Fork me on GitHub

Project Notes

#347 RF Connectors

Notes on miscellaneous RF connectors.

Build

Notes

All about Radio Frequency connectors and cables, typical applications:

  • between VCR and TV receiver (back in the day!)
  • into cable TV, satellite dish
  • cable modems
  • ham radio
  • test equipment

Typically use coaxial cable.

BNC Connectors

BNC - Bayonet Neill–Concelman.

See also:

bnc_connector

How to install a BNC connector on RG-58 coax

w2aew has a great video on crimping your own RG-58 connectors:

Build

A similar technique works for RG174, although with those I find extreme care is required not to destroy the inner pin (I’ve destroyed a few with just a little extra force when crimping)

Crimping Tools

I have an AN-02H1 crimping tool, which conveniently handles RG58 and RG174, among many others.

crimp_tool

F Connector

  • F Quick Connect - non-threaded, goes over thread
  • used RF splitter
  • RF adapter - F connect to RCA
  • F connector - wikipedia
  • F-Type connector series - Amphenol’s F-Type is a 75 Ω connector featuring 30 dB return loss at 1GHz.

f

SMA connector

SMA (SubMiniature version A) connectors are semi-precision coaxial RF connectors. SMA connectors can be visually confused with the standard household 75-ohm type F coax connector

sma

UHF Connector

uhf_connector

uhf

Coaxial Cable

  • Coaxial cable - wikipedia
  • RG-58/U - 50Ω Used for radiocommunication and amateur radio, thin Ethernet (10BASE2) and NIM electronics, Loss 1.056 dB/m @ 2.4 GHz. Common.[22]
  • RG-59/U - 75Ω Used to carry baseband video in closed-circuit television, previously used for cable television. In general, it has poor shielding but will carry an HQ HD signal or video over short distances
  • RG-174/U - 50Ω - Common for Wi-Fi pigtails: more flexible but higher loss than RG58; used with LEMO 00 connectors in NIM electronics.
  • RG-213/U - 50Ω - For radiocommunication and amateur radio, EMC test antenna cables. Typically lower loss than RG58. Common.[30]

Typical Crimp Die sizes

Cable Pin Ferrule
RG-59 0.068/1.72 .255/6.48
RG-174 0.068/1.72 .178/4.52

Credits and References

About LEAP#347 RadioConnectors
Project Source on GitHub Return to the LEAP Catalog

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is my personal collection of electronics projects, usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting (IMHO!).

The projects are usually inspired by things found wild on the net, or ideas from the sources such as:

Feel free to borrow liberally, and if you spot any issues do let me know. See the individual projects for credits where due. There are even now a few projects contributed by others - send your own over in a pull request if you would also like to add to this collection.