multifrequency vs single frequency for coins/silver only

[Donna(NJ]

I forgot to mention that the lower the frequency, the better the ground penetration.

Been diggin lots of wheaties as of late. I believe because of corrosion, the signal bounces a lot. Recently found a crusty silver quarter.
Thought it was a zinc because of the the low numbers. Was quite shocked and happy to see the silver.
Im going to give the 5 khz a try to see if I can scrounge up some more silver.

HH
Donna(NJ)

 

[Jason in Enid]

Corrosion absolutely plays a major role in the target VDI. You have to remember that the metal target is an antenna. The search coil pumps energy into the ground to energize any conductors present, then stops and listens for one of those "antennas" to radiate that energy back out. Corrosion blocks and alters that energy charging / broadcast cycle so you arent going to get the same return as from a fresh, shiny coin.

 

[John in Nawth Carolina]

Been diggin lots of wheaties as of late. I believe because of corrosion, the signal bounces a lot. Recently found a crusty silver quarter.
Thought it was a zinc because of the the low numbers. Was quite shocked and happy to see the silver.
Im going to give the 5 khz a try to see if I can scrounge up some more silver.

HH
Donna(NJ)View attachment 164View attachment 164View attachment 164

Very nice. I would love to experiment with different frequencies at an old site.

 

[Mark kus]

I've tried it here where I live in Ct multi is king for me I've tried every possible way I can detect with the Nox to..
Mark

 

[dirthunter308]

This has been a very good post!! Lot of information.

 

[xwyokid]

My old X-70 with the 3KHz coil was just a total coin killer.

 

[ColonelDan]

There are numerous factors in determining if and how deep any detector can "see" a target....type of soil, mineraization and moisture level, orientation of the target in the soil, amount of corrosion and EMI just to name a few. Settings that work miracles in one area may not be effective in another due to these other variables. Settings I use here on Florida beaches won't work all that well on Hawaii beaches.
While it's true that lower freqs are better for higher conductors, the fact that in this case, 5 kHz "saw" the target when multi didn't doesn't necessarily mean 5 is always better than multi in all or other cases. This is why I always "dial in" my EQX 800 to suit the particular environment as best I can. The environment/situation plays a major role in detector performance.
Just the view from my foxhole...

 

[Big Treble]

Not sure if its the case with the Equinox, but I have a v3i which can switch between muliple frequency and single frequency. And single frequency is know to be deeper. The only real two things that can change the ability of the detector to go deeper is the size of the coil(field) and the power of the transmitted signal. More of the power of the detector can be harnessed to push a single frequency rather than trying to push multiple frequencies through the same ground.