Hi Guys; We are in need of the following diodes or at least a commercial number and a place to buy them: 1 each 1N3848 tunnel diode. 2 each 152-138 point contact diode or sub. I applied twice to join the Tektronix group but have not heard back. Thank you. 73, Ed Richards K6UUZ Simi Valley, Ca 93065 Home of the Air Force 1 pavilion