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DeepTech

Compadre with 7" coil - where is the sensitivity pot?

M

marcomo

Well-known member
Does anybody know (or can show a picture or schematic) of where the sensitivity pot is on the older style (with the 7" coil) Compadre?

I know I risk voiding the warranty by opening it up, but it's easy enough to take off the face plate and I bought one cheap. I'd like to tinker with the sensitivity and see if I can snag just a little more depth. Not to do a full scale mod with extra knobs and such, just to adjust the pot.

All the schematics and photos I can find on the net are for the newer style Compadre. Apparently the newer Compadre with the 5.75 coil has a different circuit board than the older one with the 7"coil.
 
If the board in your Compadre looks like the one in the top photo, the sensitivity pot is the one inside the red square at upper right. If you adjust it, be careful as the pots aren't hard to damage and it only takes a slight turn to make a pretty big difference so don't get carried away. Mark the position it's in now in case you need to restore it to the factory setting. If your Compadre board looks like the one in the bottom photo, it's the pot at the top of the board inside the red square.

107npk6.jpg


200pldg.jpg
 
JB(MS) said:
If the board in your Compadre looks like the one in the top photo, the sensitivity pot is the one inside the red square at upper right. If you adjust it, be careful as the pots aren't hard to damage and it only takes a slight turn to make a pretty big difference so don't get carried away. Mark the position it's in now in case you need to restore it to the factory setting. If your Compadre board looks like the one in the bottom photo, it's the pot at the top of the board inside the red square.

107npk6.jpg


200pldg.jpg
Click to expand...
Double thanks, JB! Would you recommend "power balancing" with the ground pot or have you heard of anyone bothering the g/b.? Thanks again. Ken
 
As far as I know none of the four or five local guys who have, or had, Compadres have power balanced theirs, but some guy posted on one of the forums a couple of years ago, maybe Carl's detecting equipment forum, that he did his.and it added an inch or more in depth. It's not hard to do, and if you have tough ground it would most likely make a difference. If you try it, be sure to mark the position the pot is in before you start so you can put it back to the factory setting if necessary.
 
Thanks again, JB! The top picture was the one. What threw me at first is that the blue NPs were yellow in mine. Otherwise, the same.

I've got it set now to get a solid signal when airtesting a silver dime at 6 1/4" with good sweep stability over ground. Discrimination between foil and nickel. Had it up to almost 7" but I had to back it down a couple times because of the chatter. After using an LTD for about a year I'm used to "working into the noise," but that's not what I want to do with a Compadre.

So it's a half inch deeper now and still seems very stable.

I also found out that counter-clockwise increases sens, clockwise decreases it.

I'm gonna stop now while I'm ahead.

So what is power balancing the ground balance, and how is it done?:devil:
 
Monte is the one who coined the phrase "Power ground balancing" and was the first to post how to do it on the forums. Below is how it's done, I wrote the first paragraph but the rest of it, the bold text, I copied from a post Monte made a few years ago on another forum. The ground balance pot is the other pot, at bottom center in the photo of the board in your Compadre, and again, mark the current position and be careful when making the adjustment.

Set Discrimination at the minimum setting, turn on your Compadre and scan a spot of ground to make sure no metal is present.

[size=small]Quickly bob the search coil towards-and-away from the ground, going from the 6"-8" height down to about
 
JB(MS) said:
If the board in your Compadre looks like the one in the top photo, the sensitivity pot is the one inside the red square at upper right. If you adjust it, be careful as the pots aren't hard to damage and it only takes a slight turn to make a pretty big difference so don't get carried away. Mark the position it's in now in case you need to restore it to the factory setting. If your Compadre board looks like the one in the bottom photo, it's the pot at the top of the board inside the red square.

107npk6.jpg


200pldg.jpg
Click to expand...
 
I did both my Compadre and my Silver umax. I went too far each way when doing it-it doesn't take that much. Too far positive and you'll get an overrun in the threshhold-kind of annoying. Too far negative is not as noticeable, but the signals have shorter duration-like a clipped sound in bad ground.
 
Hi to all

I have the amigo 2, which im guessing is this board?
Can anybody explain what the pots are I've highlighted in green please?
Thanks
Steve
 
One is ground balance the other is disc.
Don't know which is which, and if you mess up either one you will have problems.
 
Steve Dixon68 said:
Just finding it very interesting REVIER :)
Click to expand...

Just be careful and mark the pots before any adjustments if you attempt that.
A few have tried adjusting these, didn't mark them and messed them up so bad that they had to be sent back to Tesoro to get it all straightened out.
Service for original owners is still free for life but they finally got smart, did the math, and started charging $50 for service on units that are second and third hand.
 
THis is a link to my Compadre conversion. It has most of the data in it. http://www.findmall.com/read.php?22,1942952,1952727#msg-1952727
 
To be specific, I'd like a sensitivity and ground balance installed. I wouldn't expect a factory or "pro" job, just knobs to turn and sturdy soldering as I can't solder well myself.
 
middle GB
the other one disc "dont touch it" or if you looking for indian coins some one post how to tune it
 
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