Author Archives: Industrial Coaxial Connectors

If you have come to this article is because you need a coaxial cable, but do not know the points to take into account to make the right choice of coaxial cable. The good news is that you have reached the right website.

Well, let’s start by pointing out that a coaxial cable has a pair of electrical wires; one is in the middle and the other is located in the insulating space between the two.

What is a coaxial cable used for and where?

This type of cable is used to transmit energy in radio frequency, thanks to the fact that it offers a very demanding control over the electrical impedance, as well as obtaining a great performance for high frequencies, shielding and control of electromagnetic interference.

Currently there is a wide range of applications for coaxial cables, but the truth is that its two main impedances are those that determine its use.

We refer to the 50 Ohm impedance used for data signal applications, and the 75 Ohm impedance used for video signal.

Recommendations for choosing the right coaxial cable

Recommendations for choosing the right coaxial cable

The best advice we can give you to choose the right coaxial cable is to know the following definitions:

Tenuation: When power is lost, the level is measured in dB of loss per cable length. Well, the attenuation increases with frequency.
Coaxial adapter: This is a device that is used to change one type of connector to another such as a TNC to SMA adapter, for example.
Double Axial: Consists of a branch of coaxial cables that has two central conductors and has a single dielectric and a braided shield.
Shielding: refers to a conductor made of metal wires that covers the central conductor and the dielectric.
Central conductor: the solid or braided wire in the middle of the coaxial cable.
Coaxial connector: interconnection device located at the end of the assembled coaxial cable. There are several types: SMA, TNC, type F, N
Dielectric: we are talking about the insulating material that separates the central conductor from the shielding conductor.
Frequency: is the number of times a periodic action occurs in a second. The frequency is measured in Hertz.
Electromagnetic Interference (EMI): refers to the electromagnetic energy that alters electrical signals.
Impedance: The property of a component to restrict the flow of current through a circuit. Impedance is measured in ohms (Ohm).
Jack: A female connector that commonly has a hole in the center, something that doesn’t happen when it’s a reverse polarity (RP) connector.
Insertion loss: This is a measure of the attenuation established after connecting a cable or equipment in the system.
Plug: male connector that usually includes a pin in the center, unless it is an RP connector.
Radio Frequency: Frequency band starting from 3 MHz to 3 AWG. It is generally used for Wi-Fi signal transmissions, telephony, TV and general data.
Bend Radius: the size of the radius where the cable can be bent without losing the signal.
Propagation speed: normally expressed as a percentage, it refers to the speed of transmission of electrical energy in some length of cable contrasted with the speed of light.
Voltage Standing Wave Radio: is the relationship between the maximum effective voltage and the minimum effective voltage. Both voltages are measured by means of the radio frequency transmission line.

how to choose the right coaxial cable

We assure you that by mastering these definitions you will know how to choose the right coaxial cable for you. If you have any questions, you can contact us.

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The connectors in the aeronautical industry are RF adapters. We will talk about them on this occasion.

What are RF adapters?

Coaxial RF adapters also known as Radio Frequency Modulator are units that adapt signals. In this case, they are used to connect the most modern video devices to devices that do not have compatible connectivity, either because they are too old or because they have been designed with another utility in mind and, therefore, do not have standard RCA connectors.

This converts both audio and video signals into RF signals, which can then be tuned into mono audio. The quality is poorer than with other connections, but no more is needed in the aircraft industry.

Alfa`R coaxial RF adapters, the most widely used connectors in the aeronautical industry

Alfa`R coaxial RF adapters, the most widely used connectors in the aeronautical industry

As indicated above, our coaxial RF adapters work by coupling connectors that are from different series. Today, this is not a problem. What is a major challenge, and some customers even think it is impossible, is to connect devices with different diameters, depending on the need in each case.

Our adapters are designed using simulation programs, in such a way that perfect calculations and checks are carried out that serve to modify each one of the details of the personalized prototypes that we create until arriving at the final result.

Our products for the aeronautical sector are designed in both 50 and 75 Omhios. In both cases they offer fabulous results in both stable frequency and VSWR.

They are realized with a design that makes that we always obtain a resistant and robust product. In addition, we attribute different IPs depending on the version we are manufacturing.

As we have always done, we design in a totally flexible way, offering features with multiple options, so that the number of versions of our coaxial RF adapters is very large. In this way, we are able to offer each customer exactly what they need, so that they do not have to worry or work too hard when making connections to their systems.

