Odanscoils
Well-known member
Took it in the front yard for a few minutes today.
Ground Balanced it.
Much smoother. The VCO will take some getting used to though.
Monte I understand you said the coil that came with the machine is tuned to the machine.
So I'm wondering.
It came stock with the DD coil.
Would that mean it may perform less with a concentric coil ?
Would a smaller say 5" round DD work better than a concentric coil. Being the machine is tuned to a DD ?
Here's the coil it came with.
Ground Balanced it.
Much smoother. The VCO will take some getting used to though.
I re-read posts in this thread and have a few comments:
* Not all of the SW is highly mineralized.
* When I had my Tejon's, 90% of where I hunted was highly mineralized and had a high Iron content.
* Unless doing coil comparisons, I kept a Concentric coil mounted and never had a problem GBing.
* Most Tesoro models were designed with the Disc. mode GB reference with a somewhat positive off-set from the All Metal models GB setting. For peak performance in the discriminate mode, I like to Power Balance to have a most efficient GB setting in Discrimination. You always want the best GB for the search mode you are using. And that me a ns not too positive or too negative. If 'off' too much in either direction, you can experience falling.
* As a rule, I like to either just reject Iron Nails or have a setting low enough to 'just barely' hear iron nails or any more-conductive Ferrous targets. Keep in mind that the higher the Disc. setting, the more desirable targets are to be rejected. Therefore, I favor a low Discrimination setting.
I mentioned this because earlier you made a comment about testing detectors in your house and using the Iron Nails in the floor. This can lead to a too high Disc. level depending on what detector model is used. The iron nails in the flooring Are mostly going to be driven in so that they are vertical. In such an orientation to the search coil, swept horizontally, they will usually have a uniform EMF shape and be more easily rejected (Discriminated). Typically, the VDI read-out will be a lower number and vary only slightly on repeated sweeps.
If the same Nail is in a horizontal position and swept from different approach angles, it will usually produce higher VDI numbers that can be spread over a broader range. Thus, if a detector just barely rejects a vertically positioned Iron Nail, it is likely to produce sputtering signals to a very good 'Beep' that would call for an increase in the Disc. setting to cleanly reject them.
The result? If a horizontal Nail is barely rejected, the detector / coil combo has a good chance to unmask a nearby keeper. However, if the Disc. is set to just reject that horizontal Nail, good. But if a Nail is close to a good target but positioned vertically, that higher Disc. setting might not be able to recover from the stronger rejection to unmask a good target. Thus, use the least Discrimination you can tolerate to get the best performance in a site with a lot of ferrous debris.
* From my personal experience as well as watching others do some coil comparisons, I have determined most Tesoro models work better with a Concentric coil than they do a Double-D. The Tejon's I had or watched others use, definitely favored Concentric coils to provide the best performance.
>> Unless someone opened the Tejon and messed around with any trimmers, it should be working well. Just read through the Owner Manual again and make sure you are familiar with it and all available settings.
Monte
Monte I understand you said the coil that came with the machine is tuned to the machine.
So I'm wondering.
It came stock with the DD coil.
Would that mean it may perform less with a concentric coil ?
Would a smaller say 5" round DD work better than a concentric coil. Being the machine is tuned to a DD ?
Here's the coil it came with.