Anyone tested this thing out on HF? Comet UHV-6 40/15/10/6/2M Mobile Ant. 2.15bDi gain(2M)/5.5dBi gain(440) 48"-83" PL-259 Any sense of the radiation efficiency, pattern, etc? Need something on my van and the price is very reasonable in comparison to a mobile antenna with gain that only offers 2/ & 440. Thanks! & 73, doc KD4E