simply put, what is it?
How it's set affect detection depth? And how?
My best understanding in reference to MD is that the lower the gain is set, the bigger the discrepancy in volume between weak (i.e. deep) signals and strong (i.e. shallow) signals. With the gain set high all signals will report back at relatively the same volume. With the gain set lower, weak signals will report back at a lower volume that strong signals.
That's my understanding, in any case. Anyone with better info is free to correct me!
. Part of the success of the Compadre is due to the fact that it doesn't have the high-gain, low-noise circuitry. How would this affect a detector's response to say, gold chains?
Actually it does or it would not pick up anything. However it's response to gold is more of a function of the frequency of the machine.
Jerry
Then why does the Compadre pick up a fine gold chain while discriminating a paper clip but the Silver umax won't do it in it's a/m mode?
I will add to my original comment: actually I got it from Monte and am not saying he knows everything but it proved true in my tests. The Compadre, which doe NOT have high-gain, low-noise circuitry, is able to find a gold chain, whereas the new high-gain, low-noise Tesoros cannot. This seems to be the case, as my Silver umax SLAMS on a coin whereas the Compadre just gives a good strong sound.If it is in all metal mode, either should pick up both. If not then I would suspect the way it is ground balanced for one.
Added comment: The Silver umax has an operating frequency of 10.6 Khz and the Compadre is 12 Khz. Not all that far apart. But for my original point, the Lobo, which is advertised as a Gold machine operates at 17.5 Khz.
Yeah, we're beating this thing to death, and the original poster's question has been answered. For what it's worth, the Silver behaved the same way with the 5.75" coil. The Compadre is just a different animal and I was trying to figure out if maybe the low-noise components made the fine chain harder to detect, as I COULD rub the chain on the coil and pick it up.The detector does not see the entire chain en mass, it sees individual links. A small target.
The larger the coil for any detector, deeper it will go but will be less responsive on smaller target than a small coil. You did not say if your detectors are using similar coils or not.
Also the higher frequency is more suited for small bits of gold which is why you see the gold machines operating at higher frequencies than coin machines.
All of the detectors I have that operate at 14 - 15 Khz are better at detecting gold, large or small than the one's that run at 5 and 6 khz. Some of the them are old true non motion VLF and some are new micro-processor controlled and they all seem to behave in this manner, including one that I built
I could go on but this is already starting to get long and it is getting late
Jerry
Gain is a figure of merit for an amplifier circuit. With context to metal detectors, it is probably referring to the sensitivity setting. Sort of like turning the volume on your radio up or down.
Jerry
You will have to yell louder.
Jerry hasn't been on this forum since the middle of October 2012.