Good morning all. My father in law was an avid rabbit beagler his whole life and my wife and I took everything over including his pack of dogs after he passed. Going through a box last week I found an old Dog Radartron shock collar. From an internet search looks like DT Systems made them. Do any of you have any history/experience on them- when they were made, how good they were, when they became obsolete? Just curious here. I love digging into stuff like this. My guess is it was the collar system before TriTronics became the rage. He left behind two Tritronics sets, which are tanks and still work to this day even though we just upgraded to Dogtra Pathfinders, which I'm loving so far.