"The transmission line will radiate on an OCF?" That is not alway true ! If you use the correct balun the transmission line WILL NOT RADIATE !
I have three Off Center Fed antennas and all three are fed with a 4 to 1 Guanella Current Balun. I also have an RF probe and have checked each
antenna on all of the bands that it is designed to operate on. I put the RF pickup on the transmission line and set the the probe to the lowest
scale. I transmitted on all of the bands and there was ZERO RF detected on the shield of the transmission line.
The OCF80 I use in the primary station uses the GU4-HF-5KW. I run my home brew 3CX1000A7 amp into it on 10, 12, 17, 20, 40 and 80 meters. That's
1500 watts and I have ZERO issues with RF in the shack......and my station is on the second floor.
I have even gone as far as to put a trap and an RF ampmeter on the ground going from the station to the ground rods in the yard to see if any RF was
on the ground system. None there either.
To say, "The transmission line will radiate on an OCF" as a blanket statement is not true.
If you build a simple dipole incorrectly you can have RF issues. Build an OCF correctly and use the proper balun and you should not have any issues.
Barry, KU3X www.ku3x.net