Did the DXE board have a conformal coating applied? If it did not (which is poor design considering it is intended to operate outdoors), you can get small cans of the stuff made by Techni-Spray. I've use the silicone conformal coating on some boards I've made for outdoor use and it holds up well IF you prep the board properly first (they make a cleaner for this purpose). I found if you cheap out and skip the cleaning part the coating doesn't adhere well and tends water can get under the coating and damage the board.
Neither the conformal coating nor the "Blue Shower" cleaner that the recommend are cheap, but they do work well. If you use the coating make sure to mask off things like contact strips and contact surfaces. I found that most common tape doesn't stay stuck when you apply the conformal coating so you have to use the fancier tapes made for use in the PC board manufacturing process (the kapton tapes seem to work OK). -Bill > I would avoid any attempts to do relay switching by supplying voltage down > a > coax cable but rather use two coax runs. The relay, blocking cap, diode > and > associated circuit in my case with two DXE boxes have deteriorate within > less than a year to be useless, mostly due to electrolysis and zillions of > ants attracted apparantly by the voltage or relay coil vibration when > pulled > in. (Yes I covered all the edges with > silicon sealant) DXE refuses to send me a print to repair the board [snip] > Herb, KV4FZ _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
