Thanks for the update, UWL! It seems my list is out of date, I stopped following the progression some time ago, though at one time I was very interested in the history of the several detector companies that are now encompassed by First Texas.
Pacific Northwest Instruments (PNI) and Bounty Hunter were two early manufacturers of detectors in the 1970's. Eventually BH bought out PNI. Much of the underlying technology of the BH lineup stems from several very innovative designs brought forth by George Payne. His last, and probably best design for the original Bounty Hunter company was the Big Bud series. That design would eventually serve as the basis for the QD I, and all that came after. George went on from the early BH company to make more magic at Teknetics. For a time, it was looking good for Tek, and they ended up acquiring the combined patents of PNI/BH. However, times were soon to become tough in the detector industry and First Texas stepped in at the last minute and acquired the remants of Tek, which was in court in a battle over warehouse storage fees for the remains of Tek's inventory. Prior to this, First Texas was marketing several low-cost designs through Fingerhut and other mass-markets. I actually own one of these pre-BH First Texas detectors! As I say, it was a very wise decision and the timing was right for FT to make a giant leap forwards..
Dave Johnson, another legendary detector designer, brings to the table his experience with the Fisher name, as well as some White's machines. Other designers whose manes I'm not aware of also contributed. Some of the basic technology that First Texas holds the patents to date back to 1975 and before. That's a rish heritage of successful and popular designs to draw from!
Though the marketing decisions of First Texas leave us wondering sometimes, it's good to know that over the years, they have made extremely wise choices in acquiring the rescources of underwater or floundering detector manufacturers. They have managed to thus preserve and carry forwards a lot of the pivotal technology of the past sveral decades.
Not much to say, guess I'm just waxing poetic!
-Ed