[size=large]Yes![/size]
Ronk said:
I just saw a video with the F5 using a 11DD coil and and the Bottle Cap gave a Low tone when the Tip of the 11DD was over it.I'm not sure how many tones he was using but the Bottle Cap Did have a low tone and the when the 11DD coil passed over a coin, the coin signal was the same High Tone for the full length of the coil. The bottle cap Did give a High Tone in the middle of the coil and a Low tone at the tip and rear of the coil. My Question is..Does the Omega do the same thing with the 11 DD coil?
You can get a 'proper' Audio Tone ID response as well as a 'proper' Visual Target ID and VDI response with virtually ANY modern motion-based Discriminator.
Rejecting common crimp-edged Bottle Caps was a rather easy matter for the good old TR-Disc. models to deal with because they were (
what I refer to as) True Progressive Discriminators. From common ferrous trash up through low-end non-ferrous junk and up to Pull-tabs and Screw-caps, the variable Discrimination worked quite well.
Then, almost all-of-a-sudden, we were blessed with the misery of motion-based Discrimination. Yes, there are some benefits and certainly some improvements, but ever since the Bounty Hunter Red Baron about '78, the first motion-based Discriminator featuring what George Payne called S.P.D. (Synchronous Phase Discrimination), we have had to learn to deal with some of the quirks that accompany it.
One of the challenges of a motion Discriminator, which it trying to deal with and ignore/reject the Ground Signal (1Hz to 2Hz) and still pass along an accepted higher-conductive metal target signal (ferrous or non-ferrous) is that some problem targets will exist. Most annoying are the non-ferrous or magnetic-based targets like the Bottle Cap. While those blasted critters will
usually be attracted to a magnet and should produce a low 'Iron' reading, they are also man-shaped into a form that is a bit more conducive than just the alloy it started out as.
By late '78 and early '79 I had used motion-based discriminators (all 4-filter type fast-motion designs back then) to know that Bottle Caps and some similar-shaped or types of magnetics junk posed a real annoyance. With some experimenting I leaner how to 'CLASSIFY' potential iron targets such as Bottle Caps and I started teaching some of these techniques in my seminars back in 1981.
So, for some 30 years now, I have been using (with very good success) and teaching two methods to help
classify some questionable target, mainly Bottle Caps. I coined two terms to describe these techniques:
"Quick-Out" and
"Edge-Pass Rejection", usually just called "
E.P.R."
I have used these two techniques with every modern make and model I have owned, borrowed, or checked out and it doesn't matter which brand or model VLF-Disc. (motion Disc.) unit I use, or if the search coil is a Concentric or Double-D design, you can still 'classify' many commonly encountered Bottle Caps.
Note that I said
usually and also
many. It won't always happen due to odd shapes and positions, depths in the ground or ground mineral make-up. But it is useful enough that I have enjoyed success for over three decades now. These techniques can be used in three different ways as follows:
1.. Before we had such things as Target ID or audio Tone ID I used "Quick-Out" and/or "E.P.R." to classify potential Bottle caps and similar iron just with the audio response. As an example, when I used the non-display Tesoro's in the '80s and Tesoro and White's Classic's in the '90s, I would HEAR an iffy-to-good response from a possible Bottle Cap. As a rule they are relatively shallow, as are most coins, but with the modern motion-based Discriminators they could give a good, or almost good, audio response.
If I selected the All metal pinpoint mode I could size and shape a target and the ferrous stuff
usually produces a broader or wider response than does a similar-sized non-ferrous coin. That was a first clue. Then I would do a short and brisk "Quick-out" sweep across the target with the coil's center and if it was likely iron (such as a Bottle Cap) it was then silent. Sometimes it might not be totally silent but only a broken signal so I then added the E.P.R. technique. More often than not, the bad target was then rejected like it should have been.
2.. When using a Visual Target ID model, whether a needle type meter or an LCD design, I noted that, as I suspected, the techniques then produced a solid Iron TID response (and VDI on those models with it). In normal search I might get a close to lock-on coin reading or maybe an iffy and jumpy display during the normal sweep, but once I pinpointed the target and then used the two techniques, Bottle Caps and other similar trash were ignored and left for others to recover.
3.. Finally, with the addition of Tone ID models, that expanded the audio and Discriminate range so that most common 'Iron' produced the lower bass-like audio tone, which complimented the visual Iron Target ID.
As I stated, all makes and models and all coil types can accomplish this task. However, you do NOT want the coil to be too close to the anticipated target. Also, all Double-D designs are known to not be as good at discriminating as are the Concentric type coils, and because of their physical design, the actual position of the coils 'edge' might have to be just over the suspected Bottle Cap or even maybe close-to but just slightly away from the B.C. It is like any other method we use with our modern detectors to try and get the best performance from them.
I have these techniques described and ready to be printed out under the
Tips & Techniques section on our AHRPS.org site.
I enjoy my Omega as it is one of my current useful models in my personal detector battery, and I generally use the stock 5
