MTL Ulton Diplomat RTA

[Infinium]

The Diplomat, Ulton version, is a fairly well-known MTL atomizer in Italy.
It was gifted to me by the producer NK , or NK Coils, who, in addition to supplying wire and complex coils, also has a shop where they sell various interesting products, which I will link at the end of the text.
I came across NK wires by pure chance, as I imagine anyone who uses Aliexpress or Asian eshops has seen the NK Coils alluminion box or spool in the recommendations. I purchased my first spool of wire last January (2024) and was immediately impressed by the cleanliness of the wire, which is a very important factor. After introducing it to other Italian friends, they confirmed my impressions.

The Diplomat is inspired by a pipe of the same name, featuring 3 different bells that take the shape of 3 additional pipes. Despite this, it is still suitable for use with creamy and VCT liquids.
The Diplomat made by Ulton has a diameter of 23 mm and a height of 40.5 mm (without the drip tip), weighing 57.5 grams (also without the drip tip) and a capacity of 4 ml. Made of SS304L, the finish tends to be slightly more matte compared to other atomizers. The Ulton packaging includes the Diplomat, the 3 bells (one installed) from the first batch (Rhodesian, Hawkbill, Duke), a PSU tank section to replace the PC one, plenty of O-rings, two spare screws, and a U-tool to unscrew the bottom.

The drip tip is entirely made of steel, with a 4 mm wide hole. Its height, excluding the part that inserts into the atomizer, is 13.2 mm, while the diameter of the hole measures 4 mm. It is also possible to unscrew the base of the drip tip, which is held in place with threading. The 510 drip tip slot on the Diplomat Ulton is of standard size, so any drip tip, with thicker or thinner O-rings, fits without issues. The top cap, if it can be called that, does not unscrew, as the refill is exclusively from the bottom.

The tank of the Diplomat Ulton does not have threads for attachment to the bell section, but it is held in place by two O-rings. Instead, there is a threading to keep the steel and plastic parts together. By default, it comes assembled with the polycarbonate section, but it can be replaced with the PSU section included in the package.

The three bells included in the kit are always inspired by real pipe designs.

- Rhodesian (conical)
- Hawkbill (round)
- Duke (the flat one)

You can easily see that they vary in volume, and their weight ranges between 21 and 22 grams. The connection with the chimney is well-made, both in terms of execution (aesthetic) with no imperfections and because there is enough steel to prevent the bell from heating up easily. They are internally threaded, and once screwed onto the deck, they represent the only point of sealing between the two parts.

- Rhodesian (conical): internal width 14.5 mm
- Hawkbill (round): internal width 15.5 mm
- Duke (flat): internal width 15 mm

They vary significantly, even internally, to alter the perception of tobacco. As an atomizer, it was designed to vape a specific tobacco called Latakia, both solo and in mixtures (famous English mixturess or the so-called Balkan mixtures). However, as I mentioned earlier, it is also possible to vape VCT and creamy liquids without any issues.

The chimney diameter is 4 mm for all of them: it's truly a MTL atomizer.

The deck has a very good thickness, preventing overheating or transferring heat to the bell. Its seal is also supported by the O-ring present on the deck itself. The design is simple, with no liquid control and two permanently open rectangular air holes. During cottoning, be sure to cover both holes to ensure a constant and abundant liquid flow. To prevent flooding, the air hole, though not entirely clear, is sufficiently raised from the deck, "encased" by the positive post. The posts have horizontal notches relative to how the wire should be passed through, helping to keep it in place. The cross screws are well-made.

The airflow ring is removable from below. With the Diplomat installed on the box, there is half a millimeter of space between the bottom and the ring, allowing it to rotate freely without the risk of scratching the box. The airflow ring features a single hole, with options of: 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, and 2 mm. It also includes a stopper, which is very convenient for unscrewing the deck.

To unscrew the bottom, it is not necessary to unscrew the pin first. Simply insert the tool into the two holes to release the entire structure and, if needed, remove whatever is necessary.

That curious "nut" in the middle is the bottom with the two holes, and all that mechanism serves to stabilize and tighten the draw. In MTL vaping, silence and the right amount of resistance are very important factors when judging an MTL atomizer.

For a thorough cleaning, it's possible to unscrew the pin-airflow, which also allows you to replace it with aftermarket MTL versions. The PEEK insulator is well-fitted into the pin, and mine still seems reluctant to be removed, so rest assured it isn't loose. Removing the pin also takes out the positive post and its insulator, which requires attention. Reassembling everything is simple, as the deck has a recess where the post is easy to hold in place with your thumb or by flipping the deck onto a flat surface while screwing in the pin.

Being an MTL atomizer, for me the maximum usable wire is 27 gauge. A 26 gauge generates a really hot vapor. But I know that but I know that in the rest of the world is normal to use even complex coils. Despite the cultural differences, NK Coils offers both single wires, like the one in the picture, as well as many pre-made MTL complex coils or complex spools at an affordable price and excellent quality.

Aromatically, what changes with the three bells?

- Rhodesian (conical): the one that most highlights the tobacco, intensifying the top notes.
- Hawkbill (round): probably the most suitable for creamy liquids, VCT, flavored tobaccos in general, and even fruity ones. Very smooth vapor, tends to soften the flavor (in a good way).
- Duke (flat): the most balanced, with a fairly wide aromatic spectrum, capturing many of the ingredients and nuances of an e-liquid.

This is a bit of the world of those who vape tobaccos, but also of those who truly elevate MTL atomizers to the level of pipe or cigar smoking.
I also hope to have introduced a truly excellent wire manufacturer. When vaping tobaccos, which contain a high sugar content, I regenerate the coil once a day; with one coil, it is possible to vape 4 ml of extracts, and it can be cleaned once, but after 8 ml, it needs to be discarded. Over the years, I've gone through a lot of meters of wire, and NK Coils is one of the best I've tried.

You can find NK Coils products at various retailers, while for hardware lke the Diplomat Ulton (and wires), they also have their own e-shop with the option to purchase via PayPal: at the following link: https://nkcoils.com/

After some troubles with emails and permissions, I’d like to thank the Planet of the Vapes staff for helping me post my first review, and thank you all for reading.