Coil mounting screw on Tesoro Bandido ll uMax

[ToddB64]

The coil mounting screw on my previously-owned Bandido ll uMax is made of metal. Does anyone know if the screw was metal or plastic on new production units ? Seems like it should be a non-conductive material to avoid interference.

Todd

 

[dirthound]

mine is metal also but on my diablo umax and on my tejon it is plastic.

 

[ToddB64]

dirthound........Then it looks like the factory intended to use a metal screw. However, I would still like opinions on whether or not it would be advantageous to replace the metal screw, washer and nut (the nut is plastic, but has a brass threaded insert.) with all plastic or nylon parts, to avoid any possibility of electrical interference. Perhaps I am being overly cautious about the screw being metal. I understand the original lower pole section on the Tesoro Bandido ll uMax was metal, but many others use non-metallic lower poles, like my Garrett Ace 250 and White's Classic ll. When I bought my Bandido ll uMax from the previous owner, he offered to replace the original metal lower pole with a non-metal one, to which I agreed.

Any further opinions/facts will be appreciated.

Todd

 

[BarberBill]

I have a mix of both on 6 different detectors and can't tell any noticable difference. The nylon/plastic whatever they are are a size bigger than the metal ones. I've found replacement nyon screws and wing nuts in either size at the local hardware stores that work. Pretty much all the manufacturers are using them now so they may offer a slight advantage, but I haven't noticed it and still use the metal ones where they are already in use.
HH
BB

 

[ToddB64]

I have a mix of both on 6 different detectors and can't tell any noticable difference. The nylon/plastic whatever they are are a size bigger than the metal ones. I've found replacement nyon screws and wing nuts in either size at the local hardware stores that work. Pretty much all the manufacturers are using them now so they may offer a slight advantage, but I haven't noticed it and still use the metal ones where they are already in use.
HH
BB

Thanks again for the feedback Bill.

Maybe the metal mounting screw assemblies are made of a very low conductivity alloy, so don't create any noticeable interference with radio waves.

Another thought, I would imagine that radio waves are somewhat omnidirectional, undulating or swirling out over the lower end of the lower pole section, including the coil mounting screw assembly. Otherwise, why would manufacturers be going to nylon-based plastics on the lower pole sections ?

Maybe Monte will have something to add.....I hope. "Paging Monte ! "

Todd

 

[Monte]

metal bolt and nut because they are stationery in the field. They are not in motion across a static coil or visa-versa.

Can they cause some level of interference? Yes, but generally it's not as noticeable until you get to a higher frequency, higher gain model. Most of the metal bolts used were stainless steel and therefore less annoying than an iron bolt might be.

Some of the nylon and plastic bolts that have been used don't tighten up as snuggly as the metal hardware, which is one reason some manufacturers went to a larger bolt home and larger non-metal bolts for rigid, durable performance.

On the Tesoro models I've used over the past twenty7-seven plus years I never had an issue with a unit using a metal bolt & not. It's more psychological than anything else with most Tesoro's, but I keep both metal and non-metal hardware in my detecting kit.

Monte

 

[rmptr]

My experience is same as Monte's.
Both metal and nylon currently in use.
And nylon slips easier... use a washer between coil and stem made from rubber inner tube to give it some grip.
rmptr

 

[ToddB64]

dirthound, BarberBill, Monte, rmptr......Thanks for your feedbacks on the subject. You eased my concerns about the metal hardware, so think I'll just stay with whatever type was supplied by each manufacturer.

Todd