Alright.
I haven't used all metal on Rutus hardly at all.
Rutus has the dual mode, White's V3i does as well, I think it is called mixed mode.
So all metal running in conjunction to disc channels.
What can it do for you?
A couple things.
First if you are running in disc only mode and sweeping around in a field where let's say targets (nonferrous and ferrous) are sparse.
If you sweep over a deeper nonferrous target, you likely will have to flush this deeper nonferrous target with your coil sweep, other wise you may hear no tone at all.
Ever notice how coil position sensivite a deeper coin is when sweeping?
So, if you engage AM to boot with disc, when you are sweeping your coil's periphery is more alive.
Meaning you have more leeway to locate a target.
Now when the AM channels sounds off,,sometimes depending on the target's depth and maybe conductivity and size, if you will start trying to find the actual targets with center of your coil,,,the disc channel will sound off and give you tone and ID.
Now, you can run like this above, and the AM may sound off , but with better coil position, the disc channel Amy never sound off.
This could indicate a real small target, a target where the freq and conductivity of target are a mismatch, or a deeper target.
You will in these predicaments have to make a decision to dig or not.
I encourage you to bury some deep nails and deep coins.
And Listen to them using AM.
The key is to continue to rotate around target and listen to the way the AM reports.
Try a 16 penny nail.
You will notice a difference as to the round signature in reporting with a coin vs a nail.
It takes a good trained ear.
Now, I won't BS you here.
Even with a good trained ear, can you still dig deep iron or nails?
Yep.
A scenario where this here may be of help.
Let's say you have discovered some deeper Civil war bullets in a field.
And after hunting with disc mode, you can turn on dual mode or just AM by itself.
You may be able to detect some of the deeper out of range in disc mode bullets.
Can be applied to coins too.
A site with loads of iron, maybe not the best place to use or try.
But hey, if a site has produced nicely a person can give it a go.
Most all detectors have a sensivity adjustment for the AM channel when us using mixed or dual mode.
Be mindful, this level of sensitivity here will be a driver of your detectors depth capabilities AM wise.
Forgot to say, this info may be helpful too.
It is very possible when detecting using disc channel only, to sweep a deeper target on the coil' periphery and the op will get an iron tone, hence walk.
All relic hunters especially should keep this in the back of their heads.
Some times even a deeper target when swept out of ideal coil,position will give a so so tone- meaning not ideally a nonferrous tone, but not a hard iron tone either.
I witnessed this when finding deeper targets using F75 DST unit uaing disc channel only.
Yes it will cause a lot or resweeps but deeper targets usually take more work, comes with the territory,