> > --=====================_704480093==.ALT > Content-Type: text/plain; charset="us-ascii"; format=flowed > > Ok, saw the pictures at http://www2.uwave.com/wgb340a.jpg > > Looks like a pretty good setup.
Actually - it's the *worst* one I've ever done - it was made late one night for an install the next day - hacked with more capacitance when it needed it - ran off 12V instead of 48 - It's not going back into use as it is - it will be rebuilt to today's much advanced standards. But it did run a and do its job! > > Looking at something similar for temporary use for a DMAT team I'm > helping out. > > Couple of questions: > > 1. What was used ( or recommended) for weather sealing ? > Are these just rubber gaskets ala weatherproof electrical boxes, or was > some type of RTV used, > in addition to the primary seal ? How water tight is/was it ? The NEMA box came with 4 screws in the corners which sealed up its internal gasket that stays with the lid. Because this box was recycled from scrap, it had more holes in it than we needed. So we filled some with RTV. Water never was a problem. 3M makes a sealing tape that's about 0.100 " thick and moldable. It comes in various widths - I use the 1.5" wide stuff. I mold it around cable entrances and it sticks to anything. It also doesn't age or get brittle. Best advice is think like water - it runs down - put the holes on the bottom and water won't run "up". Screens are good for keeping bugs out. Wasps are the worst My only real surprise was that the 4 corner screws on the NEMA 4 box rusted a tad in 3 years. I didn't expect that! > > 2. How would you handle heat dissipation in such a unit to protect the > electronics ? Back then we didn't know how it would behave - but it ran for 3 years w/o a problem. It was not sealed weather-proof so some air did come in and out the bottom holes. The cisco hardware is remarkably stable and didn't mind 100 degree (f) days - The box probably got to 120 (F) inside on those days. it even had direct sun exposure for a while with no problem. > > 3. What was used as the primary 12v power supply ? > Just a regulated 13.8V / 5A bench supply - at the end of the cable, it wasn't well regulated, but that didn't matter - the 340 got its 5V power right there, just 3" away - an the amp had its own internal regulators. I added a bigger electrolytic in the field because the current pulse when a packet got xmittted was so high -- I wanted a little stiffer 12V supply. > Thanks > > Enjoy! Everett > > > > > > --=====================_704480093==.ALT > Content-Type: text/html; charset="us-ascii" > > <html> > <body> > <font size=3>Ok, saw the pictures at > <a href="http://www2.uwave.com/wgb340a.jpg"; > eudora="autourl">http://www2.uwave.com/wgb340a.jpg<br><br> > </a>Looks like a pretty good setup.<br><br> > Looking at something similar for temporary use for a DMAT team I'm<br> > helping out.<br><br> > </font>Couple of questions:<br><br> > 1. What was used ( or recommended) for weather sealing ?<br> > Are these just rubber gaskets ala weatherproof electrical boxes, or was > some type of RTV used, <br> > in addition to the primary seal ? How water tight is/was it > ?<br><br> > 2. How would you handle heat dissipation in such a unit to protect > the electronics ?<br><br> > 3. What was used as the primary 12v power supply ?<br><br> > Thanks<br><br> > <br><br> > <br><br> > <br> > </body> > </html> > > --=====================_704480093==.ALT-- > > -- > general wireless list, a bawug thing <http://www.bawug.org/> > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
![http://www2.uwave.com/wgb340a.jpg"](http://www2.uwave.com/wgb340a.jpg"){kind=link}