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The 4" Concentric coil does NOT get 'good depth.'

February 06, 2019 07:08AM avatar
Quote
jmaryt
happy to know the 4" is getting good depth monte! in your experience, better than the coil's width in air?
It is a nice and thin and lightweight 4" Concentric type coil, but to do an 'air test' here in my home with a lot of EMI (every detector I own or try is very noisy and unstabile) can only give me a rough idea of the detector / coil potential. Sitting here in my den, in front of my computer, LED desk lamp on, overhead light on and other in-house annoyances, I turned the F44 on using my full '20' Sensitivity setting, stood it on the arm cup und and used a Zinc 1¢ and common 5¢ coin to get a rough idea from an 'air test.'

I Do NOT consider the results from this 4" Concentric coil to be 'good.'

With a slow and 'proper' sweep speed holding the coins flat-to-the-coil and getting solid hits at 6"-6½" and 'iffy' hits at 7", I would consider that 'much better than just good' for a 4" coil.smiling bouncing smiley


Quote
jmaryt
.."proof of the pudding" is coming up with your field testing. will wait for that...good report!
Yes, that will be the real test of a smaller-size coil on both a discontinued Omega 8000 (available for a reasonable pricethumbs up) or a new F44 ('brand new' at a very reasonable pricethumbs upthumbs up) which make very 'fun-to-use' urban Coin Hunting units. If I can find a wind-sheltered location or two I might eeek out a few minutes today after my morning VA clinic appointment. However, it's 30° now with a 16 mph wind for a wind chill of 19°, and while it's supposed to be mostly sunny, the high later today might hit 36° but the winds are supposed to be in the 10-18 mph range all day.

Tomorrow is the same before snow arrives for a few days on Friday, but Thursday's wind drops to around 5 mph making it better .... but coming off a 17° low so the ground might be too tough for target recovery. I might check with my niece in neighboring Idaho and see if the old barn on their property is accessible where there might be a few 'keepers' left inside the old barn that dates to about the '30s or '40s ... plus that might shelter me from the wind and most of the ground hasn't been wet to freeze.

Anyway, when I have the chance to work the 4" at several different site challenges I'll report back. The 'depth' will be an interesting factor, although I bought the 4" Concentric coils for working in tighter, confined spaces and really dense debris and not necessarily for 'depth.'

Monte

"Your EYES ... the only 100% accurate form of Discrimination!"

Stinkwater Wells Trading Post
Metal Detector Evaluations and Product Reviews
monte@ahrps.org ... or ... monte@stinkwaterwells.com
503-481-8147
Fisher:(2), Nokta-Makro:(4), Teknetics:(2), Tesoro:(2)
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Subject Author Views Posted

f44

jmaryt 57 January 30, 2019 09:06PM

My thoughts on the Fisher F44 and search coils.

Monte 62 January 31, 2019 10:11AM

Re: My thoughts on the Fisher F44 and search coils.

jmaryt 35 February 01, 2019 11:59PM

Re: My thoughts on the Fisher F44 and search coils.

Jamie 40 January 31, 2019 06:13PM

I'm anxious to findout how the 4" Concentric and 5" DD coils compare.

Monte 43 February 01, 2019 07:53AM

Re: I'm anxious to findout how the 4" Concentric and 5" DD coils compare.

jmaryt 41 February 02, 2019 12:09AM

Search coil assignments based on site selection and detector behavior.

Monte 39 February 02, 2019 07:54AM

Re: Search coil assignments based on site selection and detector behavior.

RickUK 28 February 04, 2019 01:13PM

Yes, smaller-size coils can rule the day, and I just added my smallest-size coil yesterday.

Monte 46 February 05, 2019 08:37AM

Re: Yes, smaller-size coils can rule the day, and I just added my smallest-size coil yesterday.

jmaryt 37 February 05, 2019 04:18PM

The 4" Concentric coil does NOT get 'good depth.'

Monte 31 February 06, 2019 07:08AM

Re: The 4" Concentric coil does NOT get 'good depth.'

jmaryt 26 February 06, 2019 11:36PM

Re: The 4" Concentric coil does NOT get 'good depth.'

Jamie 29 February 06, 2019 08:15AM

Re: Search coil assignments based on site selection and detector behavior.

jmaryt 38 February 02, 2019 04:42PM



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