Part Number: 067-0681-01 (Tunnel diode)Part Number: 1N4398 (Tunnel diode)Part Number: MP1105 (Tunnel diode)Part Number: MP1603 (Tunnel diode)Part Number: PD6009A (Tunnel diode)Part Number: PD6013A (Tunnel diode)Part Number: PD6020 (Tunnel diode)Part Number: PD6020A (Tunnel diode)