Ugrade CL to AM

[WV62]

Just wondering if anybody did air testing on the F75 upgrade going from the CL processor over to AM? My detector is still about 3 or 4 days from getting back from the second send for upgrade repair or I would run a quarter over mine.
I can remember a lot of testing going on from DE and BP to AM, it would be interesting if we get even more depth in AM from CL.

Ron in WV

 

[WV62]

I just got my detector back from the second send for upgrade repair (back ground light) and I ask for new battery springs, all looks fixed. The letter they said they reloaded the upgrade software, checked my coil, and field tested the machine. It now boots up with a 03-15-14-00-92.

A little later I will fire up the machine and get air test numbers in the CL to all metal mode with all my coils and I will post the completed chart. After that it will be back to hunting, the snow is just about gone.

Ron in WV

 

[squirrel1]

Here's some info, can't say where it came from, but it's accurate good data.

Let's start with this: ONLY the ID mode, 9.0, 11" elliptical DD coil, Sens 99, Disc '0'. Remember....... the data provided below is from a batch of PRODUCTION RUN units. I can (nearly) say..... disregard previous LTD2 (especially proto units) data.

Nutshell........... utilizing only a clad dime in Florida low-mineral (primarily silica/quartz) dirt:

bp = 11.7"
cl = 11.8" (Exceptionally 'delayed' audio response)
je = 11.2"
pf = 11.2"
de = 11.1"
bc = 10.1"
FA = 9.8"





Okay......... now it's time for the F75LTD/2 with 5" DD coil report. This is with 9.0, Sens on '99', Disc '0', Grnd Bal '90'. This is with a buried clad dime in Florida inert dirt.

bp = 10.1"
cl = 10.0" (Elongated audio response)
je = 9.3"
pf = 9.2"
de = 9.2"
bc = 8.8"
FA = 8.9"

Keeping all settings the same......... but this time in 9.1:

bp = 9.8"
cl = 9.6" (Elongated audio response)
je = 9.1"
pf = 9.0"
de = 9.0"
bc = 8.5"
FA = 8.6"

All-Metal Mode. This is a scientifically difficult mode to report...... as threshold/ears/re-tune can dictate final resultant; yet, some good data can be extrapolated. First, , , , for all testing, I used 11" DD coil, 9.0, Sens 99, Ground Balance of '90' and 'Motion' mode. Buried clad dime in Florida dirt. I was always seeking to hear a slight, but audibly intelligible threshold change.....enough to be categorized as a positive target response. Also, the process modes that you can select whilst in ID mode...... carry over to the all-metal mode. (With several unique observations I will discuss later).

bp = 11.6"
cl = 11.6" (Elongated audio response)
je = 11.0"
pf = 11.1"
de = 11.0"
bc = 10.1"
FA = 10.4"

Notice how there is not as much linearity carried over from the ID mode results. And notice the All Metal depth was slightly less than ID mode. Largest contributor for this phenomenon/resultant is due to Florida's low mineral dirt. As a qualifier...... I must say this: Some of the process modes required changing the 'Threshold' a small amount..... so as to maximize detectors audible intelligence.

* Ironically.......... performing only air-tests........... and depth/performance is nearly always at maximum performance/depth....... even when switching through (and testing) all of the different process modes. The only change/difference is...... the 'length' of the audio response. Invoking 'cl' mode ... (then switching back to All Metal mode).......... and the targets audio response is elongated.

* Testing the 'Static' mode is too interpretive ...... with largely varying resultants. When you reset the SAT/threshold audio...... by pulling the trigger (and releasing)..... THIS ALONE can have a dramatic effect on depth/performance; hence, too many variables preventing solid/repeatable data.

Okay. 9.1 performance/results:

bp = 11.5"
cl = 11.6" (Elongated audio response)
je = 10.9"
pf = 11.0"
de = 11.0"
bc = 10.0"
FA = 10.3"

There is minimal differential/delta in performance/depth whilst comparing 9.0 to 9.1........... All Metal -to- All Metal.

 

[WV62]

Well here is what I come up with, doesn't fit with my other numbers but it is what it is.

Ron in WV

 

[squirrel1]

Ron,
Here is I think some good yet surprising information. And it suggests a person may want to change channels on a moderate deep to deep target to see if a better performing frequency can be found. This also from same source as the other info I supplied.

ALSO noteworthy: In my test-garden...... with the new LTD2....................... with freq selection F7, I encountered a 2.7" depth loss difference on a clad dime.... when compared to the other (F1-F6) freq's/channels. There was NO audible EMI on any one (of the 7) channels. The next day, F4 was the least-performing channel..... and F7 was one of the better performing channels. Soooooo....... How would you know that you are operating on a 'reduced performance' channel!
Moral of the story = Do not think... for one moment................ that EMI & silent EMI does not affect other detectors!

 

[Coin Rescue Inc]

I just got my detector back from the second send for upgrade repair (back ground light) and I ask for new battery springs, all looks fixed. The letter they said they reloaded the upgrade software, checked my coil, and field tested the machine. It now boots up with a 03-15-14-00-92.

