15-02-2020, 05:36 PM
Thanks for your replies.
I have been looking at the various articles on the G5RV again and I now know I misunderstood the requirements for the balanced line feeder. I now understand that this forms a critical part of the tuning of the antenna, the length of the line is also critical. So I have ordered a 7m length of 450 ohm feed line and plan to take this from the dipole centre, down to a 6 foot high fence and from there join it to a length of RG8X coax. The feed line needs to be about 16 foot and the coax to the shack will be about 12m. I will experiment with using a 1:1 current balun at the join to coax at the fence.
Doing things this way I hope will improve the antenna as at the moment the balanced line feeding into the MFJ ATU is running in a long curve under one of the arms of the dipole. Taking the feed line to the fence will take it away a right angled to the dipole.
Does this sound sensible?
Mike
I have been looking at the various articles on the G5RV again and I now know I misunderstood the requirements for the balanced line feeder. I now understand that this forms a critical part of the tuning of the antenna, the length of the line is also critical. So I have ordered a 7m length of 450 ohm feed line and plan to take this from the dipole centre, down to a 6 foot high fence and from there join it to a length of RG8X coax. The feed line needs to be about 16 foot and the coax to the shack will be about 12m. I will experiment with using a 1:1 current balun at the join to coax at the fence.
Doing things this way I hope will improve the antenna as at the moment the balanced line feeding into the MFJ ATU is running in a long curve under one of the arms of the dipole. Taking the feed line to the fence will take it away a right angled to the dipole.
Does this sound sensible?
Mike
