Hi folks, I was given a couple of LB mobile antennas, and I have moved them up to 6 meters. (I drilled a hole in the plastic case, and shorted out 2 turns (soldered across them). It seemed to tune right up to 52 mhz.
However, I noticed that the position on the back deck of my car really made a big difference in it's resonant frequency. I was using a MFJ259, and in one spot (not centered), I have a perfect 1:1 @ 50 ohms - a very pronounced 'dip'. When I move it around, the swr goes up, and the 'dip' is not as pronounced. The Bird confirms that the transmitter isn't as happy in other places on the back deck. The antenna is an effective quarter wave. Is this indicative of all LB mobile antennas, or just this type? I remember 'way back when', I used a full quarter wave on my car, and it tuned right up without any funnies. (big spring & all). Thanks, Tim
