17M).
The only place I can relocate the Hi-Z is fairly close to my 160/80/40/30/20M wire antennae where they all connect to the center of the radial hub. I'm guessing one element of the Hi-Z triangle will be somewhere around 60-80' of the hub. The Tx antennae get selected by an Ameritron remote coax switch. I have an ICE 196 limiter in the Rx line which does a fine job of keeping excess Rf signal getting back to the K3 on transmit, the K3 has no overload issues with it in line and when I had another ham's antenna 60' from the Rx ant, there was significant overload to the K3 Rx till I installed the limiter. Only one of the Hi-Z elements will be this close (60' - 80')to the Tx antennae and since the ICE 196 is working well, is there anything else I need to like detune the Tx antennae & if so, how do I best do that with 5 wire antennae? I have one coax running 350' to a choke just before the remote coax switch and the 5 coaxes run 8' to the radial plate & their respective antennae. Thanks, Gary KA1J _______________________________________________ Topband reflector - [email protected]
