Yes, what away for an introduction...Jetco Mustang, Jeeze.
I started metal detecting in 1971 when my dad finally gave in and bought me a Jetco Treasure Hawk for my 11th Birthday. I actually wore small holes in the bottom of the coil.
I was hooked. Traded to a Garrett TR in 1973-74 & kept upgrading. I actually made a career using metal detectors, partially anyway, working for the City of Fort Worth Water Dept. for 31yrs. 17yrs. as a Supervisor. I first learned how to use the Gemini II back in early 80's. Tracing lines inductively/conductively & also using as a two box unit locating MH's & water valves etc.
I actually located an old 24" cast iron main laid in the 1920's near downtown with a backhoe standing by...The main was a bit over 14' deep. It took a while, but I had it dead on.
Anyhoo...enough of that, I was given an old Jetco Mustang in 1991 & it has been hanging in my garage ever since, never paid much attention to it until recently. I put a new 9V battery in & it actually works! However the tuner needs a good cleaning. I completely broke down the old unit except for the circuit board. The single knob on the Mustang secures board to upper housing & I got the nut loose with no issues, however, I cannot get the black plastic knob off the plastic spline? No set screw is visible & I have cleaned & lubed the spline area. I am wondering if there is a set screw under the top decal of the knob? I just don't won't to damage or mar this old vintage unit.
Any help would surely be appreciated.
I have read Steve's articles & reviews over the years & they are absolutely informative & helpful.
Thanks to all!
cowtownkid