Developed during the heyday of the telegraph, the Lineman’s splice is designed for connections that will be under tension. It is commonly claimed that, properly made, a Lineman’s splice is stronger than the wires of which it is composed. In any case, it is a time-proven method, and, coolest of all, one of NASA’s Required Workmanship Standards. To wit, in a NASA-approved Lineman’s splice:
- The conductors shall be pre-tinned.
- There shall be at least 3 turns around each conductor and the wraps shall be tight with no gaps between adjacent turns.
- The wraps shall not overlap and the ends of the wrap shall be trimmed flush prior to soldering to prevent protruding ends.
- Conductors shall not overlap the insulation of the other wire.
Though the Lineman’s splice was originally used without solder, today soldering is common. And NASA insists on it:
- Solder shall wet all elements of the connection.
- The solder shall fillet between connection elements over the complete periphery
of the connection.
This material comes from page 84 of NASA-STD 8739.4 (PDF), which is a great reference if you’re interested in best practices for interconnecting cables and wires.
MTR-4B V2 Photos COMING SOON “The Mountain Topper” The LnR Precision MTR transceivers are designed to be efficient portable CW rigs. Whether climbing... Read more
NanoVNA SAA2 Version 2 Vector Network Analyzer – Ham Radio Antenna Analyzer Read more
A derecho with winds of 80 to 100 MPH struck eastern Iowa last August, disrupting power and telecommunications for some 400,000 residents. But, as... Read more
The winning article for the January 2021 QST Cover Plaque award is “CW-ELMER – An Advanced Morse Code Learning System,” by David A... Read more
Contest University (CTU) is holding a Virtual Propagation Summit on Saturday, January 23. The Zoom-platform event will get under way with introductory... Read more
144 MHz signal from the Faroe Islands heard 3000kms away in Bulgaria during Geminid Meteor Shower – Dec 2020
Every year, the Geminid meteor shower peaks around the 14th of December and many VHF radio amateurs make contacts by bouncing signals off the meteor t... Read more
The QYT KT-780 Plus is a 100 watt mobile radio on the 2 meter Amateur Radio Band, and works on FM mode. Today we will walk through the menu of the rad... Read more
Hot on the heels of the last post about the 5400km TEP opening on 144 MHz between Argentina and the island of Aruba, we have details of some more cont... Read more
Testing My Mini 64:1 Half-Wave End-Fed Antenna Transformer. Read more
This is the third in a series of videos following my efforts to track down a source of local QRM / Radio Interference. Following the build of a succes... Read more
“We are bringing in 2021 with Tuesdays with Tim, K3LR and Jeff,KB8ZWT discussing HF antennas. Did you recently upgrade from tech to general? Tha... Read more