Escher.gif (426 bytes)

History of the Atlantic Cable & Undersea Communications
from the first submarine cable of 1850 to the worldwide fiber optic network

Splicing in a Repeater
by David Watson

To enable a repeater to be put into a copper conductor cable system a joint had to be made between the cable and the repeater.

Each cable and repeater had a length of 0.310" tail cable attached during manufacture.

0.310" joint made on the cable ship during loading

Once the cable and repeater had been loaded on to the cable ship and correctly positioned, the 0.310" cable tails were then joined together by means of a brazing machine and then a coating of polythene was moulded over the braze.

STC 0.310" moulding machine on the deck of CS John W Mackay

The tail cable was then coiled inside the repeater, the main cable was locked onto the repeater by means of a locking cap, (the round cone at the front ) and rubber buffers fitted. These buffers assisted the repeater during the laying operation whilst passing through the linear engine.

Jointing operation taking place on board ship during the SEA-ME-WE 1 project. The STC Southampton jointing team is in the final process of making the joint prior to closing the repeaters. The chap in the brown boiler suit is Ken Mann, the STC project engineer from Greenwich.

See also the Stamps page on repeaters and branching units

Images courtesy of and copyright © 2006 David Watson

Last revised: 5 February, 2021

Return to Atlantic Cable main page

Search all pages on the Atlantic Cable site:

Research Material Needed

The Atlantic Cable website is non-commercial, and its mission is to make available on line as much information as possible.

You can help - if you have cable material, old or new, please contact me. Cable samples, instruments, documents, brochures, souvenir books, photographs, family stories, all are valuable to researchers and historians.

If you have any cable-related items that you could photograph, copy, scan, loan, or sell, please email me: [email protected]

—Bill Burns, publisher and webmaster: