I’ve seen quit a bit of negative reviews about this antenna so I took a chance. The low price, high gain almost seemed too good to be true.
The antenna needed some work before installation. I didn’t like the screw connecting the two copper sections of the antenna inside the fiber glass. Getting rid of the screw and a portion of the copper changed the tuning slightly but not much.
I didn’t trust the o-rings so I added epoxy-based glue to the joints. I’m not going to take it down any time soon anyways. I like the final result. It’s sturdy, seems reliable. Time will tell.
Obviously the antenna has some build issues but they can be fixed quite easily. I don’t know maybe the JTB3 is better but I’m pleased with JTB2.
Antenna is a slightly modified G5RV made of twisted copper wire, 102ft long + isolators and extra steel wire for hanging. Height is about 30ft, slightly sloped.
Performance is pretty good for a multiband dipole but I don’t have other reasonable antenna to compare it to right now.
Noise levels are high in the lower bands 3.5-7 MHz but that’s mainly due to band conditions. An additional tuner / bandpass filter may improve the situation a bit. I may look into that in the future.
1.8MHz not good at all. I’m unable to tune the 160m. Getting bad SWR (like 2.5 or worse). Receive still works though.
60meters also has poor performance and a high SWR but I’m not really working 5.3MHz at all. Not much activity there.
6m performance is even worse but I never expected it to work on 50MHz anyway.