A little later I will fire up the machine and get air test numbers in the CL to all metal mode with all my coils and I will post the completed chart. After that it will be back to hunting, the snow is just about gone.

Ron in WV

THEY SENT YOU A LETTER WITH YOUR UNIT !!!!

 

[WV62]

Ron,
Here is I think some good yet surprising information. And it suggests a person may want to change channels on a moderate deep to deep target to see if a better performing frequency can be found. This also from same source as the other info I supplied.

ALSO noteworthy: In my test-garden...... with the new LTD2....................... with freq selection F7, I encountered a 2.7" depth loss difference on a clad dime.... when compared to the other (F1-F6) freq's/channels. There was NO audible EMI on any one (of the 7) channels. The next day, F4 was the least-performing channel..... and F7 was one of the better performing channels. Soooooo....... How would you know that you are operating on a 'reduced performance' channel!
Moral of the story = Do not think... for one moment................ that EMI & silent EMI does not affect other detectors!

Spuirrel1,
Until reading your post and kind of thinking about using the freq shift as a tweaking tool for max performance. To use it like this I would think you would need to run a quick air to small coin on the ground test looking for best response from one of the frequency shift numbers. In the past about all I ever used it for was to quiet the machine down.

Ron in WV

 

[WV62]

I just got my detector back from the second send for upgrade repair (back ground light) and I ask for new battery springs, all looks fixed. The letter they said they reloaded the upgrade software, checked my coil, and field tested the machine. It now boots up with a 03-15-14-00-92.

A little later I will fire up the machine and get air test numbers in the CL to all metal mode with all my coils and I will post the completed chart. After that it will be back to hunting, the snow is just about gone.

Ron in WV

THEY SENT YOU A LETTER WITH YOUR UNIT !!!!

Yes I was surprised they actually said anything. But it said after inspecting, the following was completed to upgrade/correct the unit. Upgraded Software and Field tested Unit They also side inspected and tested the coil and it was found to be in good working order.

The didn't say anything about the backlight and battery contact springs, but both items were fixed.

Kind of nice to get a few words of what went down.

Ron in WV

 

[WV62]

After testing the CL to AM and getting surprising low numbers I thought I would put on the 11"DD coil and run it through all the disc processors and the BP to AM just to make sure I didn't lose any with the reloading of the software and repairs.

So I added a second line for the the 11" coil in read for after repair, you will can see I didn't lose anything.

Ron in WV

 

[squirrel1]

Ron,
Here is I think some good yet surprising information. And it suggests a person may want to change channels on a moderate deep to deep target to see if a better performing frequency can be found. This also from same source as the other info I supplied.

ALSO noteworthy: In my test-garden...... with the new LTD2....................... with freq selection F7, I encountered a 2.7" depth loss difference on a clad dime.... when compared to the other (F1-F6) freq's/channels. There was NO audible EMI on any one (of the 7) channels. The next day, F4 was the least-performing channel..... and F7 was one of the better performing channels. Soooooo....... How would you know that you are operating on a 'reduced performance' channel!
Moral of the story = Do not think... for one moment................ that EMI & silent EMI does not affect other detectors!

Spuirrel1,
Until reading your post and kind of thinking about using the freq shift as a tweaking tool for max performance. To use it like this I would think you would need to run a quick air to small coin on the ground test looking for best response from one of the frequency shift numbers. In the past about all I ever used it for was to quiet the machine down.

Ron in WV

The gent that provided data recommends, first do air test to find best freq using freq shift, then check on in ground target,, then whatever works best on the inground, stay
with it. I guess a person could after they find an inground target, start running sens down, then check in different freq, to see which one yields best resoonse with lower sens, then after decision, crank it back up.

 

[MarkCZ]

One has to keep in mind that a frequency shift isn't to another channel, these units are a single frequency design. Unlike a CB or 2 meter radio channel where you go up or down a full channel, a frequency shift is just a slight shift or offset of the same frequency.

Here is an example!

Lets say a single frequency detector operates at 7.5kHz, what the frequency shift would do is something like up to "7.8kHz" or maybe down to "7.2kHz" it doesn't go to 8.5khz or 6.5kHz

So the range selection isn't going to do a BUNCH to improve target depth, or target ID unless it helps to offset EMI interference and gives the user a more stable operation. Another big plus to the frequency shift control is if two people are operating detectors that are on the same frequency in somewhat close proximity to each other, one or both could use the control to reduce detector cross-talk, you take the 7.3 and I'll take the 7.8. We still don't have a full channel spread but we would be offset enough to reduce interference.

So, there is a difference between a frequency shift and selecting another channel.
The frequency shift control is an aid to the operator and testing its effects and learning the best use of it is always a good thing.

Mark

 

[Bryannagirl]

I think where you will find freq shift affecting depth is by reducing EMI - EMI can affect usable depth so reducing by finding the quietest freq results in more depth. Maybe a better way to say it is if with no EMI your detector can hit a 10 inch dime and with heavy EMI you only can get a hit at 8 inches. Adjusting the freq helps obtain you detectors maximum depth(which is 10 inches on a dime)