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Excalibur 2 Disc. knob

BeachBum007

BeachBum007

Member
So...My Disc. Knob on my Excalibur 2 that is out of warrenty is spinning...Does anyone know how to take apart and fix it my self? If that is possable?(Broken part i dont have?) So i wnt outside put a pop top on the dround and rotated clockwise till pop top blanked out..that is spost to be around 11 on disc. settings, But then after turning it down and back up..it would register...I cant establish a constant point when it will blank and not blank...On the other hand..it seems to be stuck in Disc. #1...Cause everything registers besides iron and silverware...all coins,silver,gold..etc sound perfect..I hunt in Disc #1 anyways and never turn it up cause the excalibur 2 blanks on iron anyways..so i figure to just Leave it how it is untill i have to send it in for another problem down the road(Knock on wood)...ANY IMPUT FROM ANYONE...SHOULD I SEND IN AND NOT HAVE IT FOR TWO TO THREE MONTHS>>>OR JUST NO WORRY BOUT IT...! IS THERE SOMETHING I DONT KNOW>>>? Thanks....

The Bum
 
You can get a knob at Radio Shack with a set screw that will be a quick fix or some of the forum sponsers have sets that work fine. When turning the discrimination knob just turn it to the left until it stops do not force it. Once you install the new knob check very easily if it will go any more to the left then adjust accordingly. HH :minelab:
 
Thanks...i was actually in the process of putting on the new ones with set screws...when the dial got turned past the stop point...i wish it was a simple as the knobs on the actual dial..but its not..the dial is broken internaly....it is stuck in disc. Setting 1 one...witch isnt that big of deal...but i want my excalibur to be fully functioning
 
Sounds like you have determined the problem. Internally the Disc/Pinpoint switch has a brass rod that is soldered to the top mainboard. Usually the addition of new knobs before really realizing how much torque can be applied causes the pin to become unsoldered and/or bent and the internal potentiometer to exceed the stopping point. This can cause the sympton you are describing and possibly worse, the pin can come completely loose and fall against something else and short out the board. This is somewhat of a design flaw that has been discussed in detail previously. Hope this helps.
 
Thanks for info...but is my disc. Level knob...not the pinpoint...i think they are two different internal workings..am i correct..?
 
Sorry about that. You are correct. Same potentiometer actually but no mechanical brass stop. The internal stop inside the pot has broken. No worry about the shorting potential just where the pot is registering. If you can make sure it is at the far left your probably fine.
 
Thats what i was lookin for...thanks so much for the info...i needed to know if i was going to damage further by using....
 
Hey There
I have a question about my excal setting in Black sand, or if it is broken ? I found my FIRST GOLD RING...so ive been doing some tests with it to try and learn the sensitivity settings and threshhold better..If you remember my Disc sensitivity pot/knob broke...about month and a half ago, right after i bought my Excal...So, i Placed the ring in a 12 inch hole in damp sand and didnt fill it in, with sensitivity at 2 o'clock position and in Disc. mode i swept, i got a null to buzz, so cranked up the sensitivity to 10 o'clock, no GOLD TONE, all the way up, nothing but broken signals...So i placed ring on sand, Gold Tone came in about 4 inches away...with sensitivity all the way up...Could this have something to do with the broken Disc...is it possable for items that have been discriminated to register normally if EXTREMELY close to the coil...? Should i just send it in and have MINELAB go through it...? Could it be the black sand really affects Excals...?or am i just not FINDING the right combination of settings...?
Any Help is greatly appriciated...! Thanks
 
http://www.youtube.com/watch?v=7sP8r2oCoAY

http://www.youtube.com/watch?v=zwafebiHx-s
 
connectors for remote disc switch beach bum.......
 
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