The coil in question was explained (and easy to understand because of electronics training back in the early/mid '70's), and now I will end up with another one in the bag later this month before a relic hunt in central Oregon next month. Ah well, only greenbacks that would have gone to Bud or Jack anyway.
Thanks Kevin-------ordered the Eclipse 6x10 and should have it on the 20th in time for the club hunt on the 24th and the trip to central Oregon in May.
4-25-2016----Went out yesterday with the 6x10 and I love the thing.