Can someone please help me locate this Diode it is used as a surge absorption Diode in the remote amplifier T/R switching circuit of a Kenwood TS-50S HF transceiver. I was using the T/R switching port to switch my MFJ-1026 Deluxe Noise Canceller.
It was working O. K. and I then turn the radio off. The next time I turned the radio back on it did not work. This was about two or three days later. The radio was physically disconnected from the antenna but between the time the radio was turned off then turned back on again there was a bad electrical storm. The T/R switching has went permanently shorted in the transmit mode. The radio is working OK I can transmit and receive ok. Any help locating this part would be greatly appreciated. Lou KE4UYP The Diode is a Sanyo-- Ultrahigh-Speed Switching Diode- LFB01 Silicon Planar Leadless Type Dimensions 1.4mm diameter 3.4mm long Specifications Absolute Maximum Ratings at Ta = 25°C Electrical Characteristics at Ta = 25°C Package Dimensions Features Highly reliable leadless glass sleeve structure. Very small size. Capable of being suface-mounted. Forward voltage : VF max=1.2V. Interterminal capacitance : C max=3pF. Reverse recovery time : trr max=4ns. Parameter Symbol Conditions LFB01 Peak Reverse Voltage VRM 90 V Reverse Voltage VR 80 V Peak Forward Current IFM ® 480 mA Average Rectified Current IO ® 150 mA Surge Curent IFSM ® 2 A Allowable Power Dissipation P ® 300 mW Junction Temperature Tj ® +175 Storage Temperature Tstg ® –65 to+ 175 °C Parameter Symbol Conditions Ratings Unit min typ max Forward Voltage VF IF=100mA 1.2 V Reverse Current IR1 VR=30V 0.1 µA IR2 At each VR 0.5 µA Interterminal Capacitance CVR=0V, f=1MHz 3 pF Reverse Recovery Time trr VR=6V, IF=10mA, RL=50W Max 4 ns _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
