Advice on large coils

Prospecting Australia

Help Support Prospecting Australia:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Joined
Feb 9, 2015
Messages
1,382
Reaction score
3,993
Location
East Maitland
Hi I would like some advice / thoughts on the large coils. I am going to buy a new coil soon, not sure if I should get the 11 or the 13X11. How heavy? How well balanced? Any advice will be much appreciated. Thanks in advance. Cheers.
 
Hi Dave,
mate since the X35 has come out I have changed my opinion a lot. I used to talk people out of the 13 x 11 all the time. It was heavy and unbalanced.

But the X35 version of the 13 x 11 is a different story. major weight loss and the newer boards inside the X35 coils make it a stunner. It is still a fair bit heavier than the 9 Inch but your talking maybe 200 grams or so. The only adjustment I make is to narrow my swing a bit with the 13x11 on as the inertia of changing directions gets the elbow if I do the big wide swings that i do with the 9 Inch on.

Having said that It eats up ground and you have less gaps in your swing as with the bigger coil you tend to overlap naturally a lot better.

Knowing what you have in the kit I reckon the 13x11 as you have the small coil for the tight bush sites with loads of sticks. the 13x11 will compliment your kit and give you some more options.

Locally to you I ran the 13x11 on the newcastle main beach about 3 weeks ago. Nabbed a .4 gram 925 ring at about 3 inches. It was so thin and small but the signal was repeatable and easily heard through the chatter. I was working the waterline and the waves where submersing the coil. Really surprised at its performance on the wetsand in stock wetbeach mode ground balanced to 00.

Hope that helps a bit mate.

Give us a call if you have any questions

Clegy
 
I think the weights for the newer X35 13x11" are 590 grams with coil cover, and the older 13x11 at 662 with coil cover.

I can't compare between the newer coils due to weight and performance differences, though for me I found that I used the 11" and 9" coils much more often than the original 13x11". The 13x11" was purchased more for areas where iron/junk was at a minimum, for longer hunts the 11" and 9" are a lot less fatiguing with regards the weight, and are more well balanced on the shaft due to where the lower shaft is mounted on the coil.

The 11" coil despite being heavier than the 9" coil, doesn't really feel that much heavier in the real world. Swap over to the 13x11 and the weight is definitely much more noticeable.

I think many people have problems with the older coil due to having the lower shaft over extended and swinging it too far away from their body, sometimes that can't be helped, especially if you are a tall person. I am not the tallest person in the world, so I can get away with swinging the larger coil much closer to my feet, resulting in less fatigue. I am also not a big user of the arm cuff strap when using the smaller coils, though you will find it is a necessity running the larger coil due to being more nose heavy.

Just have to weigh up on what areas you are more likely to detect, if on older sites where iron is prevalent, there is no getting past the unmasking ability of physically smaller coils - same for junky areas around ovals/parks. For me that means the 11" coil has the best of both worlds - more coverage whilst still retaining good unmasking ability.

If you are detecting open paddocks, large parks with minimal junk, or at the beach, then the coverage of the 13x11" may prove to be of an advantage, especially if you like to grid to recover as many targets as possible.
 

Latest posts

Top