Hi guys,
I've done a bit of testing on the DD Spiral coil, and had my first swing session with it on friday.
I first did a range of tests on a selection of nuggets, comparing timings in Mono and DoubleD modes to get a feel for the coils capability.
All-round for depth and sensitivity, the best combo was Double D and Sens Extra. DD/Normal was better on a 28 grammer. Mono / Fine Gold had a slight edge over Sens Extra/DD on bits under half a gram, so this would be best utilised in hot ground. Mono/Fine Gold also fared better on a 1.8 g porous bit (found with a GPZ), but wasn't as deep on a 5g specie in ironstone. I later tried this combo on a couple of hot clay runs and it purred like a kitten.
I went for a detect in some hot variable ground, and played around with various settings. Got it to run very nicely on Double D, Sens Extra, Tracking (slow), Rx Gain 11 , Stabilizer 11, Slow Motion. It was nice being able to try different Coil/Rx and timing combos again. Running in Sens Extra, DD and Slow Track, with Slow motion sort of made it feel a little like the GPZ with it's big Super D coil.
EMI handling was somewhere between what you'd get with an 11" DD (very stable) to a mid-size mono. Double-D coils have always been good at this, and with the bad emi activity we've been having lately in the Adelaide Hills it was good to be able to cut some of it out.
Won't get out again till later this week, so I'll report more when I get more time on it.
Other general things to note:
1. All coils use litz wire
2. They are fully waterproof
3. the skidplates fit very snug, no need for coil tape, so you can clean them out regularly
4. The coils are white, so you won't have any heat related issues
5. No touch sensitivity/falsing
After spending a bit of time with a selection of Detech coils in SA and Vic (thanks StinkyPete for the opportunity), I think they bring something new to the market,
and represent good value for money, and as a result I have put my hand up to be an agent for Detech here in S.A.
So if you're interested in buying one, you can go through StinkyPete in Vic, or me here in Adelaide.