Open Wire Line – Antenna Tuners

For decades I ran open wire (300ohm twin lead) to a non-resonant dipole. Using a Z-Match antenna tuner running 500watts, I was able to use this system on nearly all ham bands.

Recently I upgraded the amp. I got a very capable amp using two 3-500Z tubes running 1200 watts output on 75 meters. The first thing I noticed was the hall light glowing when I tuned up key down.

Shortly after that I replaced the run of 300 ohm twinlead with RG8X to a broadband dipole centered on 75 meters. That made the hall light stop glowing. It also stopprd knocking my computers off the internet and got rid of the radio interferrence.

I guess I am going to have to retire the old tuner if I want to run power. That is okay. I got 20, 15, and 10 covered with a four element beam. Forty meters is covered with an inverted L. Seventy-five meters has the dipole. Thirty meters has a half-square. The other WARC bands have a multiple band moxon. So I really don’t need the tuner or multiband dipole.