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Re: Tesoro goldan umax new tone vs old tone

April 03, 2020 05:03AM avatar
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Harold,ILL.
He matched it up with the 8" Brown donut coil and it is a perfect match. ---- I also bought a 5.75" coil that is hot too as dug a war nickel with it over 8" easy with a high tone. ---- They are very picky though with coils as tried a 7" Precision and a 10.5" Concentric and they both mixed the tones past 5". But The 8" and 5.75" work perfect.

Glad to hear your Golden µMAX is working OK for you, at least with the two search coils. 'Matched' is a god word to use with all of the "turn-on-and-go" Tesoro's because the search coils used needs to be 'matched' or 'calibrated' which are just terms to refer to Ground Balance effectively for that specific model. That was the one annoying weakness in circuitry design with most Tesoro's, the need to have a very 'proper' or 'functional' GB based on the specific search coil attached.

Tesoro used the word 'calibrated' when someone had a detector and two or more search coils and noted that the detectors was 'noisy' or 'falsing' a lot. They would ask the owner to send in their detector and all the search coils to have it 'calibrated', and that simply meant they would check the coils to make sure they were all 'in spec" and then would tweak the internal GB trimmer so none were going to be noisy from having a too-negative GB. that only meant the most 'off' coil / detector combination was tuned or calibrated so that the GB with that specific coils was not to negative a GB.

Then the other coils could be used w/o falsing, but there was a trade-off. It meant that the coils on the other extreme might have a too positive GB and, depending upon how positive that was, it could have a negative impact of detection depth, target response quality, and even be so positive that the detector might not give a good response to some higher-conductivity targets, such as big silver dollars, and even silver or clad halves or quarters if too positive.

It sounds like, in your case, you have a Golden µMAX that as close to ideal GB settings for the 8" and 6" Concentric coils you're using and those would be the only coils I'd use on that model.

Monte

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

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Subject Author Views Posted

Tesoro goldan umax new tone vs old tone

farmerboy856 467 January 20, 2020 10:23AM

Re: Tesoro goldan umax new tone vs old tone

Harold,ILL. 261 April 02, 2020 08:45AM

Re: Tesoro goldan umax new tone vs old tone

Monte 279 April 03, 2020 05:03AM

Re: Tesoro goldan umax new tone vs old tone

Harold,ILL. 235 April 03, 2020 07:01AM

Yes, it can be the search coil iteslf.

Monte 250 April 03, 2020 07:17AM

Re: Tesoro goldan umax new tone vs old tone

Hihosilver 284 February 14, 2020 08:02PM

Good to read your reply, but I will comment here or there.

Monte 267 February 15, 2020 07:28AM

Tesoro's "multi-tone" models. There were some good ones.

Monte 446 January 21, 2020 03:41AM

Holy Mackerel !!!!

OregonGregg 418 January 20, 2020 02:01PM

Re: Holy Mackerel !!!!

farmerboy856 326 January 27, 2020 09:10PM

Tesoro Goldan µMax - tones

UtahRich 386 January 20, 2020 01:03PM



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