PK Porthcurno is a museum located in the small coastal village of Porthcurno Cornwall, UK. Porthcurno was the point at which many submarine telegraph cables—transatlantic and to other locations—came ashore. The first cables were direct current impulse transmitters. The first cables with transistor amplifiers were laid in the 1950s. The museum, which opened in May 1998, is housed in the former telegraph facility.