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RDAs’ Common Structure Features Analysis

Source:OriginalAuthor: Rita 97Like Issue Date:2016-07-14 18:45 Sort:Atomizers 󰀢Comments:0


[Guide] For many newcomers, RDAs all look similar and are nothing more than a base and a tank. However, RDAs’ bases could also be classified into different categories according to their structures. For example, there are dual-electrode bases, three-electrode bases and four-electrode bases. The popular U shape dual-electrode and four-hole structure is widely applied to new RDAs and RDTAs.

Then how and why do these structures differentiate? Here I will present some common structures of RDA’s bases. Hope that you could find your answer in this passage.

1. The Classification of RDA Base’s Structures


According to the difference of electrode’s quantity, RDAs could be generally classified into dual-electrode RDAs, three-electrode RDAs and four-electrode RDAs. 

Dual-electrode RDAs have two electrodes on the base, one being positive and the other negative. Three-electrode RDAs have three electrodes, with two negative electrodes and one positive electrode.

The four-electrode RDAs are special in that they are actually with three electrodes and four holes, and the extra hole in on the positive electrode.

Besides these common ones, other structures like the five-electrode structure and the six-electrode structure also exist, which are suitable for building more coils. Moreover, some basic transformations could be made on these bases. For instance, the dual-electrode and dual-hole structure could be transformed into dual-electrode and four-hole structure. 

2. The Dual-electrode Structure


A. Dual-electrode and dual-hole

The dual-electrode structure has two electrodes on the base, one being positive and the other negative, and there is a hole on each electrode.

This kind of structure is convenient for installing coils. There is no need adjusting the coil’s feet if you want to make relatively standard dual coils. 


Its shortcoming lies in that it has only two holes, which hinders the process of cutting coils. Direct installment without cutting will lead to deformation of the coils’ laterals. And the small quantity of holes is unsuitable for building multiple coils.  While fixing, two coil wrapped bars are needed to be simultaneously plugged into the coils to prevent form deformation. 


Skills: Because the two holes are paralleled in height, we need to wrap another 90-degree.

From the pictures above, we could see that the common 6-cycle coil’s feet is different from that of the coil with an extra 90-degree’s wrapping in the aspect of height. Therefore, we have to decide the cycles of the coil according to the hole’s height.


Look at this picture, we could easily see the difference when the electrode is matched with two coils that are processed differently. 


B. Dual-electrode and four-hole

The dual-electrode and four-hole structure is the evolved version of the dual-electrode and dual-hole structure. Each of the electrode has two holes, which has diminished the embarrassment of sharing one hole. While installing, we could do it gradually form one side to another side with only one coil wrapped bar. After one side of the coil is fixed, we could cut the abundant coil first before installing another side to avoid the possibility of mis-cutting.

To build two coils, we can connect through the upper left and lower right holes. And it’s also feasible sharing the same hole to build four coils. 

Like the dual-electrode and dual-hole structure, this structure also need us to adjust the shape of the coil’s feet, otherwise the coil’s two sides will deform.  


Between the two different processing modes that have been mentioned above, the one that will result in different heights of the two coil feet is more suitable for this structure. 


The dual-electrode structure is more appealing to newcomers, because it is much convenient for installing coils and making coil heads, especially the dual-electrode and four-hole structure, which could be freely installed with two coils. Besides, the electrodes are at the sides of the atomizer, therefore they leave enough space for the liquid tank. 

3. The Three-electrode Structure


The common three-electrode structure often has tree electrodes and three holes. Two negative electrodes are at the sides of the atomizer, and the positive electrode is at the center. 


This structure’s feature is that when building two coils, the positive electrode is shared. Four coils could also be installed, but the trouble of fixing and cutting comes when the center hole should obtain four coil feet. 


While building two holes, if you want the coils to be center-positioned, you need to adjust the shape of the coils’ feet, which is a little bit difficult for newcomers. Without the adjustment, you could also succeed by push the coils toward the center using tools, but this will lead to deformation or overlapping. 


The tree-electrode and tree-hole structure is the most common one among RDAs, but this kind of design makes it a little bit difficult to install coils. Moderate adjustment is also needed when making center-positioned coils, which is not so easy for newcomers. 

4. The Four-electrode Structure (three-electrode and four-hole)


The four-electrode structure is special. It is, strictly speaking, a kind of transformation of the three-electrode structure. The positive electrode at the center is transformed wider, with two holes on it, which looks like two electrodes standing closely. 


(The picture above displays the difference between making center-positioned coils for the three-electrode structure and the four-electrode structure. For the three-electrode structure, both the two coil feet should be adjusted, and for the four-electrode structure, only one side need to be adjusted.)


The four holes are paralleled, and by sharing two holes you could install four coils. This structure is suitable for installing multiple coils. 

Except that some RDAs’ positive electrode could not be fixed and will rotate along with the screw, the four-electrode structure do not have apparent drawbacks. It is playable and easy to operate. For newcomers, it’s almost the most convenient structure, being only next to the two-electrode and four-hole structure. 

Before the appearing of the two-electrode and four-hole structure, the four-electrode structure is my favorite. It’s very convenient to install coils. When making center-positioned coils, pay attention to keep distance between the positive electrode and the coil feet of the negative electrodes, otherwise short circuit may take place. 

5. Others


Besides the above common structures, there also exist other special structures. For example, the bf99 RDA, the Sector One AX1, the earlier Cloud Monster, Odyssey, etc. Once we are able to distinguish the positive and negative electrodes, we’ll find that they all have the same basic structure.


6. Summary

To conclude, among the different styles listed above, the most suitable one for newcomers is the dual-electrode and four-hole structure, because it is the easiest to operate. However, after all your favorite is the most suitable one. Not matter what kind of structure, once you are getting familiar with it, you’ll soon find the way to have fun playing with it. That’s where vape’s charm lies in. Hope you’ll benefit from this passage. 

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