Yes, they can have value. There are people that collect the actual machines that like to have them. And if they were produced by the US Post Office, they are cataloged.
No
The standard setup on almost all professional machines is two coils, but some can have three, and I've even seen a few pieces made that had six coils on one machine. It's important to note that the aforementioned machines were made more so as art pieces rather than fully operable machines. The main reason why most machines have two coils is due to the weight of the overall machine and the stress that is put on the operating hand of the artist throughout the duration of the tattoo. They are iron rod at their core and are wound in copper wire of varying layers, or wraps.
To stop them from becoming frail and splitting.
Anything wireless is based on the Tesla Coil.
well there is 8 wrap coils 10 12 15 wrap coils. 8 is what i use for lining 10 for shading 12 and fifteen would be for bigger mag needles
I've never heard anything to the effect, but I would assume that if the capacitor is placed too low, there would be more of a probability of the capacitor faulting due to improper placement. I personally don't build machines or coils though, so I'm not 100% on that.
Change coils.
Two coils two spark plugs are under the coils and the other two are next to the coils
No. Check the battery first. Then test for spark, fuel pressure, and test your coils.
What holds coils of what down to what?
Washing machines use electromagnets to operate the motor that drives the drum's rotation during washing and spinning cycles. When electricity passes through the coils of the electromagnet, it creates a magnetic field that interacts with other components in the machine to produce the desired motion for cleaning clothes effectively.
Pancake Coils are often used as evaporator and condenser coils in refrigeration systems.