My curiosity has impelled me to look into this null line a bit more. So I built a different (round) TX coil for my locator to see what i could see. I'm getting the same results as previously reported--45 degrees off the center of the coil. I guess that rules out coil shape as being a factor. Probably should say none of this is "scientific", just my own addled observations. Not trying to nit-pick here, just want to find out why things are not the same, with the hope that maybe i can find some "issue" causing the stifled performance of these pistol type locators.
I know people say to keep conductive objects away from the TX coil as this creates eddy currents that distort the TX coil field. I would suggest this is the area to examine more closely. The original pistol locators had the coil mounted up away from the electronics. I don't know but that's where I would experiment. Well, anyway, just a thought. I don't have one to experiment with. Shouldn't be that difficult to find out, just mount the coil up above the ferrite the same distance as it is below. Much like the original only a bit higher. Yes, it will be more bulky but if i had one I would try it. Like Donald Trump asks "What do you have to lose?" I'd say this much, it can't hurt the performance.
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