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Picture of BNC - T - BNC connection
Picture of the BNC - T - BNC connection. The BNC on the left has been cut open to reveal a small red ring which will offer one more line of protection against water leaks in the cable jacket.


Wire and water test connection
To test the ability of our splice to block water, we used a T to connect our cable with a hose carrying water.


Complete setup of test
We fed water through the hose into the T. Through a large hole cut into the cable, water is forced into the cable, which has since been monitored for 14 days for evidence of leakage. So far, none has been found even though the water pressure is 3x that expected at Kamioka.


The assembled splice
This is the design for the addition of the 50 ohm resistor that must be added to the signal cable. A "T" is cut and the resistor is soldered onto the pin in the middle.


T design for addition of 50 ohm resistor
The design for the splice, including the modified T and heat shrink wrap around the entire splice.


Design for the BNC connection
Design for the splicing of BNC connectors onto the ends of the flooded cable. In addition, we will be adding RTV around the crimp for extra insurance of blocking any water present inside the cable jacket.



Last updated: May 4, 2000
jamessim@tunl.duke.edu