In general, the connectors in the aeronautical industry that we offer at Alfa `R are straight and aerial, although we offer panel and angled solutions. We do this on-demand, so that each user gets a unique, customized product, created specifically for their needs.

Needless to say, this is not the only variable aspect but we try to make the customer can be as demanding as they need and get a product specially designed for their project.

What are RF adapters?

And so far this is the end of the post for connectors in the aviation industry with their respective series of RF adapters. If you have found it useful and interesting you can share it with others who may be interested in the matter. Remember that we remain at your disposal for any doubt or question, you can contact us through our contact page or writing a comment in this article.

In our catalogue of coaxial RF adapters we have possibilities to couple male to male, female to female or male-female. You can take a look to see that we have dozens and dozens of variants that include different diameters, UHF series, SMB, TNC, SMA, SMC, N, BCN, MCX, FME, resistances, as we indicated, 50 or 75 Omhios, and so on.

Greetings and see you next post!

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The best option in connectors for lighting shows is the B-92 series we have at Alfa`R. This includes the circular series 419, 37Y, 337, T30, T40 which are used for connections of this type. Let’s go see them.

How is our B-92 series of connectors for show lighting?

This series includes, in all cases, robust yet flexible and lightweight parts, with life cycles exceeding half a million and an IP-68. Its features are so varied that we can form up to 60 different configurations. From this model, we make sure that any customer leaves with the right lighting connector, whatever the circumstances in which they have to work.

In addition, we must not forget that, as in any other sector, the lighting of shows also requires certain safety elements. That is why it is essential to talk about:

The insulators: We work with insulators with different turns, so that there are no connection errors when working on systems with multiple connectors.

Protective caps: As the name suggests, they are elements that seek to protect. They come in various shapes and, of course, in all sizes.

Choosing the right show lighting connectors

Let’s see how the choice of our B-92 series products is made.

Anti-vibration connectors: Once we have chosen the standard connector, we have the option to choose if we want it to be anti-vibration. Although it is not always necessary, there are times when severe vibration environments exist that make it necessary to choose this characteristic to obtain optimum results.

We’ll have to select the right size. This series has diameters of 10, 20, 30 and 40 mm.

The same goes for the number of pins, which ranges from 2 to 39.

We will determine what type of connector is needed, with the fitting predominating in our selection.
Aerial without fitting.
Overhead with fitting.
Airborne at an angle.
Base with fitting.
Base without fitting.

Either of the above types can be given, of course, in male or female.

You also need to make sure what the cable outlet will be like.
Metal cable glands. With nickel-plated brass body, polyamide insert, APDM seal, IP-68 protection and temperature resistance from -30 to 100ºC, and can be increased to 220ºC on request.
Metal cable glands with earth contact. Same characteristics.
Spiral plastic cable glands. Available in light grey, silver grey or black (with resistance to sunlight).
Cable glands for corrugated pipe. In light grey or black with UV resistance. It also includes IP 69 protection.
Multi-class plastic packing gland. In silver, light grey or black, it has a NBR/VITON seal, a slightly wider temperature range, withstands -40°C and an IP 54 degree of protection.

The contacts can be either soldered or crimped.

In addition, they can be used coaxially, electrically or in combination.

So much for the post of connectors for lighting shows: Circular series 419, 37Y, 337, T30, T40. We hope it has been very informative and please do not hesitate to contact us with any questions you may have.

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The 7/16 N series of RF connectors for the radio industry are designed to provide solutions for users who need useful, high-quality connectors.

How is our RF 7/16 N series of connectors in the radio industry?

Let’s see what are the main features of our 7/16 N RF connectors.

How is our RF 7/16 N series of connectors in the radio industry?

Electrical characteristics

Its impedance is 50 omhs
They have a usable frequency range of up to 8 GHz.
Its VSWR varies from frequency, test cable and connector, moving between 1.05 and 1.17 values.
The missing insertion is less than 0.1 dB at maximum frequency.
Its RF-leakage is greater than 125 dB.
The MIP is greater than 155 dBc.
The insulating and internal and external contact resistances are greater than 10 Gomhios and less than 0.4 and 1.5 momhs respectively.
They work with a voltage of 2700 Vrms that reaches peaks of 4000.
The maximum power, conditioned by frequency, ranges from 900 W to 5 KW.

