radiomuseum.org: OC44 Citat: "...PNP germanium alloy transistor intended as oscillator and mixer in AM broadcast receivers. Ft=15MHz. All-glass body. Red dot indicates collector...", backup
radiomuseum.org: OC45 Citat: "...PNP germanium alloy transistor intended as IF amplifier in AM broadcast receivers. Ft < 5MHz. All-glass body. Red dot indicates collector. Made by Philips group manufacturers...", backup
Andrew Wylie, wylie.org.uk: Vintage Mullard Semiconductors Citat "...Philips had three overseas subsidiaries that manufactured semiconductor devices: Mullard Ltd. in England. Valvo Gmbh. in Germany. La Radiotechnique in France...The first radio frequency transistors produced by the Philips Group, and amongst the first in the world, were the OC45 and the OC44 both announced by Philips in October 1956...", backup
radiomuseum.org: OC44 Citat: "...PNP germanium alloy transistor intended as oscillator and mixer in AM broadcast receivers. Ft=15MHz. All-glass body. Red dot indicates collector...", backup
radiomuseum.org: OC45 Citat: "...PNP germanium alloy transistor intended as IF amplifier in AM broadcast receivers. Ft < 5MHz. All-glass body. Red dot indicates collector. Made by Philips group manufacturers...", backup
Andrew Wylie, wylie.org.uk: Vintage Mullard Semiconductors Citat "...Philips had three overseas subsidiaries that manufactured semiconductor devices: Mullard Ltd. in England. Valvo Gmbh. in Germany. La Radiotechnique in France...The first radio frequency transistors produced by the Philips Group, and amongst the first in the world, were the OC45 and the OC44 both announced by Philips in October 1956...", backup
