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Answers for you, Drew.

December 26, 2018 07:52AM avatar
Quote
Druid
Question Monte,
I am sure you are familiar with Calabash Digger's Cibola video showing no response on a silver half by the Cibola and the resulting brouhaha over it.
Yes, I saw it and as I was watching I knew immediately that calabash digger didn't have a clue about the proper tuning and behavior of a Tesoro Cibola.


Quote
Druid
I was of the opinion that the machine he tested is set for a ground balance that is a compromise value which is far off from the value of his very neutral mineral soil.
The model he used, the Tesoro Cibola, is a turn-on-and-go design which means the Ground Balance is internally preset. In theory, most manufacturers would 'calibrate' or 'adjust' the GB to a piece of ferrite to try and simulate 'bad ground' or a 'higher mineralized' ground make-up.

So at this point it has to be determined if that particular specimen he was using was either:

• Defective Possible, but I doubt it.

• Poorly 'calibrated' due to sloppy performance by the employees assigned to handle that. Possible, not expected based on all my Tesoro experience.

• Calibrated so that the Ground Balance was set properly for the supplied search coil it would ship with, and either:
a.. That coil went bad .. or .. Possible, but I have only seen that happen twice in 35+ years with a Tesoro.
b.. They used a different search coil that was well out-of-spec compared with the supplied coil and that could have thrown the Ground Balance way off (because it wasn't internally set for that coil). Again, it is Possible, and this I did see happen a few times back in the latter '80s to early '90st.

• Someone had opened that particular Cibola and tinkered with the GB trimmer and adjusted it way out of a proper setting such that it was too positive or even fully positive by that trimmer setting. Most Likely Probable, and has been the most often caused reason for poor Tesoro behavior that I have addressed.


Quote
Druid
In your opinion, is that the likely cause of the silver coin not responding or is there a true defect in the Cibola he tested?
No, I do not think it was a defective Cibola or search coil for that poor performance so many viewers witnessed. I feel the reason is because someone was guilty of opening the Cibola control housing and tinkering with the Ground Balance trimmer, setting it way too positive. That would have impacted the performance with higher conductive coins. Usually it only hampers detection of a Silver Dollar or even a Silver or Clad Half Dollar. I have seen some Tesoro devices that would even reject (not respond to) a Quarter and two that would not signal on a Dime.

A man-caused issue and not likely a detector design glitch.

Monte

"Your EYES ... the only 100% accurate form of Discrimination!"

Stinkwater Wells Trading Post
Metal Detector Evaluations and Product Reviews
'How-To' help for Coin & Jewelry Hunting, Relic Hunting and Useful Techniques.
monte@ahrps.org ... or ... monte@stinkwaterwells.com
503-481-8147
Fisher:(1), Nokta-Makro:(5), Teknetics:(2), Tesoro:(3), White's:(1)
Subject Author Views Posted

confused smiley Have you tested your detector(s) for Silver Coin Cache detection?

Monte 208 December 23, 2018 06:00AM

Re: confused smiley Have you tested your detector(s) for Silver Coin Cache detection?

SvenS 39 January 20, 2019 10:00PM

Re: confused smiley Have you tested your detector(s) for Silver Coin Cache detection?

Onearmwilly 37 January 19, 2019 01:41PM

Jason, 'Thank You' for contributing the results you had.

Monte 33 January 19, 2019 06:14PM

Re: Jason, 'Thank You' for contributing the results you had.

Onearmwilly 17 January 21, 2019 08:47PM

I have also tested quantities of coins in Jars, Boxes and Bags.

Monte 22 January 22, 2019 05:51AM

Re: confused smiley Have you tested your detector(s) for Silver Coin Cache detection?

Remfire 65 January 01, 2019 05:29PM

Roger, 'Thank You' for the test reply.

Monte 45 January 01, 2019 09:40PM

Re: Roger, 'Thank You' for the test reply.

Remfire 43 January 02, 2019 12:16AM

Re: confused smiley Have you tested your detector(s) for Silver Coin Cache detection?

Rich (Utah) 44 January 01, 2019 06:40PM

Is It All About Recovery Speed? Here are my Silver Cache EQ800 results.

