Posted by RIchS on 3/22/2009, 5:04 pm, in reply to "Re: Discovery TF-900 & Whites TM-800"
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Yes, Paul, I remember Ed. Remember that the two box will also locate voids such as underground caves too, when set right. Of course that is the same as septics! Of course the older Whites TM800 was the same circuit as Discovery uses. Some of the boards that were computer designed were also used in that model, but only a little later.
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