As one of a dwindling number of people who still read paper
print versions of our electronics trade magazines, I find it more convenient to scan for noteworthy
new products and articles to report about on RF Cafe. I tear out pages and put them a stack for eventual
reference. The April 2016 issue of Microwaves & RF
had a feature on a new line of Raychem (TE Connectivity) heat-shrink
matched-impedance splices. I have used Raychem's heat-shrink splices for many decades
on standard signal and power wire in cases where it was more convenient that soldering the joint, cleaning
it, and then sliding a section of heat-shrink tubing over it. The only disadvantage of a Raychem type
splice is the cost and it is a little bulkier than the other way.
I cannot ever recall an instance where I spliced a coaxial cable rather than replace the entire length.
There have been times when the coax was laced into a harness assembly and replacing it was a real pain
in the posterior, especially since it was in the back of a row of equipment racks with no easy access.
Having had these new matched-impedance splices from Raychem would have been real nice.
It appears for now the splice kit is only available for
RG-393 coaxial cable, which
is a 50 Ω, 0.39-inch diameter cable rated to around 6 GHz. The advertised impedance match
tolerance is +10%/-3% (VSWR range of 1.03:1 to 1.10:1).
Per TE Connectivity's website:
"TE Connectivity Ltd. (TE) (NYSE: TEL), a world leader in connectivity
and sensors, announced its Raychem matched impedance splices for aerospace applications. Designed to
comply with MIL-PRF-32517 standard, the splices solve the problem of costly removal and replacement
of damaged coaxial cable by allowing fast, easy in situ repairs that maintain characteristic impedance
and other electrical properties of the system.
Coaxial cables are used extensively within aerospace and avionics systems, yet there has been no
effective solution to repair such cables damaged during operational use. Until now, any affected cables
within the airframe had to be disconnected, removed and then replaced, which was both time-consuming
'Our engineers have developed a solution that addresses this common challenge by matching the characteristic
impedance of the cable itself and offering the greater capability of in situ repair,' said Janeann Avants,
product manager, Global Aerospace, Defense & Marine, TE Connectivity. 'Our Raychem matched impedance
splices reduce the time and effort needed for repairs and lessen the number of cables that need to be
TE's new Raychem matched impedance splices are designed for the harsh environments of military and
commercial aerospace applications and are well suited for extreme temperatures, high vibration, high
EMI and corrosive environments. The splice contains three components: a hexagonal crimp barrel for the
center conductors, a dielectric shell that helps maintain cable geometry for impedance control, and
a heat-shrinkable SolderShield splice that both terminates the cable’s shield and provides sealing to
protect the splice environmentally."
Raychem Matched-Impedance Splices brochure here.
About TE Connectivity
"TE Connectivity (NYSE: TEL) is a $12 billion global technology leader. Our connectivity and sensor
solutions are essential in today’s increasingly connected world. We collaborate with engineers to transform
their concepts into creations – redefining what’s possible using intelligent, efficient and high-performing
TE products and solutions proven in harsh environments. Our 72,000 people, including over 7,000 engineers,
partner with customers in close to 150 countries across a wide range of industries. We believe EVERY
The inventions and products featured on these pages were chosen either for their uniqueness in the RF engineering realm, or are simply awesome
(or ridiculous) enough to warrant an appearance.
All Featured Product Archive Pages:
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3 | 4 | 5 |
6 | 7 | 8 |
9 | 10 | 11
| 12 | | 13 | 14
| 15 | 16 | 17
| 18 | 19 | 20
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Posted August 19, 2016