Adapters
The APC-7 connector required adapters to change from the connectors used in the laboratory to those used on everyday products. These adapters are expensive precision devices. For example, an APC-7 to type N (f) cost $105 in 1979. Such adapters bought new today (as of July 2012) can cost as much as $294.
Read more about this topic: APC-7 Connector