Choosing coil

[wiimii]

My 705 GB at 35to38 what would be best for 6 inch coil. MF concentric or HF DD

 

[Idaho PRB]

I would say you could use either one with your GB #'s what they are. I like the DD coils better than the concentric's myself, but my ground is harsher than yours. My bet would be pick your most desired frequency and that would be your answer.
Just my .02 cents.
Idaho PRB

 

[Digger]

Even though I am partial to the lower frequencies, I'd recommend the 6-inch DD. Depth and sensitivity are similar between the two. But the DD has the concentric beat for target separation. JMHO HH Randy