Remote antenna selection switchbox

Here is a shot of the homebrew antenna selector switchbox that is mounted on the tower. I built this one from an article in QST. It effectively grounds all antenna's and control cables when the power in removed from the unit. It uses heavy duty Potter& Brumfield PRD-11DYO-24 wide spaced contact relay's. Everything is housed in a Hoffman water proof enclosure. All cables entering the enclosure are routed thru bulkhead connectors that have sealed gaskets to prevent moisture from entering. This unit is used to select either the 75 or 40 meter Delta loop's, the 160 meter Inverted L or the tribander. I would highly recommend this switchbox to anyone needing a heavy duty unit. It was engineered and constructed by W5AN and the article appeared in QST in August of 1997. This photo was taken prior to completion.