Air flow is the key in most of it. I have a 125 watt transmitter at a remote site at the bottom of a water tower. It sets under the tank where it gets water dripping on it in the summer mornings. It is mounted in a home made aluminum box 2'x2'x28" with 3/4" Styrofoam insulation. I put a 4" vent fan in top of the box running all the time. It has vents on 3 sides down low plus the cooling fans on the equipment. No problem with humidity, But the transmitter heatsink temp at close proximity to the final was pushing 125 degrees. So my problem was recirculating warm air inside the cabinet. I cut an 8" whole in the 4th side where I had no vent. I mounted a high volume, high speed, 8" fan and it comes on when the transmitter is keyed. This floods the cabinet with fresh air and drives out the heat. It dropped the temp 15 degrees. I'll just have to watch it in the winter time about being too cool. Hope this helps. Bruce. KD4BOH. ----- Original Message ----- From: "Mark A. Holman" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, June 19, 2005 8:03 PM Subject: Re: [Repeater-Builder] Water Tower Humidity
>I was thinking on the order which is solar powered charger & supply like >say > a batch of muffin fans from the computer P/S ? I heard something like > that > some time back to cool the attic to a house besides free electricity & > environmentally friendly. > > as to humidity problem, I would go to a place that sells dehumidifiers ( > around $130.00 ) the GE model has a hose attachment @ the bottom of the > tank > and run a drain tube on the floor to the outside. pvc flex tubing or cheap > water pipe at home builders supply would work, or a plain garden hose > would > work. > > just some thoughts ... > > Mark A. Holman AB8RU ARRL Life Member > [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Joe" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Sunday, June 19, 2005 7:18 AM > Subject: Re: [Repeater-Builder] Water Tower Humidity > > >>I am involved in planning a similar installation. The other problem is >>that the base gets extremely hot in the summertime. I was thinking of >>connecting a clothes dryer vent hose to one of the unused entry ports that >>the coax usually gets routed through the wall. (The flexible solid >>aluminum type, not the cheap stuff). Then, air could be drawn from the >>outside to cool the cabinet and keep the humid air out. I would control >>the fan in the cabinet with a thermostat to keep it warm in the >>wintertime. >> >> Joe >> >> ---- Chris <[EMAIL PROTECTED]> wrote: >>> Hi all! >>> I have the opportunity to place a UHF repeater into the base of a >>> water tower which is quite high. Comes with all the bells and >>> whistles and would be an excellent site. However, it is quite humid >>> inside and I'm afraid the repeater will get condensation buildup. >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >> > > > > > > > Yahoo! Groups Links > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
