EMI at its worst

[Mark-VA]

Spent well over an hour yesterday evening trying to quieten down the machine with absolutely no success.
Went through each frequency, sensitivity 5, GB.
Adjusted threshold and nothing helped.
SB through the entire range of options, could never get a quiet setting, nothing helped.
Turned on Black sand, no help there.
Screen displayed random numbers, EMI at the worse of any machine I've ever had.
Adjusted the GB up and down, no good.
Now I could reduce the sensitivity to 2 and this helped but the machine couldn't not detect a 4" dime in the ground. No joys here.
Increased the sens back to 5 and could only randomly get an audio on the 4" dime.
This is my 3rd trip to this site in and attempt to hunt. Most successful was the TDI SL with the 7 1/2" coil and to think I had contemplated selling the TDI to get a Tarsacci. Man, glad that didn't happen.
This is the area I've always talked about, being the bad, coke waste school.
Big difference between silent and auditable EMI. EMI completely shuts down this machine.


Only remedy was to move 50 yards away. Leaves a lot of questions.

[Orbit]

[Orbit]

The TDI-SL is one of my favorite detectors.. I'm glad you didn't sell it

[nickel_n]

Spent well over an hour yesterday evening trying to quieten down the machine with absolutely no success.
This is the area I've always talked about, being the bad, coke waste school.
Big difference between silent and auditable EMI. EMI completely shuts down this machine.
Only remedy was to move 50 yards away. Leaves a lot of questions.

what machine was that?

[Mark-VA]

Sorry, forgot to mention, it's the Tarsacci.

[Mark-VA]

Revisited the site this afternoon. Took the Tarsacci with both coils. The 12" coil is much worse, had both types of EMI. With the stock coil I had silent, random ID numbers flashing continually. With the 12" coil I had both random ID numbers and audio tones. Experimented again but this time I combined more than one settings. Finally settled down enough to actually detect the 4" dime. Threshold -4, sensitivity 5.
Also took the Equinox 800, as a second test. Awful interference.
Went through all the programs and did a noise cancel. No joy.
Went through each frequency and noise cancel. No joy.
Went back to Beach 2 program because it is suppose to be reduced transmit power for salt water hunting. No joy.
Switched back to the best program I could find and reduced the sensitivity to 15, a lot quieter but could only get an iron audio on the 4" dime.
PP on the Equinox could find the dime no problem.
Never actually tried the prospecting mode, just to much added noise.
Well anyway, I gained back some of the painful confidence I had in the Tarsacci.
Wondering if there was a leaking transformer on one of the power poles. Just thinking.

[ivconic]

With several Chinese-made LED bulbs installed around the room; you will have perfect test conditions for the worst possible EMI scenario.
If you choose all the different bulbs, from different Chinese manufacturers; the EMI horror gets bigger!
There is about 80cm distance from the desktop pc to the wifi router on my other desk.
When the led bulb is off; the internet works well and the average for dload is 20 Mbit.
When I turn on the light bulb; bw drops to barely 2-3 Mbit!!!
I have SDR# and dongle. I'm getting ready one day to put a coil instead of an antenna and see what happens on a wider spectrum.
But I've been putting it off for months... because it's obvious what I'm going to see on the spectrum.


In such conditions Deus behaves like a German machine gun from World War II!