Wire wrap
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Wire wrap is an electronic component assembly technique that was invented to wire telephone crossbar switches, and later adapted to construct electronic circuit boards. Electronic components mounted o
Close-up of wire-wrap connections
Typical wire wrap construction of Bell System telephone crossbar switch. Some types of connection were soldered.
Wire wrapped backplane of an IBM 1401 computer, introduced in 1959
A modern wire wrap in a CFL
Point-to-point construction
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In electronics, point-to-point construction is a non-automated technique for constructing circuits which was widely used before the use of printed circuit boards and automated assembly gradually becam
Wire wrap
…and the decreasing cost of professionally made PCBs have nearly eliminated this technology. Manually wrapped wires were common in early 20th century point-to-point electronic construction methods in which a strong connection was needed to hold the components in place. Wires were wrapped by hand around binding posts or spade lugs and then…
Underside of the chassis of a 1948 Motorola VT-71 7" television, showing the complexity of the point to point wiring.
Section of a typical Australian late 1930s radio, showing the point to point construction between components.
Point-to-point construction of military radio equipment
Point to point wiring on a homemade tube amplifier circuit.