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Gain and Sensitivity
Posted by: Miser67
Date: August 13, 2018 02:13PM
I am looking for metal detectors that allow me to independently adjust the GAIN and SENSITIVITY controls on the detector. I thought Gain and Threshold were the same, but I was wrong.

I presently know of two that allow me to that: White's V3i and the older Fisher 5. I know there must be more. Can someone help me kick my brain into gear?



As always, any post I make here is solely my opinion based on my own experience and knowledge. Feel free to disagree.



Edited 1 time(s). Last edit at 08/13/2018 02:14PM by Miser67.

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Re: Gain and Sensitivity
Posted by: Sven
Date: August 13, 2018 05:02PM
DeepTech Warrior



Nokta/Makro Anfibio-Multi, Makro Multi-Kruzer, and few others
Self built Mirage Pi's --- they work great in trashy areas!!




Re: Gain and Sensitivity
Posted by: Tom_in_CA
Date: August 13, 2018 05:54PM
xlt, spectrum, & eagle all had those as 2 separate controls.

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Re: Gain and Sensitivity
Posted by: Tom Slick
Date: August 13, 2018 09:42PM
Almost all current offerings by most all manufactures use gain and/or sensitivity interchangeably. There were a few older White's detectors that had both but other than the Vista mentioned above, there are very few with both.



Arizona
43 years detecting, ex White's dealer.
Current Detectors:
Makro Multi Kruzer
Makro Racer 2
White's DFX x 3
Minelab Equinox 800

Re: Gain and Sensitivity
Posted by: RG-DeepTech
Date: August 14, 2018 03:05AM
The newest Vista GOLD GAIN too:




Re: Gain and Sensitivity
Posted by: IDXMonster
Date: August 17, 2018 05:40PM
:lol: Whaaaat? Maybe someone should go over the definition of these controls first....

Re: Gain and Sensitivity - definitions
Posted by: Tom_in_CA
Date: August 17, 2018 06:00PM
Quote
IDXMonster
:lol: Whaaaat? Maybe someone should go over the definition of these controls first....

Although they would *seem* to be one-&-the-same, yet it is my understanding that this is the difference : Sensitivity is what controls how much strength you're putting into the "send" signal. Gain is what controls how much "receive" signal you are choosing to receive back from the ground.

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Re: Gain and Sensitivity
Posted by: Tom Slick
Date: August 17, 2018 07:53PM
Tom, I always thought it was the other way around. Gain being sent, Sensitivity, how sensitive it is to the returning signal. Don't get me started on White's Signal Balance.



Arizona
43 years detecting, ex White's dealer.
Current Detectors:
Makro Multi Kruzer
Makro Racer 2
White's DFX x 3
Minelab Equinox 800

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Re: Gain and Sensitivity
Posted by: mrwilburino
Date: August 18, 2018 03:45AM
I was under the impression that the transmit output was fixed (non-adjustable) on most machines, and that sensitivity determined what the detector would report on based (as Tom S. said) on the strength of the return signal.

Gain is an amplification of the weaker signals?

I've always been a little fuzzy on sensitivity vs gain vs threshold.



Fisher Teknetics XP Minelab

Re: Gain and Sensitivity
Posted by: Tom_in_CA
Date: August 18, 2018 11:26AM
Ahh, Yes, I'm thinking of Whites "signal balance". And was equating that to the "gain". Ok, I confess, I dunno what the heck I"m talking about, haha

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