Mechanical characteristics

Mechanically, we find ourselves with more than 500 cycles of use.
The torque applied to the fitting is between 15 and 25 Nm.
Our connectors have PTFE as an insulating material.
Inside, the contacts are CuZn39Pb3 and CuBe2 for male and female respectively.
The exterior is made of CuZn39Pb3.
Its sealing gaskets are made of silicone.
Finishes include external bodies with electric contact Ag 5µ and non-contact Ni 5µ.

Environmental characteristics

Connectors in the RF 7/16 radio industry from Alfa´R are useful in environments with temperatures ranging from -65 to 165 degrees Celsius.
Its climatic categories, depending on the model, are 55/155/21.
The thermal shock they possess is MIL-STD-202/107-B.
The moisture, corrosion and vibration resistance are MIL-STD-202/106-B, MIL-STD-202/101-B and MIL-STD-202/204-B respectively.

According to cable

Depending on the cable to which a connector has to be attached, we find them:

Semi-rigid cable: We have both male and female straight solder and panel cables.
Corrugated cable: These are straight male and female and also 90º male.
Flexible cable: In this case, the crimped plug is available in both straight and panel form and at 90°, as is the cable gland. For females, both crimped and glanded, the possibilities are panel and straight.

According to central contact

We can also make the following classification:

Weldable central contact: Males and females are made of panel and have a square plate.
Threaded center contact: Males and females have male M-3×5 and M-5×8 threads, but females also have female M-3×3.5 threads. In addition, we have a 90º female model (also with square plate) that includes female thread in M-3×6.


We cannot finish talking about the RF 7/16 N series without talking about our adapters.

Just as important as having good connectors is the possibility of using adapters in case of need.

We have them of three types according to their form:

Extension: They will be both male to male (plug) and female to female (jack) and female to female wall bushings.
T-shaped: They can be female-male-female, male-female-female-female-female-female-female-femal.

7/16 N series of RF connectors for the radio industry

And so far today’s post, we hope that this has been educational and has made you see and understand better how connectors work in the radio industry and their respective series RF 7/16 N, remember that for more information, questions or queries you can contact us. We also leave a link for you to take a look at our extensive catalog of connectors in the RF 7/16 N Series radio industry.

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As you know, at Alfa´R we have managed, thanks to a huge investment and a greater dose of value and effort, to be present in all sectors. We are fortunate to be able to say, with a big smile, that we offer products for totally different businesses and that, even so, we are national references and we have a strong presence outside the country. And of all the sectors in which we help our customers achieve their goals, today we focus on one in particular and talk to you about connection systems in the rail industry.

What are the connection systems like in the railway industry?

Clearly, this is a sector in which safety is paramount, above all else. There are many lives at stake every day and it is absolutely necessary that everything goes well and that the risks are, of course, minimal.

Thus, at Alfa´R we can only recommend products of the highest quality. Having said that, we can only move on to the different characteristics of the circular MC connectors, series B-92, which is suitable for making connections in the railway industry.


Circular MC connectors, B-92 series for connection systems in the rail industry

Let’s see, then, the characteristics of these connection elements.


It is important to know that we manufacture this type of connector in five sizes. These are the T-10, the T-20, the T-30, the T.40 and the T-70, the number being an approximation of the diameter of the insulator. Depending on this size we find a different configuration of pins, ranging from 2 to 39.


We find that, evidently, there are different types, as these are used in countless places and circumstances. We have aerials and base without fittings, aerials and base with fittings and aerials at an angle.


All of them can be male and female, with the exception of the angled aerial, which is found only as a male.


Cable output

According to the cable output, we have cable glands in metal and metal mass contact, whose characteristics are similar (body material, sealing material, insert), the degree of protection, the temperature range with which it can be worked… The plastic spiral cable gland is made of polyamide and has a smaller temperature range. Finally, we have the corrugated tube, a polyamide sealed in silicone.


The coating of the circular MC connectors, series B-92, is nickel-plated for the conductor body and painted or black anodized to prevent light reflection on the insulating body.

Angular displacement

With regard to the male connectors, the displacement code is given on the connection side and counterclockwise. For females the total opposite.

Other features

Some models are anti-vibration, designed to be placed in specific locations. These include the toothed fitting as well as a strap at the base.

We also find that the circular MC connectors, series B-92 are robust, flexible, with IP-68 degree of tightness, made of brass and with safety springs in the case of female contacts.

And that will be everything for today’s post where we talked about the connection systems in the rail industry and how Alfa’R’s industrial connectors play a crucial role in this sector.


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