I just found this site through searching about this Treasure Hunter metal detector. I bought my Phantom in the 1980's from Richard at the Houston Livestock Show & Rodeo, where he had a booth selling them one year. He gave me some instructions and a demo of how to use it, along with a cassette tape with instructions on how to set to discriminate different types of metals and what tones it makes for each.
I used it for many years with some successful finds. My favorite was finding an old Timex watch near downtown Houston. It was about six inches deep & when I dug it up & winded it up, it still worked! I always thought about sending the story to Timex for their "Takes a Licking but Keeps on Ticking" ad campaign, but never did. I used the Phantom for several years until I took it to the beach & one of the potentiometers seized up afterwards from exposure to the salt air.
I still have the Phantom, manual and instruction cassette & after seeing how great it was compared to what is available now at a reasonable price, I want to repair it. Also, after seeing all of the praise folks have given it, I really want to get it functional again. Now that Richard is gone (RIP sir) along with his business, the "lifetime warranty" no longer exists, but I was planning on repairing it myself anyway, if possible.
If anyone knows of a good place to take it around the Houston area in the event that it needs repair beyond the potentiometer replacement, please let me know. Thanks & Happy Hunting!