Rich (Utah) 102 December 26, 2018 02:10AM

► INFORMATIVE READ: Rich's results with an Equinox 800.

Monte 93 December 29, 2018 04:33AM

► Monte's results with his 9 different models.

Monte 79 December 29, 2018 11:36AM

Re: ► Monte's results with his 9 different models.

RickUK 60 December 31, 2018 06:42AM

A few of my Test Details -

Rich (Utah) 58 December 29, 2018 07:36PM

Rich(Utah), here are the results of a Teknetics test a fellow asked for.

Monte 62 December 30, 2018 06:59PM

Teknetics Mark 1 results . . . .

Rich (Utah) 50 December 31, 2018 08:15PM

Rich(Utah), 'Thank You' for the information.

Monte 38 December 31, 2018 11:35PM

The Old Mark 1 . . . .

Rich (Utah) 45 January 01, 2019 12:23AM

Ooops, I forgot about sensitivity. . . .

Rich (Utah) 44 December 30, 2018 06:47PM

Rich, I understand and I understand.

Monte 53 December 29, 2018 11:55PM

Will your detector BEEP if you swing over a Silver Coin Cache?

Rich (Utah) 65 December 24, 2018 05:33PM

Comments and questions.thinking

Monte 64 December 25, 2018 08:16AM

Is Recovery Rate directly related to this Problem ?

Rich (Utah) 49 December 26, 2018 07:12PM

Rich(Utah) wondered: "Interested to know your thoughts here. "

Monte 59 December 26, 2018 10:34PM

Don't see much interest from others on this Monte. N/T

Rich (Utah) 58 December 28, 2018 07:37PM

Re: Don't see much interest from others on this Monte.

RickUK 54 December 29, 2018 11:05AM

RickUK, I appreciate your input.

Monte 49 December 29, 2018 12:23PM

A quick reply.

Monte 55 December 29, 2018 03:22AM

Re: A quick reply.

Druid 57 December 29, 2018 06:20PM

Drew, sorry, but no I haven't used a PI on this test scenario.

Monte 42 December 30, 2018 04:34AM

Re: A quick reply.

RickUK 47 December 30, 2018 02:20AM

Re: Don't see much interest from others on this Monte.

Hombre 88 December 28, 2018 08:25PM

Stack 5 Silver Halves on 1 big Silver Dollar and your Outfit would:

Monte 64 December 28, 2018 08:58PM

Re: Stack 5 Silver Halves on 1 big Silver Dollar and your Outfit would:

Druid 52 December 29, 2018 06:21PM

You will soon find out.smiling bouncing smiley

Monte 56 December 30, 2018 04:41AM

Re: Stack 5 Silver Halves on 1 big Silver Dollar and your Outfit would:

Hombre 55 December 28, 2018 09:24PM

Re: Comments and questions.thinking

Druid 68 December 25, 2018 01:25PM

Answers for you, Drew.

Monte 63 December 26, 2018 07:52AM

Re: confused smiley Have you tested your detector(s) for Silver Coin Cache detection?

Timbertodd 57 December 24, 2018 03:46PM

Todd, did you use one of the two described stacks of silver coins?

Monte 57 December 25, 2018 06:34AM

Re: Todd, did you use one of the two described stacks of silver coins?

Timbertodd 48 December 29, 2018 01:22PM

'Thank You' Todd. And those 6 silver dollars were naked?

Monte 51 December 29, 2018 02:21PM

Re: 'Thank You' Todd. And those 6 silver dollars were naked?

Timbertodd 51 December 29, 2018 03:21PM

Re: Todd, did you use one of the two described stacks of silver coins?

Timbertodd 61 December 25, 2018 08:26AM

5 should work but 6 is what I use to match 6 coins in the Half & Dollar stack.

Monte 47 December 26, 2018 06:59AM

Re: confused smiley Have you tested your detector(s) for Silver Coin Cache detection?

D&P-OR 83 December 23, 2018 11:09AM

Yes, they didn't. ... or ... No, they did.

Monte 87 December 23, 2018 04:32PM



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